diff options
46 files changed, 1293 insertions, 1179 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index beae3fde075..f7735c72c12 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2565,6 +2565,120 @@ associated with the service will be forgotten, and subsequent RTAS calls by the guest for that service will be passed to userspace to be handled. +4.87 KVM_SET_GUEST_DEBUG + +Capability: KVM_CAP_SET_GUEST_DEBUG +Architectures: x86, s390, ppc +Type: vcpu ioctl +Parameters: struct kvm_guest_debug (in) +Returns: 0 on success; -1 on error + +struct kvm_guest_debug { + __u32 control; + __u32 pad; + struct kvm_guest_debug_arch arch; +}; + +Set up the processor specific debug registers and configure vcpu for +handling guest debug events. There are two parts to the structure, the +first a control bitfield indicates the type of debug events to handle +when running. Common control bits are: + + - KVM_GUESTDBG_ENABLE: guest debugging is enabled + - KVM_GUESTDBG_SINGLESTEP: the next run should single-step + +The top 16 bits of the control field are architecture specific control +flags which can include the following: + + - KVM_GUESTDBG_USE_SW_BP: using software breakpoints [x86] + - KVM_GUESTDBG_USE_HW_BP: using hardware breakpoints [x86, s390] + - KVM_GUESTDBG_INJECT_DB: inject DB type exception [x86] + - KVM_GUESTDBG_INJECT_BP: inject BP type exception [x86] + - KVM_GUESTDBG_EXIT_PENDING: trigger an immediate guest exit [s390] + +For example KVM_GUESTDBG_USE_SW_BP indicates that software breakpoints +are enabled in memory so we need to ensure breakpoint exceptions are +correctly trapped and the KVM run loop exits at the breakpoint and not +running off into the normal guest vector. For KVM_GUESTDBG_USE_HW_BP +we need to ensure the guest vCPUs architecture specific registers are +updated to the correct (supplied) values. + +The second part of the structure is architecture specific and +typically contains a set of debug registers. + +When debug events exit the main run loop with the reason +KVM_EXIT_DEBUG with the kvm_debug_exit_arch part of the kvm_run +structure containing architecture specific debug information. + +4.88 KVM_GET_EMULATED_CPUID + +Capability: KVM_CAP_EXT_EMUL_CPUID +Architectures: x86 +Type: system ioctl +Parameters: struct kvm_cpuid2 (in/out) +Returns: 0 on success, -1 on error + +struct kvm_cpuid2 { + __u32 nent; + __u32 flags; + struct kvm_cpuid_entry2 entries[0]; +}; + +The member 'flags' is used for passing flags from userspace. + +#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) +#define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) +#define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) + +struct kvm_cpuid_entry2 { + __u32 function; + __u32 index; + __u32 flags; + __u32 eax; + __u32 ebx; + __u32 ecx; + __u32 edx; + __u32 padding[3]; +}; + +This ioctl returns x86 cpuid features which are emulated by +kvm.Userspace can use the information returned by this ioctl to query +which features are emulated by kvm instead of being present natively. + +Userspace invokes KVM_GET_EMULATED_CPUID by passing a kvm_cpuid2 +structure with the 'nent' field indicating the number of entries in +the variable-size array 'entries'. If the number of entries is too low +to describe the cpu capabilities, an error (E2BIG) is returned. If the +number is too high, the 'nent' field is adjusted and an error (ENOMEM) +is returned. If the number is just right, the 'nent' field is adjusted +to the number of valid entries in the 'entries' array, which is then +filled. + +The entries returned are the set CPUID bits of the respective features +which kvm emulates, as returned by the CPUID instruction, with unknown +or unsupported feature bits cleared. + +Features like x2apic, for example, may not be present in the host cpu +but are exposed by kvm in KVM_GET_SUPPORTED_CPUID because they can be +emulated efficiently and thus not included here. + +The fields in each entry are defined as follows: + + function: the eax value used to obtain the entry + index: the ecx value used to obtain the entry (for entries that are + affected by ecx) + flags: an OR of zero or more of the following: + KVM_CPUID_FLAG_SIGNIFCANT_INDEX: + if the index field is valid + KVM_CPUID_FLAG_STATEFUL_FUNC: + if cpuid for this function returns different values for successive + invocations; there will be several entries with the same function, + all with this flag set + KVM_CPUID_FLAG_STATE_READ_NEXT: + for KVM_CPUID_FLAG_STATEFUL_FUNC entries, set if this entry is + the first entry to be read by a cpu + eax, ebx, ecx, edx: the values returned by the cpuid instruction for + this function/index combination 5. The kvm_run structure ------------------------ @@ -2861,78 +2975,12 @@ kvm_valid_regs for specific bits. These bits are architecture specific and usually define the validity of a groups of registers. (e.g. one bit for general purpose registers) -}; - +Please note that the kernel is allowed to use the kvm_run structure as the +primary storage for certain register types. Therefore, the kernel may use the +values in kvm_run even if the corresponding bit in kvm_dirty_regs is not set. -4.81 KVM_GET_EMULATED_CPUID - -Capability: KVM_CAP_EXT_EMUL_CPUID -Architectures: x86 -Type: system ioctl -Parameters: struct kvm_cpuid2 (in/out) -Returns: 0 on success, -1 on error - -struct kvm_cpuid2 { - __u32 nent; - __u32 flags; - struct kvm_cpuid_entry2 entries[0]; }; -The member 'flags' is used for passing flags from userspace. - -#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) -#define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) -#define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) - -struct kvm_cpuid_entry2 { - __u32 function; - __u32 index; - __u32 flags; - __u32 eax; - __u32 ebx; - __u32 ecx; - __u32 edx; - __u32 padding[3]; -}; - -This ioctl returns x86 cpuid features which are emulated by -kvm.Userspace can use the information returned by this ioctl to query -which features are emulated by kvm instead of being present natively. - -Userspace invokes KVM_GET_EMULATED_CPUID by passing a kvm_cpuid2 -structure with the 'nent' field indicating the number of entries in -the variable-size array 'entries'. If the number of entries is too low -to describe the cpu capabilities, an error (E2BIG) is returned. If the -number is too high, the 'nent' field is adjusted and an error (ENOMEM) -is returned. If the number is just right, the 'nent' field is adjusted -to the number of valid entries in the 'entries' array, which is then -filled. - -The entries returned are the set CPUID bits of the respective features -which kvm emulates, as returned by the CPUID instruction, with unknown -or unsupported feature bits cleared. - -Features like x2apic, for example, may not be present in the host cpu -but are exposed by kvm in KVM_GET_SUPPORTED_CPUID because they can be -emulated efficiently and thus not included here. - -The fields in each entry are defined as follows: - - function: the eax value used to obtain the entry - index: the ecx value used to obtain the entry (for entries that are - affected by ecx) - flags: an OR of zero or more of the following: - KVM_CPUID_FLAG_SIGNIFCANT_INDEX: - if the index field is valid - KVM_CPUID_FLAG_STATEFUL_FUNC: - if cpuid for this function returns different values for successive - invocations; there will be several entries with the same function, - all with this flag set - KVM_CPUID_FLAG_STATE_READ_NEXT: - for KVM_CPUID_FLAG_STATEFUL_FUNC entries, set if this entry is - the first entry to be read by a cpu - eax, ebx, ecx, edx: the values returned by the cpuid instruction for - this function/index combination 6. Capabilities that can be enabled on vCPUs diff --git a/Documentation/virtual/kvm/mmu.txt b/Documentation/virtual/kvm/mmu.txt index 29089417614..53838d9c629 100644 --- a/Documentation/virtual/kvm/mmu.txt +++ b/Documentation/virtual/kvm/mmu.txt @@ -425,6 +425,20 @@ fault through the slow path. Since only 19 bits are used to store generation-number on mmio spte, all pages are zapped when there is an overflow. +Unfortunately, a single memory access might access kvm_memslots(kvm) multiple +times, the last one happening when the generation number is retrieved and +stored into the MMIO spte. Thus, the MMIO spte might be created based on +out-of-date information, but with an up-to-date generation number. + +To avoid this, the generation number is incremented again after synchronize_srcu +returns; thus, the low bit of kvm_memslots(kvm)->generation is only 1 during a +memslot update, while some SRCU readers might be using the old copy. We do not +want to use an MMIO sptes created with an odd generation number, and we can do +this without losing a bit in the MMIO spte. The low bit of the generation +is not stored in MMIO spte, and presumed zero when it is extracted out of the +spte. If KVM is unlucky and creates an MMIO spte while the low bit is 1, +the next access to the spte will always be a cache miss. + Further reading =============== diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index fcb12a6f7db..46e5d4da198 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -19,6 +19,8 @@ #ifndef __ARM_KVM_HOST_H__ #define __ARM_KVM_HOST_H__ +#include <linux/types.h> +#include <linux/kvm_types.h> #include <asm/kvm.h> #include <asm/kvm_asm.h> #include <asm/kvm_mmio.h> @@ -40,7 +42,6 @@ #include <kvm/arm_vgic.h> -struct kvm_vcpu; u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode); int __attribute_const__ kvm_target_cpu(void); int kvm_reset_vcpu(struct kvm_vcpu *vcpu); @@ -149,20 +150,17 @@ struct kvm_vcpu_stat { u32 halt_wakeup; }; -struct kvm_vcpu_init; int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init); int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); -struct kvm_one_reg; int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); u64 kvm_call_hyp(void *hypfn, ...); void force_vm_exit(const cpumask_t *mask); #define KVM_ARCH_WANT_MMU_NOTIFIER -struct kvm; int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); @@ -187,7 +185,6 @@ struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu); -struct kvm_one_reg; int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); @@ -233,4 +230,10 @@ static inline void vgic_arch_setup(const struct vgic_params *vgic) int kvm_perf_init(void); int kvm_perf_teardown(void); +static inline void kvm_arch_hardware_disable(void) {} +static inline void kvm_arch_hardware_unsetup(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} + #endif /* __ARM_KVM_HOST_H__ */ diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index 53ee31b2396..88c901cfc75 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -87,7 +87,7 @@ struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) return &kvm_arm_running_vcpu; } -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { return 0; } @@ -97,27 +97,16 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; } -void kvm_arch_hardware_disable(void *garbage) -{ -} - int kvm_arch_hardware_setup(void) { return 0; } -void kvm_arch_hardware_unsetup(void) -{ -} - void kvm_arch_check_processor_compat(void *rtn) { *(int *)rtn = 0; } -void kvm_arch_sync_events(struct kvm *kvm) -{ -} /** * kvm_arch_init_vm - initializes a VM data structure @@ -285,14 +274,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) return 0; } -void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) -{ -} - -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ -} - void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { vcpu->cpu = cpu; diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 50431d36732..bcde4190574 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -22,6 +22,8 @@ #ifndef __ARM64_KVM_HOST_H__ #define __ARM64_KVM_HOST_H__ +#include <linux/types.h> +#include <linux/kvm_types.h> #include <asm/kvm.h> #include <asm/kvm_asm.h> #include <asm/kvm_mmio.h> @@ -41,7 +43,6 @@ #define KVM_VCPU_MAX_FEATURES 3 -struct kvm_vcpu; int __attribute_const__ kvm_target_cpu(void); int kvm_reset_vcpu(struct kvm_vcpu *vcpu); int kvm_arch_dev_ioctl_check_extension(long ext); @@ -164,18 +165,15 @@ struct kvm_vcpu_stat { u32 halt_wakeup; }; -struct kvm_vcpu_init; int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init); int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); -struct kvm_one_reg; int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); #define KVM_ARCH_WANT_MMU_NOTIFIER -struct kvm; int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); @@ -244,4 +242,10 @@ static inline void vgic_arch_setup(const struct vgic_params *vgic) } } +static inline void kvm_arch_hardware_disable(void) {} +static inline void kvm_arch_hardware_unsetup(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} + #endif /* __ARM64_KVM_HOST_H__ */ diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h index db95f570705..4729752b725 100644 --- a/arch/ia64/include/asm/kvm_host.h +++ b/arch/ia64/include/asm/kvm_host.h @@ -234,9 +234,6 @@ struct kvm_vm_data { #define KVM_REQ_PTC_G 32 #define KVM_REQ_RESUME 33 -struct kvm; -struct kvm_vcpu; - struct kvm_mmio_req { uint64_t addr; /* physical address */ uint64_t size; /* size in bytes */ @@ -595,6 +592,18 @@ void kvm_sal_emul(struct kvm_vcpu *vcpu); struct kvm *kvm_arch_alloc_vm(void); void kvm_arch_free_vm(struct kvm *kvm); +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_free_memslot(struct kvm *kvm, + struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {} +static inline void kvm_arch_memslots_updated(struct kvm *kvm) {} +static inline void kvm_arch_commit_memory_region(struct kvm *kvm, + struct kvm_userspace_memory_region *mem, + const struct kvm_memory_slot *old, + enum kvm_mr_change change) {} +static inline void kvm_arch_hardware_unsetup(void) {} + #endif /* __ASSEMBLY__*/ #endif diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 0729ba6acdd..ec6b9acb6be 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -125,7 +125,7 @@ long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler) static DEFINE_SPINLOCK(vp_lock); -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { long status; long tmp_base; @@ -160,7 +160,7 @@ int kvm_arch_hardware_enable(void *garbage) return 0; } -void kvm_arch_hardware_disable(void *garbage) +void kvm_arch_hardware_disable(void) { long status; @@ -1364,10 +1364,6 @@ static void kvm_release_vm_pages(struct kvm *kvm) } } -void kvm_arch_sync_events(struct kvm *kvm) -{ -} - void kvm_arch_destroy_vm(struct kvm *kvm) { kvm_iommu_unmap_guest(kvm); @@ -1376,10 +1372,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm) kvm_release_vm_pages(kvm); } -void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) -{ -} - void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { if (cpu != vcpu->cpu) { @@ -1468,7 +1460,6 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) kfree(vcpu->arch.apic); } - long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -1551,21 +1542,12 @@ int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) return VM_FAULT_SIGBUS; } -void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, - struct kvm_memory_slot *dont) -{ -} - int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned long npages) { return 0; } -void kvm_arch_memslots_updated(struct kvm *kvm) -{ -} - int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem, @@ -1597,14 +1579,6 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, return 0; } -void kvm_arch_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem, - const struct kvm_memory_slot *old, - enum kvm_mr_change change) -{ - return; -} - void kvm_arch_flush_shadow_all(struct kvm *kvm) { kvm_flush_remote_tlbs(kvm); @@ -1853,10 +1827,6 @@ int kvm_arch_hardware_setup(void) return 0; } -void kvm_arch_hardware_unsetup(void) -{ -} - int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq) { return __apic_accept_irq(vcpu, irq->vector); diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 7a3fc67bd7f..f2c249796ea 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -96,11 +96,6 @@ #define CAUSEB_DC 27 #define CAUSEF_DC (_ULCAST_(1) << 27) -struct kvm; -struct kvm_run; -struct kvm_vcpu; -struct kvm_interrupt; - extern atomic_t kvm_mips_instance; extern pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn); extern void (*kvm_mips_release_pfn_clean) (pfn_t pfn); @@ -767,5 +762,16 @@ extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu); extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm); +static inline void kvm_arch_hardware_disable(void) {} +static inline void kvm_arch_hardware_unsetup(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_free_memslot(struct kvm *kvm, + struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {} +static inline void kvm_arch_memslots_updated(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) {} +static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} #endif /* __MIPS_KVM_HOST_H__ */ diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index 2362df2a79f..e3b21e51ff7 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -77,24 +77,16 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) return 1; } -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { return 0; } -void kvm_arch_hardware_disable(void *garbage) -{ -} - int kvm_arch_hardware_setup(void) { return 0; } -void kvm_arch_hardware_unsetup(void) -{ -} - void kvm_arch_check_processor_compat(void *rtn) { *(int *)rtn = 0; @@ -163,10 +155,6 @@ void kvm_mips_free_vcpus(struct kvm *kvm) mutex_unlock(&kvm->lock); } -void kvm_arch_sync_events(struct kvm *kvm) -{ -} - static void kvm_mips_uninit_tlbs(void *arg) { /* Restore wired count */ @@ -194,21 +182,12 @@ long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, return -ENOIOCTLCMD; } -void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, - struct kvm_memory_slot *dont) -{ -} - int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned long npages) { return 0; } -void kvm_arch_memslots_updated(struct kvm *kvm) -{ -} - int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem, @@ -254,19 +233,6 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, } } -void kvm_arch_flush_shadow_all(struct kvm *kvm) -{ -} - -void kvm_arch_flush_shadow_memslot(struct kvm *kvm, - struct kvm_memory_slot *slot) -{ -} - -void kvm_arch_flush_shadow(struct kvm *kvm) -{ -} - struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) { int err, size, offset; @@ -998,14 +964,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) return 0; } -void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) -{ -} - -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ -} - int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr) { diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 98d9dd50d06..60400088235 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -53,7 +53,6 @@ #define KVM_ARCH_WANT_MMU_NOTIFIER -struct kvm; extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); extern int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); @@ -76,10 +75,6 @@ extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); /* Physical Address Mask - allowed range of real mode RAM access */ #define KVM_PAM 0x0fffffffffffffffULL -struct kvm; -struct kvm_run; -struct kvm_vcpu; - struct lppaca; struct slb_shadow; struct dtl_entry; @@ -687,4 +682,12 @@ struct kvm_vcpu_arch { #define __KVM_HAVE_ARCH_WQP #define __KVM_HAVE_CREATE_DEVICE +static inline void kvm_arch_hardware_disable(void) {} +static inline void kvm_arch_hardware_unsetup(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_memslots_updated(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} +static inline void kvm_arch_exit(void) {} + #endif /* __POWERPC_KVM_HOST_H__ */ diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index cbc432f4f0a..da505237a66 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -384,24 +384,16 @@ int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, } EXPORT_SYMBOL_GPL(kvmppc_ld); -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { return 0; } -void kvm_arch_hardware_disable(void *garbage) -{ -} - int kvm_arch_hardware_setup(void) { return 0; } -void kvm_arch_hardware_unsetup(void) -{ -} - void kvm_arch_check_processor_compat(void *rtn) { *(int *)rtn = kvmppc_core_check_processor_compat(); @@ -462,10 +454,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm) module_put(kvm->arch.kvm_ops->owner); } -void kvm_arch_sync_events(struct kvm *kvm) -{ -} - int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) { int r; @@ -608,10 +596,6 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, return kvmppc_core_create_memslot(kvm, slot, npages); } -void kvm_arch_memslots_updated(struct kvm *kvm) -{ -} - int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem, @@ -628,10 +612,6 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, kvmppc_core_commit_memory_region(kvm, mem, old); } -void kvm_arch_flush_shadow_all(struct kvm *kvm) -{ -} - void kvm_arch_flush_shadow_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) { @@ -720,10 +700,6 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) kvmppc_subarch_vcpu_uninit(vcpu); } -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ -} - void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { #ifdef CONFIG_BOOKE @@ -1347,9 +1323,4 @@ int kvm_arch_init(void *opaque) return 0; } -void kvm_arch_exit(void) -{ - -} - EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr); diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 773bef7614d..1a6f6fd8bd3 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -13,8 +13,11 @@ #ifndef ASM_KVM_HOST_H #define ASM_KVM_HOST_H + +#include <linux/types.h> #include <linux/hrtimer.h> #include <linux/interrupt.h> +#include <linux/kvm_types.h> #include <linux/kvm_host.h> #include <linux/kvm.h> #include <asm/debug.h> @@ -154,7 +157,9 @@ struct kvm_s390_sie_block { __u8 armid; /* 0x00e3 */ __u8 reservede4[4]; /* 0x00e4 */ __u64 tecmc; /* 0x00e8 */ - __u8 reservedf0[16]; /* 0x00f0 */ + __u8 reservedf0[12]; /* 0x00f0 */ +#define CRYCB_FORMAT1 0x00000001 + __u32 crycbd; /* 0x00fc */ __u64 gcr[16]; /* 0x0100 */ __u64 gbea; /* 0x0180 */ __u8 reserved188[24]; /* 0x0188 */ @@ -407,6 +412,15 @@ struct s390_io_adapter { #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8) #define MAX_S390_ADAPTER_MAPS 256 +struct kvm_s390_crypto { + struct kvm_s390_crypto_cb *crycb; + __u32 crycbd; +}; + +struct kvm_s390_crypto_cb { + __u8 reserved00[128]; /* 0x0000 */ +}; + struct kvm_arch{ struct sca_block *sca; debug_info_t *dbf; @@ -420,6 +434,7 @@ struct kvm_arch{ struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS]; wait_queue_head_t ipte_wq; spinlock_t start_stop_lock; + struct kvm_s390_crypto crypto; }; #define KVM_HVA_ERR_BAD (-1UL) @@ -431,8 +446,6 @@ static inline bool kvm_is_error_hva(unsigned long addr) } #define ASYNC_PF_PER_VCPU 64 -struct kvm_vcpu; -struct kvm_async_pf; struct kvm_arch_async_pf { unsigned long pfault_token; }; @@ -450,4 +463,18 @@ void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, extern int sie64a(struct kvm_s390_sie_block *, u64 *); extern char sie_exit; + +static inline void kvm_arch_hardware_disable(void) {} +static inline void kvm_arch_check_processor_compat(void *rtn) {} +static inline void kvm_arch_exit(void) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} +static inline void kvm_arch_free_memslot(struct kvm *kvm, + struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {} +static inline void kvm_arch_memslots_updated(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) {} + #endif diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index 9e18a61d3df..d39a31c3cdf 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -18,9 +18,9 @@ unsigned long *crst_table_alloc(struct mm_struct *); void crst_table_free(struct mm_struct *, unsigned long *); -unsigned long *page_table_alloc(struct mm_struct *, unsigned long); +unsigned long *page_table_alloc(struct mm_struct *); void page_table_free(struct mm_struct *, unsigned long *); -void page_table_free_rcu(struct mmu_gather *, unsigned long *); +void page_table_free_rcu(struct mmu_gather *, unsigned long *, unsigned long); void page_table_reset_pgste(struct mm_struct *, unsigned long, unsigned long, bool init_skey); @@ -145,8 +145,8 @@ static inline void pmd_populate(struct mm_struct *mm, /* * page table entry allocation/free routines. */ -#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr)) -#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr)) +#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) +#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) #define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte) #define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index b76317c1f3e..0242588ded6 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -30,6 +30,7 @@ #include <linux/sched.h> #include <linux/mm_types.h> #include <linux/page-flags.h> +#include <linux/radix-tree.h> #include <asm/bug.h> #include <asm/page.h> @@ -789,82 +790,67 @@ static inline pgste_t pgste_set_pte(pte_t *ptep, pgste_t pgste, pte_t entry) /** * struct gmap_struct - guest address space + * @crst_list: list of all crst tables used in the guest address space * @mm: pointer to the parent mm_struct + * @guest_to_host: radix tree with guest to host address translation + * @host_to_guest: radix tree with pointer to segment table entries + * @guest_table_lock: spinlock to protect all entries in the guest page table * @table: pointer to the page directory * @asce: address space control element for gmap page table - * @crst_list: list of all crst tables used in the guest address space * @pfault_enabled: defines if pfaults are applicable for the guest */ struct gmap { struct list_head list; + struct list_head crst_list; struct mm_struct *mm; + struct radix_tree_root guest_to_host; + struct radix_tree_root host_to_guest; + spinlock_t guest_table_lock; unsigned long *table; unsigned long asce; + unsigned long asce_end; void *private; - struct list_head crst_list; bool pfault_enabled; }; /** - * struct gmap_rmap - reverse mapping for segment table entries - * @gmap: pointer to the gmap_struct - * @entry: pointer to a segment table entry - * @vmaddr: virtual address in the guest address space - */ -struct gmap_rmap { - struct list_head list; - struct gmap *gmap; - unsigned long *entry; - unsigned long vmaddr; -}; - -/** - * struct gmap_pgtable - gmap information attached to a page table - * @vmaddr: address of the 1MB segment in the process virtual memory - * @mapper: list of segment table entries mapping a page table - */ -struct gmap_pgtable { - unsigned long vmaddr; - struct list_head mapper; -}; - -/** * struct gmap_notifier - notify function block for page invalidation * @notifier_call: address of callback function */ struct gmap_notifier { struct list_head list; - void (*notifier_call)(struct gmap *gmap, unsigned long address); + void (*notifier_call)(struct gmap *gmap, unsigned long gaddr); }; -struct gmap *gmap_alloc(struct mm_struct *mm); +struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit); void gmap_free(struct gmap *gmap); void gmap_enable(struct gmap *gmap); void gmap_disable(struct gmap *gmap); int gmap_map_segment(struct gmap *gmap, unsigned long from, unsigned long to, unsigned long len); int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); -unsigned long __gmap_translate(unsigned long address, struct gmap *); -unsigned long gmap_translate(unsigned long address, struct gmap *); -unsigned long __gmap_fault(unsigned long address, struct gmap *); -unsigned long gmap_fault(unsigned long address, struct gmap *); -void gmap_discard(unsigned long from, unsigned long to, struct gmap *); -void __gmap_zap(unsigned long address, struct gmap *); +unsigned long __gmap_translate(struct gmap *, unsigned long gaddr); +unsigned long gmap_translate(struct gmap *, unsigned long gaddr); +int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr); +int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags); +void gmap_discard(struct gmap *, unsigned long from, unsigned long to); +void __gmap_zap(struct gmap *, unsigned long gaddr); bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *); void gmap_register_ipte_notifier(struct gmap_notifier *); void gmap_unregister_ipte_notifier(struct gmap_notifier *); int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len); -void gmap_do_ipte_notify(struct mm_struct *, pte_t *); +void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *); static inline pgste_t pgste_ipte_notify(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, pgste_t pgste) { #ifdef CONFIG_PGSTE if (pgste_val(pgste) & PGSTE_IN_BIT) { pgste_val(pgste) &= ~PGSTE_IN_BIT; - gmap_do_ipte_notify(mm, ptep); + gmap_do_ipte_notify(mm, addr, ptep); } #endif return pgste; @@ -1110,7 +1096,7 @@ static inline int ptep_test_and_clear_user_dirty(struct mm_struct *mm, pgste_val(pgste) &= ~PGSTE_UC_BIT; pte = *ptep; if (dirty && (pte_val(pte) & _PAGE_PRESENT)) { - pgste = pgste_ipte_notify(mm, ptep, pgste); + pgste = pgste_ipte_notify(mm, addr, ptep, pgste); __ptep_ipte(addr, ptep); if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE)) pte_val(pte) |= _PAGE_PROTECT; @@ -1132,7 +1118,7 @@ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, if (mm_has_pgste(vma->vm_mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste); + pgste = pgste_ipte_notify(vma->vm_mm, addr, ptep, pgste); } pte = *ptep; @@ -1178,7 +1164,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(mm, ptep, pgste); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); } pte = *ptep; @@ -1202,7 +1188,7 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); - pgste_ipte_notify(mm, ptep, pgste); + pgste_ipte_notify(mm, address, ptep, pgste); } pte = *ptep; @@ -1239,7 +1225,7 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma, if (mm_has_pgste(vma->vm_mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste); + pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); } pte = *ptep; @@ -1273,7 +1259,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, if (!full && mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(mm, ptep, pgste); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); } pte = *ptep; @@ -1298,7 +1284,7 @@ static inline pte_t ptep_set_wrprotect(struct mm_struct *mm, if (pte_write(pte)) { if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(mm, ptep, pgste); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); } ptep_flush_lazy(mm, address, ptep); @@ -1324,7 +1310,7 @@ static inline int ptep_set_access_flags(struct vm_area_struct *vma, return 0; if (mm_has_pgste(vma->vm_mm)) { pgste = pgste_get_lock(ptep); - pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste); + pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); } ptep_flush_direct(vma->vm_mm, address, ptep); diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index a25f09fbaf3..572c5994900 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -105,7 +105,7 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long address) { - page_table_free_rcu(tlb, (unsigned long *) pte); + page_table_free_rcu(tlb, (unsigned long *) pte, address); } /* diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 0fc26430a1e..48eda3ab494 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -111,12 +111,22 @@ struct kvm_guest_debug_arch { #define KVM_SYNC_GPRS (1UL << 1) #define KVM_SYNC_ACRS (1UL << 2) #define KVM_SYNC_CRS (1UL << 3) +#define KVM_SYNC_ARCH0 (1UL << 4) +#define KVM_SYNC_PFAULT (1UL << 5) /* definition of registers in kvm_run */ struct kvm_sync_regs { __u64 prefix; /* prefix register */ __u64 gprs[16]; /* general purpose registers */ __u32 acrs[16]; /* access registers */ __u64 crs[16]; /* control registers */ + __u64 todpr; /* tod programmable register [ARCH0] */ + __u64 cputm; /* cpu timer [ARCH0] */ + __u64 ckc; /* clock comparator [ARCH0] */ + __u64 pp; /* program parameter [ARCH0] */ + __u64 gbea; /* guest breaking-event address [ARCH0] */ + __u64 pft; /* pfault token [PFAULT] */ + __u64 pfs; /* pfault select [PFAULT] */ + __u64 pfc; /* pfault compare [PFAULT] */ }; #define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1) diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c index 59bd8f991b9..9254afff250 100644 --- a/arch/s390/kvm/diag.c +++ b/arch/s390/kvm/diag.c @@ -28,22 +28,32 @@ static int diag_release_pages(struct kvm_vcpu *vcpu) start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4]; end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096; - if (start & ~PAGE_MASK || end & ~PAGE_MASK || start > end + if (start & ~PAGE_MASK || end & ~PAGE_MASK || start >= end || start < 2 * PAGE_SIZE) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); VCPU_EVENT(vcpu, 5, "diag release pages %lX %lX", start, end); vcpu->stat.diagnose_10++; - /* we checked for start > end above */ - if (end < prefix || start >= prefix + 2 * PAGE_SIZE) { - gmap_discard(start, end, vcpu->arch.gmap); + /* + * We checked for start >= end above, so lets check for the + * fast path (no prefix swap page involved) + */ + if (end <= prefix || start >= prefix + 2 * PAGE_SIZE) { + gmap_discard(vcpu->arch.gmap, start, end); } else { - if (start < prefix) - gmap_discard(start, prefix, vcpu->arch.gmap); - if (end >= prefix) - gmap_discard(prefix + 2 * PAGE_SIZE, - end, vcpu->arch.gmap); + /* + * This is slow path. gmap_discard will check for start + * so lets split this into before prefix, prefix, after + * prefix and let gmap_discard make some of these calls + * NOPs. + */ + gmap_discard(vcpu->arch.gmap, start, prefix); + if (start <= prefix) + gmap_discard(vcpu->arch.gmap, 0, 4096); + if (end > prefix + 4096) + gmap_discard(vcpu->arch.gmap, 4096, 8192); + gmap_discard(vcpu->arch.gmap, prefix + 2 * PAGE_SIZE, end); } return 0; } diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c index 4653ac6e182..0f961a1c64b 100644 --- a/arch/s390/kvm/gaccess.c +++ b/arch/s390/kvm/gaccess.c @@ -254,8 +254,7 @@ static void ipte_unlock_simple(struct kvm_vcpu *vcpu) new = old = ACCESS_ONCE(*ic); new.k = 0; } while (cmpxchg(&ic->val, old.val, new.val) != old.val); - if (!ipte_lock_count) - wake_up(&vcpu->kvm->arch.ipte_wq); + wake_up(&vcpu->kvm->arch.ipte_wq); out: mutex_unlock(&ipte_mutex); } diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index f4c819bfc19..4cad00adef9 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -26,8 +26,9 @@ #define IOINT_SSID_MASK 0x00030000 #define IOINT_CSSID_MASK 0x03fc0000 #define IOINT_AI_MASK 0x04000000 +#define PFAULT_INIT 0x0600 -static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu); +static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu); static int is_ioint(u64 type) { @@ -76,7 +77,7 @@ static u64 int_word_to_isc_bits(u32 int_word) return (0x80 >> isc) << 24; } -static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, +static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu, struct kvm_s390_interrupt_info *inti) { switch (inti->type) { @@ -85,6 +86,7 @@ static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, return 0; if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) return 1; + return 0; case KVM_S390_INT_EMERGENCY: if (psw_extint_disabled(vcpu)) return 0; @@ -205,11 +207,30 @@ static void __set_intercept_indicator(struct kvm_vcpu *vcpu, } } -static int __deliver_prog_irq(struct kvm_vcpu *vcpu, - struct kvm_s390_pgm_info *pgm_info) +static u16 get_ilc(struct kvm_vcpu *vcpu) { const unsigned short table[] = { 2, 4, 4, 6 }; + + switch (vcpu->arch.sie_block->icptcode) { + case ICPT_INST: + case ICPT_INSTPROGI: + case ICPT_OPEREXC: + case ICPT_PARTEXEC: + case ICPT_IOINST: + /* last instruction only stored for these icptcodes */ + return table[vcpu->arch.sie_block->ipa >> 14]; + case ICPT_PROGI: + return vcpu->arch.sie_block->pgmilc; + default: + return 0; + } +} + +static int __must_check __deliver_prog_irq(struct kvm_vcpu *vcpu, + struct kvm_s390_pgm_info *pgm_info) +{ int rc = 0; + u16 ilc = get_ilc(vcpu); switch (pgm_info->code & ~PGM_PER) { case PGM_AFX_TRANSLATION: @@ -276,25 +297,7 @@ static int __deliver_prog_irq(struct kvm_vcpu *vcpu, (u8 *) __LC_PER_ACCESS_ID); } - switch (vcpu->arch.sie_block->icptcode) { - case ICPT_INST: - case ICPT_INSTPROGI: - case ICPT_OPEREXC: - case ICPT_PARTEXEC: - case ICPT_IOINST: - /* last instruction only stored for these icptcodes */ - rc |= put_guest_lc(vcpu, table[vcpu->arch.sie_block->ipa >> 14], - (u16 *) __LC_PGM_ILC); - break; - case ICPT_PROGI: - rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->pgmilc, - (u16 *) __LC_PGM_ILC); - break; - default: - rc |= put_guest_lc(vcpu, 0, - (u16 *) __LC_PGM_ILC); - } - + rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); rc |= put_guest_lc(vcpu, pgm_info->code, (u16 *)__LC_PGM_INT_CODE); rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, @@ -305,7 +308,7 @@ static int __deliver_prog_irq(struct kvm_vcpu *vcpu, return rc; } -static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, +static int __must_check __do_deliver_interrupt(struct kvm_vcpu *vcpu, struct kvm_s390_interrupt_info *inti) { const unsigned short table[] = { 2, 4, 4, 6 }; @@ -343,7 +346,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, case KVM_S390_INT_CLOCK_COMP: trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, inti->ext.ext_params, 0); - deliver_ckc_interrupt(vcpu); + rc = deliver_ckc_interrupt(vcpu); break; case KVM_S390_INT_CPU_TIMER: trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, @@ -376,8 +379,9 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, case KVM_S390_INT_PFAULT_INIT: trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0, inti->ext.ext_params2); - rc = put_guest_lc(vcpu, 0x2603, (u16 *) __LC_EXT_INT_CODE); - rc |= put_guest_lc(vcpu, 0x0600, (u16 *) __LC_EXT_CPU_ADDR); + rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, + (u16 *) __LC_EXT_INT_CODE); + rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, @@ -501,14 +505,11 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, default: BUG(); } - if (rc) { - printk("kvm: The guest lowcore is not mapped during interrupt " - "delivery, killing userspace\n"); - do_exit(SIGKILL); - } + + return rc; } -static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu) +static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu) { int rc; @@ -518,11 +519,7 @@ static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu) rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); - if (rc) { - printk("kvm: The guest lowcore is not mapped during interrupt " - "delivery, killing userspace\n"); - do_exit(SIGKILL); - } + return rc; } /* Check whether SIGP interpretation facility has an external call pending */ @@ -661,12 +658,13 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl); } -void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) +int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; struct kvm_s390_interrupt_info *n, *inti = NULL; int deliver; + int rc = 0; __reset_intercept_indicators(vcpu); if (atomic_read(&li->active)) { @@ -685,16 +683,16 @@ void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) atomic_set(&li->active, 0); spin_unlock(&li->lock); if (deliver) { - __do_deliver_interrupt(vcpu, inti); + rc = __do_deliver_interrupt(vcpu, inti); kfree(inti); } - } while (deliver); + } while (!rc && deliver); } - if (kvm_cpu_has_pending_timer(vcpu)) - deliver_ckc_interrupt(vcpu); + if (!rc && kvm_cpu_has_pending_timer(vcpu)) + rc = deliver_ckc_interrupt(vcpu); - if (atomic_read(&fi->active)) { + if (!rc && atomic_read(&fi->active)) { do { deliver = 0; spin_lock(&fi->lock); @@ -711,67 +709,13 @@ void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) atomic_set(&fi->active, 0); spin_unlock(&fi->lock); if (deliver) { - __do_deliver_interrupt(vcpu, inti); - kfree(inti); - } - } while (deliver); - } -} - -void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu) -{ - struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; - struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; - struct kvm_s390_interrupt_info *n, *inti = NULL; - int deliver; - - __reset_intercept_indicators(vcpu); - if (atomic_read(&li->active)) { - do { - deliver = 0; - spin_lock(&li->lock); - list_for_each_entry_safe(inti, n, &li->list, list) { - if ((inti->type == KVM_S390_MCHK) && - __interrupt_is_deliverable(vcpu, inti)) { - list_del(&inti->list); - deliver = 1; - break; - } - __set_intercept_indicator(vcpu, inti); - } - if (list_empty(&li->list)) - atomic_set(&li->active, 0); - spin_unlock(&li->lock); - if (deliver) { - __do_deliver_interrupt(vcpu, inti); + rc = __do_deliver_interrupt(vcpu, inti); kfree(inti); } - } while (deliver); + } while (!rc && deliver); } - if (atomic_read(&fi->active)) { - do { - deliver = 0; - spin_lock(&fi->lock); - list_for_each_entry_safe(inti, n, &fi->list, list) { - if ((inti->type == KVM_S390_MCHK) && - __interrupt_is_deliverable(vcpu, inti)) { - list_del(&inti->list); - fi->irq_count--; - deliver = 1; - break; - } - __set_intercept_indicator(vcpu, inti); - } - if (list_empty(&fi->list)) - atomic_set(&fi->active, 0); - spin_unlock(&fi->lock); - if (deliver) { - __do_deliver_interrupt(vcpu, inti); - kfree(inti); - } - } while (deliver); - } + return rc; } int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) @@ -1048,7 +992,6 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm, s390int->parm64, 2); - mutex_lock(&vcpu->kvm->lock); li = &vcpu->arch.local_int; spin_lock(&li->lock); if (inti->type == KVM_S390_PROGRAM_INT) @@ -1060,7 +1003,6 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, li->action_bits |= ACTION_STOP_ON_STOP; atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); spin_unlock(&li->lock); - mutex_unlock(&vcpu->kvm->lock); kvm_s390_vcpu_wakeup(vcpu); return 0; } @@ -1300,7 +1242,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) } INIT_LIST_HEAD(&map->list); map->guest_addr = addr; - map->addr = gmap_translate(addr, kvm->arch.gmap); + map->addr = gmap_translate(kvm->arch.gmap, addr); if (map->addr == -EFAULT) { ret = -EFAULT; goto out; @@ -1410,7 +1352,6 @@ static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) r = enqueue_floating_irq(dev, attr); break; case KVM_DEV_FLIC_CLEAR_IRQS: - r = 0; kvm_s390_clear_float_irqs(dev->kvm); break; case KVM_DEV_FLIC_APF_ENABLE: diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a3c324ec437..56a411c0245 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -100,16 +100,12 @@ int test_vfacility(unsigned long nr) } /* Section: not file related */ -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { /* every s390 is virtualization enabled ;-) */ return 0; } -void kvm_arch_hardware_disable(void *garbage) -{ -} - static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); int kvm_arch_hardware_setup(void) @@ -124,17 +120,10 @@ void kvm_arch_hardware_unsetup(void) gmap_unregister_ipte_notifier(&gmap_notifier); } -void kvm_arch_check_processor_compat(void *rtn) -{ -} - int kvm_arch_init(void *opaque) { - return 0; -} - -void kvm_arch_exit(void) -{ + /* Register floating interrupt controller interface. */ + return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); } /* Section: device related */ @@ -404,6 +393,22 @@ long kvm_arch_vm_ioctl(struct file *filp, return r; } +static int kvm_s390_crypto_init(struct kvm *kvm) +{ + if (!test_vfacility(76)) + return 0; + + kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), + GFP_KERNEL | GFP_DMA); + if (!kvm->arch.crypto.crycb) + return -ENOMEM; + + kvm->arch.crypto.crycbd = (__u32) (unsigned long) kvm->arch.crypto.crycb | + CRYCB_FORMAT1; + + return 0; +} + int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { int rc; @@ -441,6 +446,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) if (!kvm->arch.dbf) goto out_nodbf; + if (kvm_s390_crypto_init(kvm) < 0) + goto out_crypto; + spin_lock_init(&kvm->arch.float_int.lock); INIT_LIST_HEAD(&kvm->arch.float_int.list); init_waitqueue_head(&kvm->arch.ipte_wq); @@ -451,7 +459,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) if (type & KVM_VM_S390_UCONTROL) { kvm->arch.gmap = NULL; } else { - kvm->arch.gmap = gmap_alloc(current->mm); + kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); if (!kvm->arch.gmap) goto out_nogmap; kvm->arch.gmap->private = kvm; @@ -465,6 +473,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) return 0; out_nogmap: + kfree(kvm->arch.crypto.crycb); +out_crypto: debug_unregister(kvm->arch.dbf); out_nodbf: free_page((unsigned long)(kvm->arch.sca)); @@ -514,15 +524,12 @@ static void kvm_free_vcpus(struct kvm *kvm) mutex_unlock(&kvm->lock); } -void kvm_arch_sync_events(struct kvm *kvm) -{ -} - void kvm_arch_destroy_vm(struct kvm *kvm) { kvm_free_vcpus(kvm); free_page((unsigned long)(kvm->arch.sca)); debug_unregister(kvm->arch.dbf); + kfree(kvm->arch.crypto.crycb); if (!kvm_is_ucontrol(kvm)) gmap_free(kvm->arch.gmap); kvm_s390_destroy_adapters(kvm); @@ -535,7 +542,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; kvm_clear_async_pf_completion_queue(vcpu); if (kvm_is_ucontrol(vcpu->kvm)) { - vcpu->arch.gmap = gmap_alloc(current->mm); + vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); if (!vcpu->arch.gmap) return -ENOMEM; vcpu->arch.gmap->private = vcpu->kvm; @@ -546,19 +553,12 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | KVM_SYNC_GPRS | KVM_SYNC_ACRS | - KVM_SYNC_CRS; + KVM_SYNC_CRS | + KVM_SYNC_ARCH0 | + KVM_SYNC_PFAULT; return 0; } -void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) -{ - /* Nothing todo */ -} - -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ -} - void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { save_fp_ctl(&vcpu->arch.host_fpregs.fpc); @@ -611,6 +611,14 @@ int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) return 0; } +static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) +{ + if (!test_vfacility(76)) + return; + + vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; +} + void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) { free_page(vcpu->arch.sie_block->cbrlo); @@ -657,6 +665,9 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; get_cpu_id(&vcpu->arch.cpu_id); vcpu->arch.cpu_id.version = 0xff; + + kvm_s390_vcpu_crypto_setup(vcpu); + return rc; } @@ -1053,6 +1064,11 @@ retry: goto retry; } + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { + vcpu->arch.sie_block->ihcpu = 0xffff; + goto retry; + } + if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { if (!ibs_enabled(vcpu)) { trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); @@ -1089,18 +1105,8 @@ retry: */ long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) { - struct mm_struct *mm = current->mm; - hva_t hva; - long rc; - - hva = gmap_fault(gpa, vcpu->arch.gmap); - if (IS_ERR_VALUE(hva)) - return (long)hva; - down_read(&mm->mmap_sem); - rc = get_user_pages(current, mm, hva, 1, writable, 0, NULL, NULL); - up_read(&mm->mmap_sem); - - return rc < 0 ? rc : 0; + return gmap_fault(vcpu->arch.gmap, gpa, + writable ? FAULT_FLAG_WRITE : 0); } static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, @@ -1195,8 +1201,11 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu) if (test_cpu_flag(CIF_MCCK_PENDING)) s390_handle_mcck(); - if (!kvm_is_ucontrol(vcpu->kvm)) - kvm_s390_deliver_pending_interrupts(vcpu); + if (!kvm_is_ucontrol(vcpu->kvm)) { + rc = kvm_s390_deliver_pending_interrupts(vcpu); + if (rc) + return rc; + } rc = kvm_s390_handle_requests(vcpu); if (rc) @@ -1300,6 +1309,48 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) return rc; } +static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; + vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; + if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) + kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); + if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { + memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); + /* some control register changes require a tlb flush */ + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); + } + if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { + vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; + vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; + vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; + vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; + vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; + } + if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { + vcpu->arch.pfault_token = kvm_run->s.regs.pft; + vcpu->arch.pfault_select = kvm_run->s.regs.pfs; + vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; + } + kvm_run->kvm_dirty_regs = 0; +} + +static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; + kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; + kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); + memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); + kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; + kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; + kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; + kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; + kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; + kvm_run->s.regs.pft = vcpu->arch.pfault_token; + kvm_run->s.regs.pfs = vcpu->arch.pfault_select; + kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; +} + int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { int rc; @@ -1321,30 +1372,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return -EINVAL; } - switch (kvm_run->exit_reason) { - case KVM_EXIT_S390_SIEIC: - case KVM_EXIT_UNKNOWN: - case KVM_EXIT_INTR: - case KVM_EXIT_S390_RESET: - case KVM_EXIT_S390_UCONTROL: - case KVM_EXIT_S390_TSCH: - case KVM_EXIT_DEBUG: - break; - default: - BUG(); - } - - vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; - vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; - if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { - kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; - kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); - } - if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { - kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; - memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); - kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); - } + sync_regs(vcpu, kvm_run); might_fault(); rc = __vcpu_run(vcpu); @@ -1374,10 +1402,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) rc = 0; } - kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; - kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; - kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); - memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); + store_regs(vcpu, kvm_run); if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &sigsaved, NULL); @@ -1506,7 +1531,7 @@ void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) * Another VCPU might have used IBS while we were offline. * Let's play safe and flush the VCPU at startup. */ - vcpu->arch.sie_block->ihcpu = 0xffff; + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); spin_unlock(&vcpu->kvm->arch.start_stop_lock); return; } @@ -1661,9 +1686,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp, } #endif case KVM_S390_VCPU_FAULT: { - r = gmap_fault(arg, vcpu->arch.gmap); - if (!IS_ERR_VALUE(r)) - r = 0; + r = gmap_fault(vcpu->arch.gmap, arg, 0); break; } case KVM_ENABLE_CAP: @@ -1694,21 +1717,12 @@ int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) return VM_FAULT_SIGBUS; } -void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, - struct kvm_memory_slot *dont) -{ -} - int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned long npages) { return 0; } -void kvm_arch_memslots_updated(struct kvm *kvm) -{ -} - /* Section: memory related */ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, @@ -1754,15 +1768,6 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, return; } -void kvm_arch_flush_shadow_all(struct kvm *kvm) -{ -} - -void kvm_arch_flush_shadow_memslot(struct kvm *kvm, - struct kvm_memory_slot *slot) -{ -} - static int __init kvm_s390_init(void) { int ret; diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 3862fa2cefe..244d0230318 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -70,7 +70,7 @@ static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) { vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; - vcpu->arch.sie_block->ihcpu = 0xffff; + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); } @@ -138,8 +138,7 @@ static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); -void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); -void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu); +int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); void kvm_s390_clear_float_irqs(struct kvm *kvm); int __must_check kvm_s390_inject_vm(struct kvm *kvm, @@ -228,6 +227,7 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); int psw_extint_disabled(struct kvm_vcpu *vcpu); void kvm_s390_destroy_adapters(struct kvm *kvm); int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu); +extern struct kvm_device_ops kvm_flic_ops; /* implemented in guestdbg.c */ void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index f89c1cd6775..72bb2dd8b9c 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -352,13 +352,6 @@ static int handle_stfl(struct kvm_vcpu *vcpu) return 0; } -static void handle_new_psw(struct kvm_vcpu *vcpu) -{ - /* Check whether the new psw is enabled for machine checks. */ - if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK) - kvm_s390_deliver_pending_machine_checks(vcpu); -} - #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA) #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL #define PSW_ADDR_24 0x0000000000ffffffUL @@ -405,7 +398,6 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu) gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE; if (!is_valid_psw(gpsw)) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); - handle_new_psw(vcpu); return 0; } @@ -427,7 +419,6 @@ static int handle_lpswe(struct kvm_vcpu *vcpu) vcpu->arch.sie_block->gpsw = new_psw; if (!is_valid_psw(&vcpu->arch.sie_block->gpsw)) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); - handle_new_psw(vcpu); return 0; } @@ -738,7 +729,7 @@ static int handle_essa(struct kvm_vcpu *vcpu) /* invalid entry */ break; /* try to free backing */ - __gmap_zap(cbrle, gmap); + __gmap_zap(gmap, cbrle); } up_read(&gmap->mm->mmap_sem); if (i < entries) diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 3f3b35403d0..a2b81d6ce8a 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -442,18 +442,15 @@ static inline int do_exception(struct pt_regs *regs, int access) down_read(&mm->mmap_sem); #ifdef CONFIG_PGSTE - gmap = (struct gmap *) - ((current->flags & PF_VCPU) ? S390_lowcore.gmap : 0); + gmap = (current->flags & PF_VCPU) ? + (struct gmap *) S390_lowcore.gmap : NULL; if (gmap) { - address = __gmap_fault(address, gmap); + current->thread.gmap_addr = address; + address = __gmap_translate(gmap, address); if (address == -EFAULT) { fault = VM_FAULT_BADMAP; goto out_up; } - if (address == -ENOMEM) { - fault = VM_FAULT_OOM; - goto out_up; - } if (gmap->pfault_enabled) flags |= FAULT_FLAG_RETRY_NOWAIT; } @@ -530,6 +527,20 @@ retry: goto retry; } } +#ifdef CONFIG_PGSTE + if (gmap) { + address = __gmap_link(gmap, current->thread.gmap_addr, + address); + if (address == -EFAULT) { + fault = VM_FAULT_BADMAP; + goto out_up; + } + if (address == -ENOMEM) { + fault = VM_FAULT_OOM; + goto out_up; + } + } +#endif fault = 0; out_up: up_read(&mm->mmap_sem); diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 19daa53a3da..296b61a4af5 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -145,30 +145,56 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit) /** * gmap_alloc - allocate a guest address space * @mm: pointer to the parent mm_struct + * @limit: maximum size of the gmap address space * * Returns a guest address space structure. */ -struct gmap *gmap_alloc(struct mm_struct *mm) +struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit) { struct gmap *gmap; struct page *page; unsigned long *table; - + unsigned long etype, atype; + + if (limit < (1UL << 31)) { + limit = (1UL << 31) - 1; + atype = _ASCE_TYPE_SEGMENT; + etype = _SEGMENT_ENTRY_EMPTY; + } else if (limit < (1UL << 42)) { + limit = (1UL << 42) - 1; + atype = _ASCE_TYPE_REGION3; + etype = _REGION3_ENTRY_EMPTY; + } else if (limit < (1UL << 53)) { + limit = (1UL << 53) - 1; + atype = _ASCE_TYPE_REGION2; + etype = _REGION2_ENTRY_EMPTY; + } else { + limit = -1UL; + atype = _ASCE_TYPE_REGION1; + etype = _REGION1_ENTRY_EMPTY; + } gmap = kzalloc(sizeof(struct gmap), GFP_KERNEL); if (!gmap) goto out; INIT_LIST_HEAD(&gmap->crst_list); + INIT_RADIX_TREE(&gmap->guest_to_host, GFP_KERNEL); + INIT_RADIX_TREE(&gmap->host_to_guest, GFP_ATOMIC); + spin_lock_init(&gmap->guest_table_lock); gmap->mm = mm; page = alloc_pages(GFP_KERNEL, ALLOC_ORDER); if (!page) goto out_free; + page->index = 0; list_add(&page->lru, &gmap->crst_list); table = (unsigned long *) page_to_phys(page); - crst_table_init(table, _REGION1_ENTRY_EMPTY); + crst_table_init(table, etype); gmap->table = table; - gmap->asce = _ASCE_TYPE_REGION1 | _ASCE_TABLE_LENGTH | - _ASCE_USER_BITS | __pa(table); + gmap->asce = atype | _ASCE_TABLE_LENGTH | + _ASCE_USER_BITS | __pa(table); + gmap->asce_end = limit; + down_write(&mm->mmap_sem); list_add(&gmap->list, &mm->context.gmap_list); + up_write(&mm->mmap_sem); return gmap; out_free: @@ -178,36 +204,38 @@ out: } EXPORT_SYMBOL_GPL(gmap_alloc); -static int gmap_unlink_segment(struct gmap *gmap, unsigned long *table) -{ - struct gmap_pgtable *mp; - struct gmap_rmap *rmap; - struct page *page; - - if (*table & _SEGMENT_ENTRY_INVALID) - return 0; - page = pfn_to_page(*table >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - list_for_each_entry(rmap, &mp->mapper, list) { - if (rmap->entry != table) - continue; - list_del(&rmap->list); - kfree(rmap); - break; - } - *table = mp->vmaddr | _SEGMENT_ENTRY_INVALID | _SEGMENT_ENTRY_PROTECT; - return 1; -} - static void gmap_flush_tlb(struct gmap *gmap) { if (MACHINE_HAS_IDTE) - __tlb_flush_asce(gmap->mm, (unsigned long) gmap->table | - _ASCE_TYPE_REGION1); + __tlb_flush_asce(gmap->mm, gmap->asce); else __tlb_flush_global(); } +static void gmap_radix_tree_free(struct radix_tree_root *root) +{ + struct radix_tree_iter iter; + unsigned long indices[16]; + unsigned long index; + void **slot; + int i, nr; + + /* A radix tree is freed by deleting all of its entries */ + index = 0; + do { + nr = 0; + radix_tree_for_each_slot(slot, root, &iter, index) { + indices[nr] = iter.index; + if (++nr == 16) + break; + } + for (i = 0; i < nr; i++) { + index = indices[i]; + radix_tree_delete(root, index); + } + } while (nr > 0); +} + /** * gmap_free - free a guest address space * @gmap: pointer to the guest address space structure @@ -215,31 +243,21 @@ static void gmap_flush_tlb(struct gmap *gmap) void gmap_free(struct gmap *gmap) { struct page *page, *next; - unsigned long *table; - int i; - /* Flush tlb. */ if (MACHINE_HAS_IDTE) - __tlb_flush_asce(gmap->mm, (unsigned long) gmap->table | - _ASCE_TYPE_REGION1); + __tlb_flush_asce(gmap->mm, gmap->asce); else __tlb_flush_global(); /* Free all segment & region tables. */ - down_read(&gmap->mm->mmap_sem); - spin_lock(&gmap->mm->page_table_lock); - list_for_each_entry_safe(page, next, &gmap->crst_list, lru) { - table = (unsigned long *) page_to_phys(page); - if ((*table & _REGION_ENTRY_TYPE_MASK) == 0) - /* Remove gmap rmap structures for segment table. */ - for (i = 0; i < PTRS_PER_PMD; i++, table++) - gmap_unlink_segment(gmap, table); + list_for_each_entry_safe(page, next, &gmap->crst_list, lru) __free_pages(page, ALLOC_ORDER); - } - spin_unlock(&gmap->mm->page_table_lock); - up_read(&gmap->mm->mmap_sem); + gmap_radix_tree_free(&gmap->guest_to_host); + gmap_radix_tree_free(&gmap->host_to_guest); + down_write(&gmap->mm->mmap_sem); list_del(&gmap->list); + up_write(&gmap->mm->mmap_sem); kfree(gmap); } EXPORT_SYMBOL_GPL(gmap_free); @@ -267,42 +285,97 @@ EXPORT_SYMBOL_GPL(gmap_disable); /* * gmap_alloc_table is assumed to be called with mmap_sem held */ -static int gmap_alloc_table(struct gmap *gmap, - unsigned long *table, unsigned long init) - __releases(&gmap->mm->page_table_lock) - __acquires(&gmap->mm->page_table_lock) +static int gmap_alloc_table(struct gmap *gmap, unsigned long *table, + unsigned long init, unsigned long gaddr) { struct page *page; unsigned long *new; /* since we dont free the gmap table until gmap_free we can unlock */ - spin_unlock(&gmap->mm->page_table_lock); page = alloc_pages(GFP_KERNEL, ALLOC_ORDER); - spin_lock(&gmap->mm->page_table_lock); if (!page) return -ENOMEM; new = (unsigned long *) page_to_phys(page); crst_table_init(new, init); + spin_lock(&gmap->mm->page_table_lock); if (*table & _REGION_ENTRY_INVALID) { list_add(&page->lru, &gmap->crst_list); *table = (unsigned long) new | _REGION_ENTRY_LENGTH | (*table & _REGION_ENTRY_TYPE_MASK); - } else + page->index = gaddr; + page = NULL; + } + spin_unlock(&gmap->mm->page_table_lock); + if (page) __free_pages(page, ALLOC_ORDER); return 0; } /** + * __gmap_segment_gaddr - find virtual address from segment pointer + * @entry: pointer to a segment table entry in the guest address space + * + * Returns the virtual address in the guest address space for the segment + */ +static unsigned long __gmap_segment_gaddr(unsigned long *entry) +{ + struct page *page; + unsigned long offset; + + offset = (unsigned long) entry / sizeof(unsigned long); + offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE; + page = pmd_to_page((pmd_t *) entry); + return page->index + offset; +} + +/** + * __gmap_unlink_by_vmaddr - unlink a single segment via a host address + * @gmap: pointer to the guest address space structure + * @vmaddr: address in the host process address space + * + * Returns 1 if a TLB flush is required + */ +static int __gmap_unlink_by_vmaddr(struct gmap *gmap, unsigned long vmaddr) +{ + unsigned long *entry; + int flush = 0; + + spin_lock(&gmap->guest_table_lock); + entry = radix_tree_delete(&gmap->host_to_guest, vmaddr >> PMD_SHIFT); + if (entry) { + flush = (*entry != _SEGMENT_ENTRY_INVALID); + *entry = _SEGMENT_ENTRY_INVALID; + } + spin_unlock(&gmap->guest_table_lock); + return flush; +} + +/** + * __gmap_unmap_by_gaddr - unmap a single segment via a guest address + * @gmap: pointer to the guest address space structure + * @gaddr: address in the guest address space + * + * Returns 1 if a TLB flush is required + */ +static int __gmap_unmap_by_gaddr(struct gmap *gmap, unsigned long gaddr) +{ + unsigned long vmaddr; + + vmaddr = (unsigned long) radix_tree_delete(&gmap->guest_to_host, + gaddr >> PMD_SHIFT); + return vmaddr ? __gmap_unlink_by_vmaddr(gmap, vmaddr) : 0; +} + +/** * gmap_unmap_segment - unmap segment from the guest address space * @gmap: pointer to the guest address space structure - * @addr: address in the guest address space + * @to: address in the guest address space * @len: length of the memory area to unmap * * Returns 0 if the unmap succeeded, -EINVAL if not. */ int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len) { - unsigned long *table; unsigned long off; int flush; @@ -312,31 +385,10 @@ int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len) return -EINVAL; flush = 0; - down_read(&gmap->mm->mmap_sem); - spin_lock(&gmap->mm->page_table_lock); - for (off = 0; off < len; off += PMD_SIZE) { - /* Walk the guest addr space page table */ - table = gmap->table + (((to + off) >> 53) & 0x7ff); - if (*table & _REGION_ENTRY_INVALID) - goto out; - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 42) & 0x7ff); - if (*table & _REGION_ENTRY_INVALID) - goto out; - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 31) & 0x7ff); - if (*table & _REGION_ENTRY_INVALID) - goto out; - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 20) & 0x7ff); - - /* Clear segment table entry in guest address space. */ - flush |= gmap_unlink_segment(gmap, table); - *table = _SEGMENT_ENTRY_INVALID; - } -out: - spin_unlock(&gmap->mm->page_table_lock); - up_read(&gmap->mm->mmap_sem); + down_write(&gmap->mm->mmap_sem); + for (off = 0; off < len; off += PMD_SIZE) + flush |= __gmap_unmap_by_gaddr(gmap, to + off); + up_write(&gmap->mm->mmap_sem); if (flush) gmap_flush_tlb(gmap); return 0; @@ -348,87 +400,47 @@ EXPORT_SYMBOL_GPL(gmap_unmap_segment); * @gmap: pointer to the guest address space structure * @from: source address in the parent address space * @to: target address in the guest address space + * @len: length of the memory area to map * * Returns 0 if the mmap succeeded, -EINVAL or -ENOMEM if not. */ int gmap_map_segment(struct gmap *gmap, unsigned long from, unsigned long to, unsigned long len) { - unsigned long *table; unsigned long off; int flush; if ((from | to | len) & (PMD_SIZE - 1)) return -EINVAL; - if (len == 0 || from + len > TASK_MAX_SIZE || - from + len < from || to + len < to) + if (len == 0 || from + len < from || to + len < to || + from + len > TASK_MAX_SIZE || to + len > gmap->asce_end) return -EINVAL; flush = 0; - down_read(&gmap->mm->mmap_sem); - spin_lock(&gmap->mm->page_table_lock); + down_write(&gmap->mm->mmap_sem); for (off = 0; off < len; off += PMD_SIZE) { - /* Walk the gmap address space page table */ - table = gmap->table + (((to + off) >> 53) & 0x7ff); - if ((*table & _REGION_ENTRY_INVALID) && - gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY)) - goto out_unmap; - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 42) & 0x7ff); - if ((*table & _REGION_ENTRY_INVALID) && - gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY)) - goto out_unmap; - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 31) & 0x7ff); - if ((*table & _REGION_ENTRY_INVALID) && - gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY)) - goto out_unmap; - table = (unsigned long *) (*table & _REGION_ENTRY_ORIGIN); - table = table + (((to + off) >> 20) & 0x7ff); - - /* Store 'from' address in an invalid segment table entry. */ - flush |= gmap_unlink_segment(gmap, table); - *table = (from + off) | (_SEGMENT_ENTRY_INVALID | - _SEGMENT_ENTRY_PROTECT); + /* Remove old translation */ + flush |= __gmap_unmap_by_gaddr(gmap, to + off); + /* Store new translation */ + if (radix_tree_insert(&gmap->guest_to_host, + (to + off) >> PMD_SHIFT, + (void *) from + off)) + break; } - spin_unlock(&gmap->mm->page_table_lock); - up_read(&gmap->mm->mmap_sem); + up_write(&gmap->mm->mmap_sem); if (flush) gmap_flush_tlb(gmap); - return 0; - -out_unmap: - spin_unlock(&gmap->mm->page_table_lock); - up_read(&gmap->mm->mmap_sem); + if (off >= len) + return 0; gmap_unmap_segment(gmap, to, len); return -ENOMEM; } EXPORT_SYMBOL_GPL(gmap_map_segment); -static unsigned long *gmap_table_walk(unsigned long address, struct gmap *gmap) -{ - unsigned long *table; - - table = gmap->table + ((address >> 53) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) - return ERR_PTR(-EFAULT); - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 42) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) - return ERR_PTR(-EFAULT); - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 31) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) - return ERR_PTR(-EFAULT); - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 20) & 0x7ff); - return table; -} - /** * __gmap_translate - translate a guest address to a user space address - * @address: guest address * @gmap: pointer to guest mapping meta data structure + * @gaddr: guest address * * Returns user space address which corresponds to the guest address or * -EFAULT if no such mapping exists. @@ -436,168 +448,161 @@ static unsigned long *gmap_table_walk(unsigned long address, struct gmap *gmap) * The mmap_sem of the mm that belongs to the address space must be held * when this function gets called. */ -unsigned long __gmap_translate(unsigned long address, struct gmap *gmap) +unsigned long __gmap_translate(struct gmap *gmap, unsigned long gaddr) { - unsigned long *segment_ptr, vmaddr, segment; - struct gmap_pgtable *mp; - struct page *page; + unsigned long vmaddr; - current->thread.gmap_addr = address; - segment_ptr = gmap_table_walk(address, gmap); - if (IS_ERR(segment_ptr)) - return PTR_ERR(segment_ptr); - /* Convert the gmap address to an mm address. */ - segment = *segment_ptr; - if (!(segment & _SEGMENT_ENTRY_INVALID)) { - page = pfn_to_page(segment >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - return mp->vmaddr | (address & ~PMD_MASK); - } else if (segment & _SEGMENT_ENTRY_PROTECT) { - vmaddr = segment & _SEGMENT_ENTRY_ORIGIN; - return vmaddr | (address & ~PMD_MASK); - } - return -EFAULT; + vmaddr = (unsigned long) + radix_tree_lookup(&gmap->guest_to_host, gaddr >> PMD_SHIFT); + return vmaddr ? (vmaddr | (gaddr & ~PMD_MASK)) : -EFAULT; } EXPORT_SYMBOL_GPL(__gmap_translate); /** * gmap_translate - translate a guest address to a user space address - * @address: guest address * @gmap: pointer to guest mapping meta data structure + * @gaddr: guest address * * Returns user space address which corresponds to the guest address or * -EFAULT if no such mapping exists. * This function does not establish potentially missing page table entries. */ -unsigned long gmap_translate(unsigned long address, struct gmap *gmap) +unsigned long gmap_translate(struct gmap *gmap, unsigned long gaddr) { unsigned long rc; down_read(&gmap->mm->mmap_sem); - rc = __gmap_translate(address, gmap); + rc = __gmap_translate(gmap, gaddr); up_read(&gmap->mm->mmap_sem); return rc; } EXPORT_SYMBOL_GPL(gmap_translate); -static int gmap_connect_pgtable(unsigned long address, unsigned long segment, - unsigned long *segment_ptr, struct gmap *gmap) +/** + * gmap_unlink - disconnect a page table from the gmap shadow tables + * @gmap: pointer to guest mapping meta data structure + * @table: pointer to the host page table + * @vmaddr: vm address associated with the host page table + */ +static void gmap_unlink(struct mm_struct *mm, unsigned long *table, + unsigned long vmaddr) +{ + struct gmap *gmap; + int flush; + + list_for_each_entry(gmap, &mm->context.gmap_list, list) { + flush = __gmap_unlink_by_vmaddr(gmap, vmaddr); + if (flush) + gmap_flush_tlb(gmap); + } +} + +/** + * gmap_link - set up shadow page tables to connect a host to a guest address + * @gmap: pointer to guest mapping meta data structure + * @gaddr: guest address + * @vmaddr: vm address + * + * Returns 0 on success, -ENOMEM for out of memory conditions, and -EFAULT + * if the vm address is already mapped to a different guest segment. + * The mmap_sem of the mm that belongs to the address space must be held + * when this function gets called. + */ +int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr) { - unsigned long vmaddr; - struct vm_area_struct *vma; - struct gmap_pgtable *mp; - struct gmap_rmap *rmap; struct mm_struct *mm; - struct page *page; + unsigned long *table; + spinlock_t *ptl; pgd_t *pgd; pud_t *pud; pmd_t *pmd; + int rc; - mm = gmap->mm; - vmaddr = segment & _SEGMENT_ENTRY_ORIGIN; - vma = find_vma(mm, vmaddr); - if (!vma || vma->vm_start > vmaddr) - return -EFAULT; + /* Create higher level tables in the gmap page table */ + table = gmap->table; + if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION1) { + table += (gaddr >> 53) & 0x7ff; + if ((*table & _REGION_ENTRY_INVALID) && + gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY, + gaddr & 0xffe0000000000000)) + return -ENOMEM; + table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); + } + if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION2) { + table += (gaddr >> 42) & 0x7ff; + if ((*table & _REGION_ENTRY_INVALID) && + gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY, + gaddr & 0xfffffc0000000000)) + return -ENOMEM; + table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); + } + if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION3) { + table += (gaddr >> 31) & 0x7ff; + if ((*table & _REGION_ENTRY_INVALID) && + gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY, + gaddr & 0xffffffff80000000)) + return -ENOMEM; + table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); + } + table += (gaddr >> 20) & 0x7ff; /* Walk the parent mm page table */ + mm = gmap->mm; pgd = pgd_offset(mm, vmaddr); - pud = pud_alloc(mm, pgd, vmaddr); - if (!pud) - return -ENOMEM; - pmd = pmd_alloc(mm, pud, vmaddr); - if (!pmd) - return -ENOMEM; - if (!pmd_present(*pmd) && - __pte_alloc(mm, vma, pmd, vmaddr)) - return -ENOMEM; + VM_BUG_ON(pgd_none(*pgd)); + pud = pud_offset(pgd, vmaddr); + VM_BUG_ON(pud_none(*pud)); + pmd = pmd_offset(pud, vmaddr); + VM_BUG_ON(pmd_none(*pmd)); /* large pmds cannot yet be handled */ if (pmd_large(*pmd)) return -EFAULT; - /* pmd now points to a valid segment table entry. */ - rmap = kmalloc(sizeof(*rmap), GFP_KERNEL|__GFP_REPEAT); - if (!rmap) - return -ENOMEM; /* Link gmap segment table entry location to page table. */ - page = pmd_page(*pmd); - mp = (struct gmap_pgtable *) page->index; - rmap->gmap = gmap; - rmap->entry = segment_ptr; - rmap->vmaddr = address & PMD_MASK; - spin_lock(&mm->page_table_lock); - if (*segment_ptr == segment) { - list_add(&rmap->list, &mp->mapper); - /* Set gmap segment table entry to page table. */ - *segment_ptr = pmd_val(*pmd) & PAGE_MASK; - rmap = NULL; - } - spin_unlock(&mm->page_table_lock); - kfree(rmap); - return 0; -} - -static void gmap_disconnect_pgtable(struct mm_struct *mm, unsigned long *table) -{ - struct gmap_rmap *rmap, *next; - struct gmap_pgtable *mp; - struct page *page; - int flush; - - flush = 0; - spin_lock(&mm->page_table_lock); - page = pfn_to_page(__pa(table) >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - list_for_each_entry_safe(rmap, next, &mp->mapper, list) { - *rmap->entry = mp->vmaddr | (_SEGMENT_ENTRY_INVALID | - _SEGMENT_ENTRY_PROTECT); - list_del(&rmap->list); - kfree(rmap); - flush = 1; - } - spin_unlock(&mm->page_table_lock); - if (flush) - __tlb_flush_global(); + rc = radix_tree_preload(GFP_KERNEL); + if (rc) + return rc; + ptl = pmd_lock(mm, pmd); + spin_lock(&gmap->guest_table_lock); + if (*table == _SEGMENT_ENTRY_INVALID) { + rc = radix_tree_insert(&gmap->host_to_guest, + vmaddr >> PMD_SHIFT, table); + if (!rc) + *table = pmd_val(*pmd); + } else + rc = 0; + spin_unlock(&gmap->guest_table_lock); + spin_unlock(ptl); + radix_tree_preload_end(); + return rc; } -/* - * this function is assumed to be called with mmap_sem held +/** + * gmap_fault - resolve a fault on a guest address + * @gmap: pointer to guest mapping meta data structure + * @gaddr: guest address + * @fault_flags: flags to pass down to handle_mm_fault() + * + * Returns 0 on success, -ENOMEM for out of memory conditions, and -EFAULT + * if the vm address is already mapped to a different guest segment. */ -unsigned long __gmap_fault(unsigned long address, struct gmap *gmap) +int gmap_fault(struct gmap *gmap, unsigned long gaddr, + unsigned int fault_flags) { - unsigned long *segment_ptr, segment; - struct gmap_pgtable *mp; - struct page *page; + unsigned long vmaddr; int rc; - current->thread.gmap_addr = address; - segment_ptr = gmap_table_walk(address, gmap); - if (IS_ERR(segment_ptr)) - return -EFAULT; - /* Convert the gmap address to an mm address. */ - while (1) { - segment = *segment_ptr; - if (!(segment & _SEGMENT_ENTRY_INVALID)) { - /* Page table is present */ - page = pfn_to_page(segment >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - return mp->vmaddr | (address & ~PMD_MASK); - } - if (!(segment & _SEGMENT_ENTRY_PROTECT)) - /* Nothing mapped in the gmap address space. */ - break; - rc = gmap_connect_pgtable(address, segment, segment_ptr, gmap); - if (rc) - return rc; - } - return -EFAULT; -} - -unsigned long gmap_fault(unsigned long address, struct gmap *gmap) -{ - unsigned long rc; - down_read(&gmap->mm->mmap_sem); - rc = __gmap_fault(address, gmap); + vmaddr = __gmap_translate(gmap, gaddr); + if (IS_ERR_VALUE(vmaddr)) { + rc = vmaddr; + goto out_up; + } + if (fixup_user_fault(current, gmap->mm, vmaddr, fault_flags)) { + rc = -EFAULT; + goto out_up; + } + rc = __gmap_link(gmap, gaddr, vmaddr); +out_up: up_read(&gmap->mm->mmap_sem); - return rc; } EXPORT_SYMBOL_GPL(gmap_fault); @@ -617,17 +622,24 @@ static void gmap_zap_swap_entry(swp_entry_t entry, struct mm_struct *mm) free_swap_and_cache(entry); } -/** - * The mm->mmap_sem lock must be held +/* + * this function is assumed to be called with mmap_sem held */ -static void gmap_zap_unused(struct mm_struct *mm, unsigned long address) +void __gmap_zap(struct gmap *gmap, unsigned long gaddr) { - unsigned long ptev, pgstev; + unsigned long vmaddr, ptev, pgstev; + pte_t *ptep, pte; spinlock_t *ptl; pgste_t pgste; - pte_t *ptep, pte; - ptep = get_locked_pte(mm, address, &ptl); + /* Find the vm address for the guest address */ + vmaddr = (unsigned long) radix_tree_lookup(&gmap->guest_to_host, + gaddr >> PMD_SHIFT); + if (!vmaddr) + return; + vmaddr |= gaddr & ~PMD_MASK; + /* Get pointer to the page table entry */ + ptep = get_locked_pte(gmap->mm, vmaddr, &ptl); if (unlikely(!ptep)) return; pte = *ptep; @@ -639,87 +651,34 @@ static void gmap_zap_unused(struct mm_struct *mm, unsigned long address) ptev = pte_val(pte); if (((pgstev & _PGSTE_GPS_USAGE_MASK) == _PGSTE_GPS_USAGE_UNUSED) || ((pgstev & _PGSTE_GPS_ZERO) && (ptev & _PAGE_INVALID))) { - gmap_zap_swap_entry(pte_to_swp_entry(pte), mm); - pte_clear(mm, address, ptep); + gmap_zap_swap_entry(pte_to_swp_entry(pte), gmap->mm); + pte_clear(gmap->mm, vmaddr, ptep); } pgste_set_unlock(ptep, pgste); out_pte: pte_unmap_unlock(*ptep, ptl); } - -/* - * this function is assumed to be called with mmap_sem held - */ -void __gmap_zap(unsigned long address, struct gmap *gmap) -{ - unsigned long *table, *segment_ptr; - unsigned long segment, pgstev, ptev; - struct gmap_pgtable *mp; - struct page *page; - - segment_ptr = gmap_table_walk(address, gmap); - if (IS_ERR(segment_ptr)) - return; - segment = *segment_ptr; - if (segment & _SEGMENT_ENTRY_INVALID) - return; - page = pfn_to_page(segment >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - address = mp->vmaddr | (address & ~PMD_MASK); - /* Page table is present */ - table = (unsigned long *)(segment & _SEGMENT_ENTRY_ORIGIN); - table = table + ((address >> 12) & 0xff); - pgstev = table[PTRS_PER_PTE]; - ptev = table[0]; - /* quick check, checked again with locks held */ - if (((pgstev & _PGSTE_GPS_USAGE_MASK) == _PGSTE_GPS_USAGE_UNUSED) || - ((pgstev & _PGSTE_GPS_ZERO) && (ptev & _PAGE_INVALID))) - gmap_zap_unused(gmap->mm, address); -} EXPORT_SYMBOL_GPL(__gmap_zap); -void gmap_discard(unsigned long from, unsigned long to, struct gmap *gmap) +void gmap_discard(struct gmap *gmap, unsigned long from, unsigned long to) { - - unsigned long *table, address, size; + unsigned long gaddr, vmaddr, size; struct vm_area_struct *vma; - struct gmap_pgtable *mp; - struct page *page; down_read(&gmap->mm->mmap_sem); - address = from; - while (address < to) { - /* Walk the gmap address space page table */ - table = gmap->table + ((address >> 53) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) { - address = (address + PMD_SIZE) & PMD_MASK; - continue; - } - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 42) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) { - address = (address + PMD_SIZE) & PMD_MASK; + for (gaddr = from; gaddr < to; + gaddr = (gaddr + PMD_SIZE) & PMD_MASK) { + /* Find the vm address for the guest address */ + vmaddr = (unsigned long) + radix_tree_lookup(&gmap->guest_to_host, + gaddr >> PMD_SHIFT); + if (!vmaddr) continue; - } - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 31) & 0x7ff); - if (unlikely(*table & _REGION_ENTRY_INVALID)) { - address = (address + PMD_SIZE) & PMD_MASK; - continue; - } - table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN); - table = table + ((address >> 20) & 0x7ff); - if (unlikely(*table & _SEGMENT_ENTRY_INVALID)) { - address = (address + PMD_SIZE) & PMD_MASK; - continue; - } - page = pfn_to_page(*table >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - vma = find_vma(gmap->mm, mp->vmaddr); - size = min(to - address, PMD_SIZE - (address & ~PMD_MASK)); - zap_page_range(vma, mp->vmaddr | (address & ~PMD_MASK), - size, NULL); - address = (address + PMD_SIZE) & PMD_MASK; + vmaddr |= gaddr & ~PMD_MASK; + /* Find vma in the parent mm */ + vma = find_vma(gmap->mm, vmaddr); + size = min(to - gaddr, PMD_SIZE - (gaddr & ~PMD_MASK)); + zap_page_range(vma, vmaddr, size, NULL); } up_read(&gmap->mm->mmap_sem); } @@ -755,7 +714,7 @@ EXPORT_SYMBOL_GPL(gmap_unregister_ipte_notifier); /** * gmap_ipte_notify - mark a range of ptes for invalidation notification * @gmap: pointer to guest mapping meta data structure - * @start: virtual address in the guest address space + * @gaddr: virtual address in the guest address space * @len: size of area * * Returns 0 if for each page in the given range a gmap mapping exists and @@ -763,7 +722,7 @@ EXPORT_SYMBOL_GPL(gmap_unregister_ipte_notifier); * for one or more pages -EFAULT is returned. If no memory could be allocated * -ENOMEM is returned. This function establishes missing page table entries. */ -int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len) +int gmap_ipte_notify(struct gmap *gmap, unsigned long gaddr, unsigned long len) { unsigned long addr; spinlock_t *ptl; @@ -771,12 +730,12 @@ int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len) pgste_t pgste; int rc = 0; - if ((start & ~PAGE_MASK) || (len & ~PAGE_MASK)) + if ((gaddr & ~PAGE_MASK) || (len & ~PAGE_MASK)) return -EINVAL; down_read(&gmap->mm->mmap_sem); while (len) { /* Convert gmap address and connect the page tables */ - addr = __gmap_fault(start, gmap); + addr = __gmap_translate(gmap, gaddr); if (IS_ERR_VALUE(addr)) { rc = addr; break; @@ -786,6 +745,9 @@ int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len) rc = -EFAULT; break; } + rc = __gmap_link(gmap, gaddr, addr); + if (rc) + break; /* Walk the process page table, lock and get pte pointer */ ptep = get_locked_pte(gmap->mm, addr, &ptl); if (unlikely(!ptep)) @@ -796,7 +758,7 @@ int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len) pgste = pgste_get_lock(ptep); pgste_val(pgste) |= PGSTE_IN_BIT; pgste_set_unlock(ptep, pgste); - start += PAGE_SIZE; + gaddr += PAGE_SIZE; len -= PAGE_SIZE; } spin_unlock(ptl); @@ -809,28 +771,30 @@ EXPORT_SYMBOL_GPL(gmap_ipte_notify); /** * gmap_do_ipte_notify - call all invalidation callbacks for a specific pte. * @mm: pointer to the process mm_struct + * @addr: virtual address in the process address space * @pte: pointer to the page table entry * * This function is assumed to be called with the page table lock held * for the pte to notify. */ -void gmap_do_ipte_notify(struct mm_struct *mm, pte_t *pte) +void gmap_do_ipte_notify(struct mm_struct *mm, unsigned long vmaddr, pte_t *pte) { - unsigned long segment_offset; + unsigned long offset, gaddr; + unsigned long *table; struct gmap_notifier *nb; - struct gmap_pgtable *mp; - struct gmap_rmap *rmap; - struct page *page; + struct gmap *gmap; - segment_offset = ((unsigned long) pte) & (255 * sizeof(pte_t)); - segment_offset = segment_offset * (4096 / sizeof(pte_t)); - page = pfn_to_page(__pa(pte) >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; + offset = ((unsigned long) pte) & (255 * sizeof(pte_t)); + offset = offset * (4096 / sizeof(pte_t)); spin_lock(&gmap_notifier_lock); - list_for_each_entry(rmap, &mp->mapper, list) { + list_for_each_entry(gmap, &mm->context.gmap_list, list) { + table = radix_tree_lookup(&gmap->host_to_guest, + vmaddr >> PMD_SHIFT); + if (!table) + continue; + gaddr = __gmap_segment_gaddr(table) + offset; list_for_each_entry(nb, &gmap_notifier_list, list) - nb->notifier_call(rmap->gmap, - rmap->vmaddr + segment_offset); + nb->notifier_call(gmap, gaddr); } spin_unlock(&gmap_notifier_lock); } @@ -841,29 +805,18 @@ static inline int page_table_with_pgste(struct page *page) return atomic_read(&page->_mapcount) == 0; } -static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, - unsigned long vmaddr) +static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm) { struct page *page; unsigned long *table; - struct gmap_pgtable *mp; page = alloc_page(GFP_KERNEL|__GFP_REPEAT); if (!page) return NULL; - mp = kmalloc(sizeof(*mp), GFP_KERNEL|__GFP_REPEAT); - if (!mp) { - __free_page(page); - return NULL; - } if (!pgtable_page_ctor(page)) { - kfree(mp); __free_page(page); return NULL; } - mp->vmaddr = vmaddr & PMD_MASK; - INIT_LIST_HEAD(&mp->mapper); - page->index = (unsigned long) mp; atomic_set(&page->_mapcount, 0); table = (unsigned long *) page_to_phys(page); clear_table(table, _PAGE_INVALID, PAGE_SIZE/2); @@ -874,14 +827,10 @@ static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, static inline void page_table_free_pgste(unsigned long *table) { struct page *page; - struct gmap_pgtable *mp; page = pfn_to_page(__pa(table) >> PAGE_SHIFT); - mp = (struct gmap_pgtable *) page->index; - BUG_ON(!list_empty(&mp->mapper)); pgtable_page_dtor(page); atomic_set(&page->_mapcount, -1); - kfree(mp); __free_page(page); } @@ -986,11 +935,21 @@ int set_guest_storage_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep; down_read(&mm->mmap_sem); +retry: ptep = get_locked_pte(current->mm, addr, &ptl); if (unlikely(!ptep)) { up_read(&mm->mmap_sem); return -EFAULT; } + if (!(pte_val(*ptep) & _PAGE_INVALID) && + (pte_val(*ptep) & _PAGE_PROTECT)) { + pte_unmap_unlock(*ptep, ptl); + if (fixup_user_fault(current, mm, addr, FAULT_FLAG_WRITE)) { + up_read(&mm->mmap_sem); + return -EFAULT; + } + goto retry; + } new = old = pgste_get_lock(ptep); pgste_val(new) &= ~(PGSTE_GR_BIT | PGSTE_GC_BIT | @@ -1028,8 +987,7 @@ static inline int page_table_with_pgste(struct page *page) return 0; } -static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, - unsigned long vmaddr) +static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm) { return NULL; } @@ -1043,8 +1001,8 @@ static inline void page_table_free_pgste(unsigned long *table) { } -static inline void gmap_disconnect_pgtable(struct mm_struct *mm, - unsigned long *table) +static inline void gmap_unlink(struct mm_struct *mm, unsigned long *table, + unsigned long vmaddr) { } @@ -1064,14 +1022,14 @@ static inline unsigned int atomic_xor_bits(atomic_t *v, unsigned int bits) /* * page table entry allocation/free routines. */ -unsigned long *page_table_alloc(struct mm_struct *mm, unsigned long vmaddr) +unsigned long *page_table_alloc(struct mm_struct *mm) { unsigned long *uninitialized_var(table); struct page *uninitialized_var(page); unsigned int mask, bit; if (mm_has_pgste(mm)) - return page_table_alloc_pgste(mm, vmaddr); + return page_table_alloc_pgste(mm); /* Allocate fragments of a 4K page as 1K/2K page table */ spin_lock_bh(&mm->context.list_lock); mask = FRAG_MASK; @@ -1113,10 +1071,8 @@ void page_table_free(struct mm_struct *mm, unsigned long *table) unsigned int bit, mask; page = pfn_to_page(__pa(table) >> PAGE_SHIFT); - if (page_table_with_pgste(page)) { - gmap_disconnect_pgtable(mm, table); + if (page_table_with_pgste(page)) return page_table_free_pgste(table); - } /* Free 1K/2K page table fragment of a 4K page */ bit = 1 << ((__pa(table) & ~PAGE_MASK)/(PTRS_PER_PTE*sizeof(pte_t))); spin_lock_bh(&mm->context.list_lock); @@ -1148,7 +1104,8 @@ static void __page_table_free_rcu(void *table, unsigned bit) } } -void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table) +void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table, + unsigned long vmaddr) { struct mm_struct *mm; struct page *page; @@ -1157,7 +1114,7 @@ void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table) mm = tlb->mm; page = pfn_to_page(__pa(table) >> PAGE_SHIFT); if (page_table_with_pgste(page)) { - gmap_disconnect_pgtable(mm, table); + gmap_unlink(mm, table, vmaddr); table = (unsigned long *) (__pa(table) | FRAG_MASK); tlb_remove_table(tlb, table); return; @@ -1293,7 +1250,7 @@ again: if (page_table_with_pgste(page)) continue; /* Allocate new page table with pgstes */ - new = page_table_alloc_pgste(mm, addr); + new = page_table_alloc_pgste(mm); if (!new) return -ENOMEM; @@ -1308,7 +1265,7 @@ again: /* Establish new table */ pmd_populate(mm, pmd, (pte_t *) new); /* Free old table with rcu, there might be a walker! */ - page_table_free_rcu(tlb, table); + page_table_free_rcu(tlb, table, addr); new = NULL; } spin_unlock(ptl); diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index fe9012a49aa..fdbd7888cb0 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -65,7 +65,7 @@ static pte_t __ref *vmem_pte_alloc(unsigned long address) pte_t *pte; if (slab_is_available()) - pte = (pte_t *) page_table_alloc(&init_mm, address); + pte = (pte_t *) page_table_alloc(&init_mm); else pte = alloc_bootmem_align(PTRS_PER_PTE * sizeof(pte_t), PTRS_PER_PTE * sizeof(pte_t)); diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index ac0f90e26a0..028df8dc538 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -99,10 +99,6 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) #define ASYNC_PF_PER_VCPU 64 -struct kvm_vcpu; -struct kvm; -struct kvm_async_pf; - enum kvm_reg { VCPU_REGS_RAX = 0, VCPU_REGS_RCX = 1, @@ -266,7 +262,8 @@ struct kvm_mmu { struct x86_exception *fault); gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, struct x86_exception *exception); - gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); + gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, + struct x86_exception *exception); int (*sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp); void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); @@ -481,6 +478,7 @@ struct kvm_vcpu_arch { u64 mmio_gva; unsigned access; gfn_t mmio_gfn; + u64 mmio_gen; struct kvm_pmu pmu; @@ -580,7 +578,6 @@ struct kvm_arch { gpa_t wall_clock; - struct page *ept_identity_pagetable; bool ept_identity_pagetable_done; gpa_t ept_identity_map_addr; @@ -665,8 +662,8 @@ struct msr_data { struct kvm_x86_ops { int (*cpu_has_kvm_support)(void); /* __init */ int (*disabled_by_bios)(void); /* __init */ - int (*hardware_enable)(void *dummy); - void (*hardware_disable)(void *dummy); + int (*hardware_enable)(void); + void (*hardware_disable)(void); void (*check_processor_compatibility)(void *rtn); int (*hardware_setup)(void); /* __init */ void (*hardware_unsetup)(void); /* __exit */ @@ -896,7 +893,6 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, gfn_t gfn, void *data, int offset, int len, u32 access); -void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); static inline int __kvm_irq_line_state(unsigned long *irq_state, @@ -927,7 +923,8 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); int kvm_mmu_load(struct kvm_vcpu *vcpu); void kvm_mmu_unload(struct kvm_vcpu *vcpu); void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); -gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); +gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, + struct x86_exception *exception); gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, struct x86_exception *exception); gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, @@ -947,7 +944,8 @@ void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu); void kvm_enable_tdp(void); void kvm_disable_tdp(void); -static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) +static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, + struct x86_exception *exception) { return gpa; } diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index a5380590ab0..43b33e301e6 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -88,6 +88,14 @@ static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu) return best && (best->ecx & bit(X86_FEATURE_X2APIC)); } +static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu) +{ + struct kvm_cpuid_entry2 *best; + + best = kvm_find_cpuid_entry(vcpu, 0, 0); + return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx; +} + static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu) { struct kvm_cpuid_entry2 *best; diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index e5bf13003cd..20d91873d83 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3139,12 +3139,8 @@ static int em_clts(struct x86_emulate_ctxt *ctxt) static int em_vmcall(struct x86_emulate_ctxt *ctxt) { - int rc; - - if (ctxt->modrm_mod != 3 || ctxt->modrm_rm != 1) - return X86EMUL_UNHANDLEABLE; + int rc = ctxt->ops->fix_hypercall(ctxt); - rc = ctxt->ops->fix_hypercall(ctxt); if (rc != X86EMUL_CONTINUE) return rc; @@ -3562,6 +3558,12 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt) F2bv(((_f) | DstReg | SrcMem | ModRM) & ~Lock, _e), \ F2bv(((_f) & ~Lock) | DstAcc | SrcImm, _e) +static const struct opcode group7_rm0[] = { + N, + I(SrcNone | Priv | EmulateOnUD, em_vmcall), + N, N, N, N, N, N, +}; + static const struct opcode group7_rm1[] = { DI(SrcNone | Priv, monitor), DI(SrcNone | Priv, mwait), @@ -3655,7 +3657,7 @@ static const struct group_dual group7 = { { II(SrcMem16 | Mov | Priv, em_lmsw, lmsw), II(SrcMem | ByteOp | Priv | NoAccess, em_invlpg, invlpg), }, { - I(SrcNone | Priv | EmulateOnUD, em_vmcall), + EXT(0, group7_rm0), EXT(0, group7_rm1), N, EXT(0, group7_rm3), II(SrcNone | DstMem | Mov, em_smsw, smsw), N, @@ -3686,14 +3688,18 @@ static const struct gprefix pfx_0f_6f_0f_7f = { I(Mmx, em_mov), I(Sse | Aligned, em_mov), N, I(Sse | Unaligned, em_mov), }; -static const struct gprefix pfx_vmovntpx = { - I(0, em_mov), N, N, N, +static const struct gprefix pfx_0f_2b = { + I(0, em_mov), I(0, em_mov), N, N, }; static const struct gprefix pfx_0f_28_0f_29 = { I(Aligned, em_mov), I(Aligned, em_mov), N, N, }; +static const struct gprefix pfx_0f_e7 = { + N, I(Sse, em_mov), N, N, +}; + static const struct escape escape_d9 = { { N, N, N, N, N, N, N, I(DstMem, em_fnstcw), }, { @@ -3900,7 +3906,7 @@ static const struct opcode twobyte_table[256] = { N, N, N, N, GP(ModRM | DstReg | SrcMem | Mov | Sse, &pfx_0f_28_0f_29), GP(ModRM | DstMem | SrcReg | Mov | Sse, &pfx_0f_28_0f_29), - N, GP(ModRM | DstMem | SrcReg | Sse | Mov | Aligned, &pfx_vmovntpx), + N, GP(ModRM | DstMem | SrcReg | Mov | Sse, &pfx_0f_2b), N, N, N, N, /* 0x30 - 0x3F */ II(ImplicitOps | Priv, em_wrmsr, wrmsr), @@ -3964,7 +3970,8 @@ static const struct opcode twobyte_table[256] = { /* 0xD0 - 0xDF */ N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, /* 0xE0 - 0xEF */ - N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, + N, N, N, N, N, N, N, GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_e7), + N, N, N, N, N, N, N, N, /* 0xF0 - 0xFF */ N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N }; diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index fb919c574e2..b8345dd41b2 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -709,6 +709,8 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, int result = 0; struct kvm_vcpu *vcpu = apic->vcpu; + trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, + trig_mode, vector); switch (delivery_mode) { case APIC_DM_LOWEST: vcpu->arch.apic_arb_prio++; @@ -730,8 +732,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_vcpu_kick(vcpu); } - trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, - trig_mode, vector, false); break; case APIC_DM_REMRD: diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 931467881da..76398fe15df 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -199,16 +199,20 @@ void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask) EXPORT_SYMBOL_GPL(kvm_mmu_set_mmio_spte_mask); /* - * spte bits of bit 3 ~ bit 11 are used as low 9 bits of generation number, - * the bits of bits 52 ~ bit 61 are used as high 10 bits of generation - * number. + * the low bit of the generation number is always presumed to be zero. + * This disables mmio caching during memslot updates. The concept is + * similar to a seqcount but instead of retrying the access we just punt + * and ignore the cache. + * + * spte bits 3-11 are used as bits 1-9 of the generation number, + * the bits 52-61 are used as bits 10-19 of the generation number. */ -#define MMIO_SPTE_GEN_LOW_SHIFT 3 +#define MMIO_SPTE_GEN_LOW_SHIFT 2 #define MMIO_SPTE_GEN_HIGH_SHIFT 52 -#define MMIO_GEN_SHIFT 19 -#define MMIO_GEN_LOW_SHIFT 9 -#define MMIO_GEN_LOW_MASK ((1 << MMIO_GEN_LOW_SHIFT) - 1) +#define MMIO_GEN_SHIFT 20 +#define MMIO_GEN_LOW_SHIFT 10 +#define MMIO_GEN_LOW_MASK ((1 << MMIO_GEN_LOW_SHIFT) - 2) #define MMIO_GEN_MASK ((1 << MMIO_GEN_SHIFT) - 1) #define MMIO_MAX_GEN ((1 << MMIO_GEN_SHIFT) - 1) @@ -236,12 +240,7 @@ static unsigned int get_mmio_spte_generation(u64 spte) static unsigned int kvm_current_mmio_generation(struct kvm *kvm) { - /* - * Init kvm generation close to MMIO_MAX_GEN to easily test the - * code of handling generation number wrap-around. - */ - return (kvm_memslots(kvm)->generation + - MMIO_MAX_GEN - 150) & MMIO_GEN_MASK; + return kvm_memslots(kvm)->generation & MMIO_GEN_MASK; } static void mark_mmio_spte(struct kvm *kvm, u64 *sptep, u64 gfn, @@ -296,11 +295,6 @@ static bool check_mmio_spte(struct kvm *kvm, u64 spte) return likely(kvm_gen == spte_gen); } -static inline u64 rsvd_bits(int s, int e) -{ - return ((1ULL << (e - s + 1)) - 1) << s; -} - void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, u64 dirty_mask, u64 nx_mask, u64 x_mask) { @@ -3163,7 +3157,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu) if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) return; - vcpu_clear_mmio_info(vcpu, ~0ul); + vcpu_clear_mmio_info(vcpu, MMIO_GVA_ANY); kvm_mmu_audit(vcpu, AUDIT_PRE_SYNC); if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) { hpa_t root = vcpu->arch.mmu.root_hpa; @@ -3206,7 +3200,7 @@ static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr, { if (exception) exception->error_code = 0; - return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access); + return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access, exception); } static bool quickly_check_mmio_pf(struct kvm_vcpu *vcpu, u64 addr, bool direct) @@ -3518,6 +3512,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int maxphyaddr = cpuid_maxphyaddr(vcpu); u64 exb_bit_rsvd = 0; u64 gbpages_bit_rsvd = 0; + u64 nonleaf_bit8_rsvd = 0; context->bad_mt_xwr = 0; @@ -3525,6 +3520,14 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, exb_bit_rsvd = rsvd_bits(63, 63); if (!guest_cpuid_has_gbpages(vcpu)) gbpages_bit_rsvd = rsvd_bits(7, 7); + + /* + * Non-leaf PML4Es and PDPEs reserve bit 8 (which would be the G bit for + * leaf entries) on AMD CPUs only. + */ + if (guest_cpuid_is_amd(vcpu)) + nonleaf_bit8_rsvd = rsvd_bits(8, 8); + switch (context->root_level) { case PT32_ROOT_LEVEL: /* no rsvd bits for 2 level 4K page table entries */ @@ -3559,9 +3562,9 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, break; case PT64_ROOT_LEVEL: context->rsvd_bits_mask[0][3] = exb_bit_rsvd | - rsvd_bits(maxphyaddr, 51) | rsvd_bits(7, 7); + nonleaf_bit8_rsvd | rsvd_bits(7, 7) | rsvd_bits(maxphyaddr, 51); context->rsvd_bits_mask[0][2] = exb_bit_rsvd | - gbpages_bit_rsvd | rsvd_bits(maxphyaddr, 51); + nonleaf_bit8_rsvd | gbpages_bit_rsvd | rsvd_bits(maxphyaddr, 51); context->rsvd_bits_mask[0][1] = exb_bit_rsvd | rsvd_bits(maxphyaddr, 51); context->rsvd_bits_mask[0][0] = exb_bit_rsvd | @@ -4433,7 +4436,7 @@ void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm) * The very rare case: if the generation-number is round, * zap all shadow pages. */ - if (unlikely(kvm_current_mmio_generation(kvm) >= MMIO_MAX_GEN)) { + if (unlikely(kvm_current_mmio_generation(kvm) == 0)) { printk_ratelimited(KERN_INFO "kvm: zapping shadow pages for mmio generation wraparound\n"); kvm_mmu_invalidate_zap_all_pages(kvm); } diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index b982112d2ca..bde8ee72575 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -56,6 +56,11 @@ #define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT) #define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT) +static inline u64 rsvd_bits(int s, int e) +{ + return ((1ULL << (e - s + 1)) - 1) << s; +} + int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]); void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask); diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 41077652826..0ab6c65a282 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -321,9 +321,22 @@ retry_walk: walker->pte_gpa[walker->level - 1] = pte_gpa; real_gfn = mmu->translate_gpa(vcpu, gfn_to_gpa(table_gfn), - PFERR_USER_MASK|PFERR_WRITE_MASK); + PFERR_USER_MASK|PFERR_WRITE_MASK, + &walker->fault); + + /* + * FIXME: This can happen if emulation (for of an INS/OUTS + * instruction) triggers a nested page fault. The exit + * qualification / exit info field will incorrectly have + * "guest page access" as the nested page fault's cause, + * instead of "guest page structure access". To fix this, + * the x86_exception struct should be augmented with enough + * information to fix the exit_qualification or exit_info_1 + * fields. + */ if (unlikely(real_gfn == UNMAPPED_GVA)) - goto error; + return 0; + real_gfn = gpa_to_gfn(real_gfn); host_addr = gfn_to_hva_prot(vcpu->kvm, real_gfn, @@ -364,7 +377,7 @@ retry_walk: if (PTTYPE == 32 && walker->level == PT_DIRECTORY_LEVEL && is_cpuid_PSE36()) gfn += pse36_gfn_delta(pte); - real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn), access); + real_gpa = mmu->translate_gpa(vcpu, gfn_to_gpa(gfn), access, &walker->fault); if (real_gpa == UNMAPPED_GVA) return 0; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 1703aab84a6..f7f6a4a157a 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -622,7 +622,7 @@ static int has_svm(void) return 1; } -static void svm_hardware_disable(void *garbage) +static void svm_hardware_disable(void) { /* Make sure we clean up behind us */ if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) @@ -633,7 +633,7 @@ static void svm_hardware_disable(void *garbage) amd_pmu_disable_virt(); } -static int svm_hardware_enable(void *garbage) +static int svm_hardware_enable(void) { struct svm_cpu_data *sd; @@ -1257,7 +1257,8 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) svm->asid_generation = 0; init_vmcb(svm); - svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; + svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE | + MSR_IA32_APICBASE_ENABLE; if (kvm_vcpu_is_bsp(&svm->vcpu)) svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; @@ -1974,10 +1975,26 @@ static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, { struct vcpu_svm *svm = to_svm(vcpu); - svm->vmcb->control.exit_code = SVM_EXIT_NPF; - svm->vmcb->control.exit_code_hi = 0; - svm->vmcb->control.exit_info_1 = fault->error_code; - svm->vmcb->control.exit_info_2 = fault->address; + if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) { + /* + * TODO: track the cause of the nested page fault, and + * correctly fill in the high bits of exit_info_1. + */ + svm->vmcb->control.exit_code = SVM_EXIT_NPF; + svm->vmcb->control.exit_code_hi = 0; + svm->vmcb->control.exit_info_1 = (1ULL << 32); + svm->vmcb->control.exit_info_2 = fault->address; + } + + svm->vmcb->control.exit_info_1 &= ~0xffffffffULL; + svm->vmcb->control.exit_info_1 |= fault->error_code; + + /* + * The present bit is always zero for page structure faults on real + * hardware. + */ + if (svm->vmcb->control.exit_info_1 & (2ULL << 32)) + svm->vmcb->control.exit_info_1 &= ~1; nested_svm_vmexit(svm); } @@ -3031,7 +3048,7 @@ static int cr8_write_interception(struct vcpu_svm *svm) return 0; } -u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) +static u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) { struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu)); return vmcb->control.tsc_offset + diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index 1742dfbd26b..6b06ab8748d 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -415,15 +415,14 @@ TRACE_EVENT(kvm_apic_ipi, ); TRACE_EVENT(kvm_apic_accept_irq, - TP_PROTO(__u32 apicid, __u16 dm, __u8 tm, __u8 vec, bool coalesced), - TP_ARGS(apicid, dm, tm, vec, coalesced), + TP_PROTO(__u32 apicid, __u16 dm, __u8 tm, __u8 vec), + TP_ARGS(apicid, dm, tm, vec), TP_STRUCT__entry( __field( __u32, apicid ) __field( __u16, dm ) __field( __u8, tm ) __field( __u8, vec ) - __field( bool, coalesced ) ), TP_fast_assign( @@ -431,14 +430,12 @@ TRACE_EVENT(kvm_apic_accept_irq, __entry->dm = dm; __entry->tm = tm; __entry->vec = vec; - __entry->coalesced = coalesced; ), - TP_printk("apicid %x vec %u (%s|%s)%s", + TP_printk("apicid %x vec %u (%s|%s)", __entry->apicid, __entry->vec, __print_symbolic((__entry->dm >> 8 & 0x7), kvm_deliver_mode), - __entry->tm ? "level" : "edge", - __entry->coalesced ? " (coalesced)" : "") + __entry->tm ? "level" : "edge") ); TRACE_EVENT(kvm_eoi, @@ -848,6 +845,8 @@ TRACE_EVENT(kvm_track_tsc, __print_symbolic(__entry->host_clock, host_clocks)) ); +#endif /* CONFIG_X86_64 */ + TRACE_EVENT(kvm_ple_window, TP_PROTO(bool grow, unsigned int vcpu_id, int new, int old), TP_ARGS(grow, vcpu_id, new, old), @@ -878,8 +877,6 @@ TRACE_EVENT(kvm_ple_window, #define trace_kvm_ple_window_shrink(vcpu_id, new, old) \ trace_kvm_ple_window(false, vcpu_id, new, old) -#endif /* CONFIG_X86_64 */ - #endif /* _TRACE_KVM_H */ #undef TRACE_INCLUDE_PATH diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 661abc2f704..6ffd643d1a6 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -397,6 +397,7 @@ struct nested_vmx { * we must keep them pinned while L2 runs. */ struct page *apic_access_page; + struct page *virtual_apic_page; u64 msr_ia32_feature_control; struct hrtimer preemption_timer; @@ -555,6 +556,7 @@ static int max_shadow_read_only_fields = ARRAY_SIZE(shadow_read_only_fields); static unsigned long shadow_read_write_fields[] = { + TPR_THRESHOLD, GUEST_RIP, GUEST_RSP, GUEST_CR0, @@ -765,6 +767,7 @@ static u32 vmx_segment_access_rights(struct kvm_segment *var); static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu); static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx); static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx); +static int alloc_identity_pagetable(struct kvm *kvm); static DEFINE_PER_CPU(struct vmcs *, vmxarea); static DEFINE_PER_CPU(struct vmcs *, current_vmcs); @@ -2157,7 +2160,7 @@ static u64 guest_read_tsc(void) * Like guest_read_tsc, but always returns L1's notion of the timestamp * counter, even if a nested guest (L2) is currently running. */ -u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) +static u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) { u64 tsc_offset; @@ -2352,7 +2355,7 @@ static __init void nested_vmx_setup_ctls_msrs(void) CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING | CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_EXITING | CPU_BASED_RDPMC_EXITING | CPU_BASED_RDTSC_EXITING | - CPU_BASED_PAUSE_EXITING | + CPU_BASED_PAUSE_EXITING | CPU_BASED_TPR_SHADOW | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; /* * We can allow some features even when not supported by the @@ -2726,7 +2729,7 @@ static void kvm_cpu_vmxon(u64 addr) : "memory", "cc"); } -static int hardware_enable(void *garbage) +static int hardware_enable(void) { int cpu = raw_smp_processor_id(); u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); @@ -2790,7 +2793,7 @@ static void kvm_cpu_vmxoff(void) asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); } -static void hardware_disable(void *garbage) +static void hardware_disable(void) { if (vmm_exclusive) { vmclear_local_loaded_vmcss(); @@ -3960,21 +3963,25 @@ out: static int init_rmode_identity_map(struct kvm *kvm) { - int i, idx, r, ret; + int i, idx, r = 0; pfn_t identity_map_pfn; u32 tmp; if (!enable_ept) - return 1; - if (unlikely(!kvm->arch.ept_identity_pagetable)) { - printk(KERN_ERR "EPT: identity-mapping pagetable " - "haven't been allocated!\n"); return 0; - } + + /* Protect kvm->arch.ept_identity_pagetable_done. */ + mutex_lock(&kvm->slots_lock); + if (likely(kvm->arch.ept_identity_pagetable_done)) - return 1; - ret = 0; + goto out2; + identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; + + r = alloc_identity_pagetable(kvm); + if (r < 0) + goto out2; + idx = srcu_read_lock(&kvm->srcu); r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); if (r < 0) @@ -3989,10 +3996,13 @@ static int init_rmode_identity_map(struct kvm *kvm) goto out; } kvm->arch.ept_identity_pagetable_done = true; - ret = 1; + out: srcu_read_unlock(&kvm->srcu, idx); - return ret; + +out2: + mutex_unlock(&kvm->slots_lock); + return r; } static void seg_setup(int seg) @@ -4021,13 +4031,13 @@ static int alloc_apic_access_page(struct kvm *kvm) goto out; kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; kvm_userspace_mem.flags = 0; - kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; + kvm_userspace_mem.guest_phys_addr = APIC_DEFAULT_PHYS_BASE; kvm_userspace_mem.memory_size = PAGE_SIZE; r = __kvm_set_memory_region(kvm, &kvm_userspace_mem); if (r) goto out; - page = gfn_to_page(kvm, 0xfee00); + page = gfn_to_page(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); if (is_error_page(page)) { r = -EFAULT; goto out; @@ -4041,31 +4051,20 @@ out: static int alloc_identity_pagetable(struct kvm *kvm) { - struct page *page; + /* Called with kvm->slots_lock held. */ + struct kvm_userspace_memory_region kvm_userspace_mem; int r = 0; - mutex_lock(&kvm->slots_lock); - if (kvm->arch.ept_identity_pagetable) - goto out; + BUG_ON(kvm->arch.ept_identity_pagetable_done); + kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; kvm_userspace_mem.flags = 0; kvm_userspace_mem.guest_phys_addr = kvm->arch.ept_identity_map_addr; kvm_userspace_mem.memory_size = PAGE_SIZE; r = __kvm_set_memory_region(kvm, &kvm_userspace_mem); - if (r) - goto out; - page = gfn_to_page(kvm, kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); - if (is_error_page(page)) { - r = -EFAULT; - goto out; - } - - kvm->arch.ept_identity_pagetable = page; -out: - mutex_unlock(&kvm->slots_lock); return r; } @@ -4500,7 +4499,7 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu) vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); kvm_set_cr8(&vmx->vcpu, 0); - apic_base_msr.data = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; + apic_base_msr.data = APIC_DEFAULT_PHYS_BASE | MSR_IA32_APICBASE_ENABLE; if (kvm_vcpu_is_bsp(&vmx->vcpu)) apic_base_msr.data |= MSR_IA32_APICBASE_BSP; apic_base_msr.host_initiated = true; @@ -6244,7 +6243,11 @@ static void free_nested(struct vcpu_vmx *vmx) /* Unpin physical memory we referred to in current vmcs02 */ if (vmx->nested.apic_access_page) { nested_release_page(vmx->nested.apic_access_page); - vmx->nested.apic_access_page = 0; + vmx->nested.apic_access_page = NULL; + } + if (vmx->nested.virtual_apic_page) { + nested_release_page(vmx->nested.virtual_apic_page); + vmx->nested.virtual_apic_page = NULL; } nested_free_all_saved_vmcss(vmx); @@ -7034,7 +7037,7 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu) case EXIT_REASON_MCE_DURING_VMENTRY: return 0; case EXIT_REASON_TPR_BELOW_THRESHOLD: - return 1; + return nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW); case EXIT_REASON_APIC_ACCESS: return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); @@ -7155,6 +7158,12 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu) static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) { + struct vmcs12 *vmcs12 = get_vmcs12(vcpu); + + if (is_guest_mode(vcpu) && + nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) + return; + if (irr == -1 || tpr < irr) { vmcs_write32(TPR_THRESHOLD, 0); return; @@ -7745,10 +7754,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) if (!kvm->arch.ept_identity_map_addr) kvm->arch.ept_identity_map_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR; - err = -ENOMEM; - if (alloc_identity_pagetable(kvm) != 0) - goto free_vmcs; - if (!init_rmode_identity_map(kvm)) + err = init_rmode_identity_map(kvm); + if (err) goto free_vmcs; } @@ -7927,6 +7934,55 @@ static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu, kvm_inject_page_fault(vcpu, fault); } +static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu, + struct vmcs12 *vmcs12) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + + if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { + /* TODO: Also verify bits beyond physical address width are 0 */ + if (!PAGE_ALIGNED(vmcs12->apic_access_addr)) + return false; + + /* + * Translate L1 physical address to host physical + * address for vmcs02. Keep the page pinned, so this + * physical address remains valid. We keep a reference + * to it so we can release it later. + */ + if (vmx->nested.apic_access_page) /* shouldn't happen */ + nested_release_page(vmx->nested.apic_access_page); + vmx->nested.apic_access_page = + nested_get_page(vcpu, vmcs12->apic_access_addr); + } + + if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) { + /* TODO: Also verify bits beyond physical address width are 0 */ + if (!PAGE_ALIGNED(vmcs12->virtual_apic_page_addr)) + return false; + + if (vmx->nested.virtual_apic_page) /* shouldn't happen */ + nested_release_page(vmx->nested.virtual_apic_page); + vmx->nested.virtual_apic_page = + nested_get_page(vcpu, vmcs12->virtual_apic_page_addr); + + /* + * Failing the vm entry is _not_ what the processor does + * but it's basically the only possibility we have. + * We could still enter the guest if CR8 load exits are + * enabled, CR8 store exits are enabled, and virtualize APIC + * access is disabled; in this case the processor would never + * use the TPR shadow and we could simply clear the bit from + * the execution control. But such a configuration is useless, + * so let's keep the code simple. + */ + if (!vmx->nested.virtual_apic_page) + return false; + } + + return true; +} + static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu) { u64 preemption_timeout = get_vmcs12(vcpu)->vmx_preemption_timer_value; @@ -8073,16 +8129,6 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) { /* - * Translate L1 physical address to host physical - * address for vmcs02. Keep the page pinned, so this - * physical address remains valid. We keep a reference - * to it so we can release it later. - */ - if (vmx->nested.apic_access_page) /* shouldn't happen */ - nested_release_page(vmx->nested.apic_access_page); - vmx->nested.apic_access_page = - nested_get_page(vcpu, vmcs12->apic_access_addr); - /* * If translation failed, no matter: This feature asks * to exit when accessing the given address, and if it * can never be accessed, this feature won't do @@ -8127,6 +8173,13 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; exec_control &= ~CPU_BASED_TPR_SHADOW; exec_control |= vmcs12->cpu_based_vm_exec_control; + + if (exec_control & CPU_BASED_TPR_SHADOW) { + vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, + page_to_phys(vmx->nested.virtual_apic_page)); + vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold); + } + /* * Merging of IO and MSR bitmaps not currently supported. * Rather, exit every time. @@ -8288,8 +8341,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) return 1; } - if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) && - !PAGE_ALIGNED(vmcs12->apic_access_addr)) { + if (!nested_get_vmcs12_pages(vcpu, vmcs12)) { /*TODO: Also verify bits beyond physical address width are 0*/ nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); return 1; @@ -8893,7 +8945,11 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, /* Unpin physical memory we referred to in vmcs02 */ if (vmx->nested.apic_access_page) { nested_release_page(vmx->nested.apic_access_page); - vmx->nested.apic_access_page = 0; + vmx->nested.apic_access_page = NULL; + } + if (vmx->nested.virtual_apic_page) { + nested_release_page(vmx->nested.virtual_apic_page); + vmx->nested.virtual_apic_page = NULL; } /* @@ -8949,7 +9005,7 @@ static int vmx_check_intercept(struct kvm_vcpu *vcpu, return X86EMUL_CONTINUE; } -void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu) +static void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu) { if (ple_gap) shrink_ple_window(vcpu); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c10408ef9ab..2d7f65daa8d 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -246,7 +246,7 @@ void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) } EXPORT_SYMBOL_GPL(kvm_set_shared_msr); -static void drop_user_return_notifiers(void *ignore) +static void drop_user_return_notifiers(void) { unsigned int cpu = smp_processor_id(); struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); @@ -408,12 +408,14 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) } EXPORT_SYMBOL_GPL(kvm_inject_page_fault); -void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) +static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) { if (mmu_is_nested(vcpu) && !fault->nested_page_fault) vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); else vcpu->arch.mmu.inject_page_fault(vcpu, fault); + + return fault->nested_page_fault; } void kvm_inject_nmi(struct kvm_vcpu *vcpu) @@ -457,11 +459,12 @@ int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, gfn_t ngfn, void *data, int offset, int len, u32 access) { + struct x86_exception exception; gfn_t real_gfn; gpa_t ngpa; ngpa = gfn_to_gpa(ngfn); - real_gfn = mmu->translate_gpa(vcpu, ngpa, access); + real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); if (real_gfn == UNMAPPED_GVA) return -EFAULT; @@ -1518,7 +1521,7 @@ static void kvm_gen_update_masterclock(struct kvm *kvm) pvclock_update_vm_gtod_copy(kvm); kvm_for_each_vcpu(i, vcpu, kvm) - set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); /* guest entries allowed */ kvm_for_each_vcpu(i, vcpu, kvm) @@ -1661,7 +1664,7 @@ static void kvmclock_update_fn(struct work_struct *work) struct kvm_vcpu *vcpu; kvm_for_each_vcpu(i, vcpu, kvm) { - set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); kvm_vcpu_kick(vcpu); } } @@ -1670,7 +1673,7 @@ static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) { struct kvm *kvm = v->kvm; - set_bit(KVM_REQ_CLOCK_UPDATE, &v->requests); + kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); schedule_delayed_work(&kvm->arch.kvmclock_update_work, KVMCLOCK_UPDATE_DELAY); } @@ -1726,7 +1729,7 @@ static bool valid_mtrr_type(unsigned t) static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) { int i; - u64 mask = 0; + u64 mask; if (!msr_mtrr_valid(msr)) return false; @@ -1750,8 +1753,7 @@ static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) /* variable MTRRs */ WARN_ON(!(msr >= 0x200 && msr < 0x200 + 2 * KVM_NR_VAR_MTRR)); - for (i = 63; i > boot_cpu_data.x86_phys_bits; i--) - mask |= (1ULL << i); + mask = (~0ULL) << cpuid_maxphyaddr(vcpu); if ((msr & 1) == 0) { /* MTRR base */ if (!valid_mtrr_type(data & 0xff)) @@ -2847,7 +2849,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) if (unlikely(vcpu->arch.tsc_offset_adjustment)) { adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); vcpu->arch.tsc_offset_adjustment = 0; - set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); } if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { @@ -4064,16 +4066,16 @@ void kvm_get_segment(struct kvm_vcpu *vcpu, kvm_x86_ops->get_segment(vcpu, var, seg); } -gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) +gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, + struct x86_exception *exception) { gpa_t t_gpa; - struct x86_exception exception; BUG_ON(!mmu_is_nested(vcpu)); /* NPT walks are always user-walks */ access |= PFERR_USER_MASK; - t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); + t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); return t_gpa; } @@ -4930,16 +4932,18 @@ static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) } } -static void inject_emulated_exception(struct kvm_vcpu *vcpu) +static bool inject_emulated_exception(struct kvm_vcpu *vcpu) { struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; if (ctxt->exception.vector == PF_VECTOR) - kvm_propagate_fault(vcpu, &ctxt->exception); - else if (ctxt->exception.error_code_valid) + return kvm_propagate_fault(vcpu, &ctxt->exception); + + if (ctxt->exception.error_code_valid) kvm_queue_exception_e(vcpu, ctxt->exception.vector, ctxt->exception.error_code); else kvm_queue_exception(vcpu, ctxt->exception.vector); + return false; } static void init_emulate_ctxt(struct kvm_vcpu *vcpu) @@ -5301,8 +5305,9 @@ restart: } if (ctxt->have_exception) { - inject_emulated_exception(vcpu); r = EMULATE_DONE; + if (inject_emulated_exception(vcpu)) + return r; } else if (vcpu->arch.pio.count) { if (!vcpu->arch.pio.in) { /* FIXME: return into emulator if single-stepping. */ @@ -5570,7 +5575,7 @@ static void kvm_set_mmio_spte_mask(void) * entry to generate page fault with PFER.RSV = 1. */ /* Mask the reserved physical address bits. */ - mask = ((1ull << (51 - maxphyaddr + 1)) - 1) << maxphyaddr; + mask = rsvd_bits(maxphyaddr, 51); /* Bit 62 is always reserved for 32bit host. */ mask |= 0x3ull << 62; @@ -5601,7 +5606,7 @@ static void pvclock_gtod_update_fn(struct work_struct *work) spin_lock(&kvm_lock); list_for_each_entry(kvm, &vm_list, vm_list) kvm_for_each_vcpu(i, vcpu, kvm) - set_bit(KVM_REQ_MASTERCLOCK_UPDATE, &vcpu->requests); + kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); atomic_set(&kvm_guest_has_master_clock, 0); spin_unlock(&kvm_lock); } @@ -6959,7 +6964,7 @@ void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, unsigned int vector) kvm_rip_write(vcpu, 0); } -int kvm_arch_hardware_enable(void *garbage) +int kvm_arch_hardware_enable(void) { struct kvm *kvm; struct kvm_vcpu *vcpu; @@ -6970,7 +6975,7 @@ int kvm_arch_hardware_enable(void *garbage) bool stable, backwards_tsc = false; kvm_shared_msr_cpu_online(); - ret = kvm_x86_ops->hardware_enable(garbage); + ret = kvm_x86_ops->hardware_enable(); if (ret != 0) return ret; @@ -6979,7 +6984,7 @@ int kvm_arch_hardware_enable(void *garbage) list_for_each_entry(kvm, &vm_list, vm_list) { kvm_for_each_vcpu(i, vcpu, kvm) { if (!stable && vcpu->cpu == smp_processor_id()) - set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); if (stable && vcpu->arch.last_host_tsc > local_tsc) { backwards_tsc = true; if (vcpu->arch.last_host_tsc > max_tsc) @@ -7033,8 +7038,7 @@ int kvm_arch_hardware_enable(void *garbage) kvm_for_each_vcpu(i, vcpu, kvm) { vcpu->arch.tsc_offset_adjustment += delta_cyc; vcpu->arch.last_host_tsc = local_tsc; - set_bit(KVM_REQ_MASTERCLOCK_UPDATE, - &vcpu->requests); + kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); } /* @@ -7051,10 +7055,10 @@ int kvm_arch_hardware_enable(void *garbage) return 0; } -void kvm_arch_hardware_disable(void *garbage) +void kvm_arch_hardware_disable(void) { - kvm_x86_ops->hardware_disable(garbage); - drop_user_return_notifiers(garbage); + kvm_x86_ops->hardware_disable(); + drop_user_return_notifiers(); } int kvm_arch_hardware_setup(void) @@ -7269,8 +7273,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm) kvm_free_vcpus(kvm); if (kvm->arch.apic_access_page) put_page(kvm->arch.apic_access_page); - if (kvm->arch.ept_identity_pagetable) - put_page(kvm->arch.ept_identity_pagetable); kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); } diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 306a1b77581..985fb2c006f 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -88,15 +88,23 @@ static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu, vcpu->arch.mmio_gva = gva & PAGE_MASK; vcpu->arch.access = access; vcpu->arch.mmio_gfn = gfn; + vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation; +} + +static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation; } /* - * Clear the mmio cache info for the given gva, - * specially, if gva is ~0ul, we clear all mmio cache info. + * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we + * clear all mmio cache info. */ +#define MMIO_GVA_ANY (~(gva_t)0) + static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva) { - if (gva != (~0ul) && vcpu->arch.mmio_gva != (gva & PAGE_MASK)) + if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK)) return; vcpu->arch.mmio_gva = 0; @@ -104,7 +112,8 @@ static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva) static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva) { - if (vcpu->arch.mmio_gva && vcpu->arch.mmio_gva == (gva & PAGE_MASK)) + if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva && + vcpu->arch.mmio_gva == (gva & PAGE_MASK)) return true; return false; @@ -112,7 +121,8 @@ static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva) static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa) { - if (vcpu->arch.mmio_gfn && vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT) + if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn && + vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT) return true; return false; diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6d8a658ec17..bbd8d57b04e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -140,8 +140,6 @@ static inline bool is_error_page(struct page *page) #define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 -struct kvm; -struct kvm_vcpu; extern struct kmem_cache *kvm_vcpu_cache; extern spinlock_t kvm_lock; @@ -325,8 +323,6 @@ struct kvm_kernel_irq_routing_entry { struct hlist_node link; }; -struct kvm_irq_routing_table; - #ifndef KVM_PRIVATE_MEM_SLOTS #define KVM_PRIVATE_MEM_SLOTS 0 #endif @@ -636,8 +632,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); -int kvm_arch_hardware_enable(void *garbage); -void kvm_arch_hardware_disable(void *garbage); +int kvm_arch_hardware_enable(void); +void kvm_arch_hardware_disable(void); int kvm_arch_hardware_setup(void); void kvm_arch_hardware_unsetup(void); void kvm_arch_check_processor_compat(void *rtn); @@ -1038,8 +1034,6 @@ static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) extern bool kvm_rebooting; -struct kvm_device_ops; - struct kvm_device { struct kvm_device_ops *ops; struct kvm *kvm; @@ -1072,12 +1066,10 @@ struct kvm_device_ops { void kvm_device_get(struct kvm_device *dev); void kvm_device_put(struct kvm_device *dev); struct kvm_device *kvm_device_from_filp(struct file *filp); +int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type); extern struct kvm_device_ops kvm_mpic_ops; extern struct kvm_device_ops kvm_xics_ops; -extern struct kvm_device_ops kvm_vfio_ops; -extern struct kvm_device_ops kvm_arm_vgic_v2_ops; -extern struct kvm_device_ops kvm_flic_ops; #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index b0bcce0ddc9..b606bb689a3 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -17,6 +17,20 @@ #ifndef __KVM_TYPES_H__ #define __KVM_TYPES_H__ +struct kvm; +struct kvm_async_pf; +struct kvm_device_ops; +struct kvm_interrupt; +struct kvm_irq_routing_table; +struct kvm_memory_slot; +struct kvm_one_reg; +struct kvm_run; +struct kvm_userspace_memory_region; +struct kvm_vcpu; +struct kvm_vcpu_init; + +enum kvm_mr_change; + #include <asm/types.h> /* diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h index 908925ace77..ab679c39504 100644 --- a/include/trace/events/kvm.h +++ b/include/trace/events/kvm.h @@ -95,6 +95,26 @@ TRACE_EVENT(kvm_ioapic_set_irq, __entry->coalesced ? " (coalesced)" : "") ); +TRACE_EVENT(kvm_ioapic_delayed_eoi_inj, + TP_PROTO(__u64 e), + TP_ARGS(e), + + TP_STRUCT__entry( + __field( __u64, e ) + ), + + TP_fast_assign( + __entry->e = e; + ), + + TP_printk("dst %x vec=%u (%s|%s|%s%s)", + (u8)(__entry->e >> 56), (u8)__entry->e, + __print_symbolic((__entry->e >> 8 & 0x7), kvm_deliver_mode), + (__entry->e & (1<<11)) ? "logical" : "physical", + (__entry->e & (1<<15)) ? "level" : "edge", + (__entry->e & (1<<16)) ? "|masked" : "") +); + TRACE_EVENT(kvm_msi_set_irq, TP_PROTO(__u64 address, __u64 data), TP_ARGS(address, data), diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index cf3a2ff440e..60768822b14 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -654,9 +654,7 @@ struct kvm_ppc_smmu_info { #endif /* Bug in KVM_SET_USER_MEMORY_REGION fixed: */ #define KVM_CAP_DESTROY_MEMORY_REGION_WORKS 21 -#ifdef __KVM_HAVE_USER_NMI #define KVM_CAP_USER_NMI 22 -#endif #ifdef __KVM_HAVE_GUEST_DEBUG #define KVM_CAP_SET_GUEST_DEBUG 23 #endif @@ -738,9 +736,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_PPC_GET_SMMU_INFO 78 #define KVM_CAP_S390_COW 79 #define KVM_CAP_PPC_ALLOC_HTAB 80 -#ifdef __KVM_HAVE_READONLY_MEM #define KVM_CAP_READONLY_MEM 81 -#endif #define KVM_CAP_IRQFD_RESAMPLE 82 #define KVM_CAP_PPC_BOOKE_WATCHDOG 83 #define KVM_CAP_PPC_HTAB_FD 84 @@ -947,15 +943,25 @@ struct kvm_device_attr { __u64 addr; /* userspace address of attr data */ }; -#define KVM_DEV_TYPE_FSL_MPIC_20 1 -#define KVM_DEV_TYPE_FSL_MPIC_42 2 -#define KVM_DEV_TYPE_XICS 3 -#define KVM_DEV_TYPE_VFIO 4 #define KVM_DEV_VFIO_GROUP 1 #define KVM_DEV_VFIO_GROUP_ADD 1 #define KVM_DEV_VFIO_GROUP_DEL 2 -#define KVM_DEV_TYPE_ARM_VGIC_V2 5 -#define KVM_DEV_TYPE_FLIC 6 + +enum kvm_device_type { + KVM_DEV_TYPE_FSL_MPIC_20 = 1, +#define KVM_DEV_TYPE_FSL_MPIC_20 KVM_DEV_TYPE_FSL_MPIC_20 + KVM_DEV_TYPE_FSL_MPIC_42, +#define KVM_DEV_TYPE_FSL_MPIC_42 KVM_DEV_TYPE_FSL_MPIC_42 + KVM_DEV_TYPE_XICS, +#define KVM_DEV_TYPE_XICS KVM_DEV_TYPE_XICS + KVM_DEV_TYPE_VFIO, +#define KVM_DEV_TYPE_VFIO KVM_DEV_TYPE_VFIO + KVM_DEV_TYPE_ARM_VGIC_V2, +#define KVM_DEV_TYPE_ARM_VGIC_V2 KVM_DEV_TYPE_ARM_VGIC_V2 + KVM_DEV_TYPE_FLIC, +#define KVM_DEV_TYPE_FLIC KVM_DEV_TYPE_FLIC + KVM_DEV_TYPE_MAX, +}; /* * ioctls for VM fds @@ -1093,7 +1099,7 @@ struct kvm_s390_ucas_mapping { #define KVM_S390_INITIAL_RESET _IO(KVMIO, 0x97) #define KVM_GET_MP_STATE _IOR(KVMIO, 0x98, struct kvm_mp_state) #define KVM_SET_MP_STATE _IOW(KVMIO, 0x99, struct kvm_mp_state) -/* Available with KVM_CAP_NMI */ +/* Available with KVM_CAP_USER_NMI */ #define KVM_NMI _IO(KVMIO, 0x9a) /* Available with KVM_CAP_SET_GUEST_DEBUG */ #define KVM_SET_GUEST_DEBUG _IOW(KVMIO, 0x9b, struct kvm_guest_debug) diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index efe6eee2e7e..eeb23b37f87 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1522,83 +1522,6 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu) return 0; } -static void vgic_init_maintenance_interrupt(void *info) -{ - enable_percpu_irq(vgic->maint_irq, 0); -} - -static int vgic_cpu_notify(struct notifier_block *self, - unsigned long action, void *cpu) -{ - switch (action) { - case CPU_STARTING: - case CPU_STARTING_FROZEN: - vgic_init_maintenance_interrupt(NULL); - break; - case CPU_DYING: - case CPU_DYING_FROZEN: - disable_percpu_irq(vgic->maint_irq); - break; - } - - return NOTIFY_OK; -} - -static struct notifier_block vgic_cpu_nb = { - .notifier_call = vgic_cpu_notify, -}; - -static const struct of_device_id vgic_ids[] = { - { .compatible = "arm,cortex-a15-gic", .data = vgic_v2_probe, }, - { .compatible = "arm,gic-v3", .data = vgic_v3_probe, }, - {}, -}; - -int kvm_vgic_hyp_init(void) -{ - const struct of_device_id *matched_id; - const int (*vgic_probe)(struct device_node *,const struct vgic_ops **, - const struct vgic_params **); - struct device_node *vgic_node; - int ret; - - vgic_node = of_find_matching_node_and_match(NULL, - vgic_ids, &matched_id); - if (!vgic_node) { - kvm_err("error: no compatible GIC node found\n"); - return -ENODEV; - } - - vgic_probe = matched_id->data; - ret = vgic_probe(vgic_node, &vgic_ops, &vgic); - if (ret) - return ret; - - ret = request_percpu_irq(vgic->maint_irq, vgic_maintenance_handler, - "vgic", kvm_get_running_vcpus()); - if (ret) { - kvm_err("Cannot register interrupt %d\n", vgic->maint_irq); - return ret; - } - - ret = __register_cpu_notifier(&vgic_cpu_nb); - if (ret) { - kvm_err("Cannot register vgic CPU notifier\n"); - goto out_free_irq; - } - - /* Callback into for arch code for setup */ - vgic_arch_setup(vgic); - - on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1); - - return 0; - -out_free_irq: - free_percpu_irq(vgic->maint_irq, kvm_get_running_vcpus()); - return ret; -} - /** * kvm_vgic_init - Initialize global VGIC state before running any VCPUs * @kvm: pointer to the kvm struct @@ -2062,7 +1985,7 @@ static int vgic_create(struct kvm_device *dev, u32 type) return kvm_vgic_create(dev->kvm); } -struct kvm_device_ops kvm_arm_vgic_v2_ops = { +static struct kvm_device_ops kvm_arm_vgic_v2_ops = { .name = "kvm-arm-vgic", .create = vgic_create, .destroy = vgic_destroy, @@ -2070,3 +1993,81 @@ struct kvm_device_ops kvm_arm_vgic_v2_ops = { .get_attr = vgic_get_attr, .has_attr = vgic_has_attr, }; + +static void vgic_init_maintenance_interrupt(void *info) +{ + enable_percpu_irq(vgic->maint_irq, 0); +} + +static int vgic_cpu_notify(struct notifier_block *self, + unsigned long action, void *cpu) +{ + switch (action) { + case CPU_STARTING: + case CPU_STARTING_FROZEN: + vgic_init_maintenance_interrupt(NULL); + break; + case CPU_DYING: + case CPU_DYING_FROZEN: + disable_percpu_irq(vgic->maint_irq); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block vgic_cpu_nb = { + .notifier_call = vgic_cpu_notify, +}; + +static const struct of_device_id vgic_ids[] = { + { .compatible = "arm,cortex-a15-gic", .data = vgic_v2_probe, }, + { .compatible = "arm,gic-v3", .data = vgic_v3_probe, }, + {}, +}; + +int kvm_vgic_hyp_init(void) +{ + const struct of_device_id *matched_id; + const int (*vgic_probe)(struct device_node *,const struct vgic_ops **, + const struct vgic_params **); + struct device_node *vgic_node; + int ret; + + vgic_node = of_find_matching_node_and_match(NULL, + vgic_ids, &matched_id); + if (!vgic_node) { + kvm_err("error: no compatible GIC node found\n"); + return -ENODEV; + } + + vgic_probe = matched_id->data; + ret = vgic_probe(vgic_node, &vgic_ops, &vgic); + if (ret) + return ret; + + ret = request_percpu_irq(vgic->maint_irq, vgic_maintenance_handler, + "vgic", kvm_get_running_vcpus()); + if (ret) { + kvm_err("Cannot register interrupt %d\n", vgic->maint_irq); + return ret; + } + + ret = __register_cpu_notifier(&vgic_cpu_nb); + if (ret) { + kvm_err("Cannot register vgic CPU notifier\n"); + goto out_free_irq; + } + + /* Callback into for arch code for setup */ + vgic_arch_setup(vgic); + + on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1); + + return kvm_register_device_ops(&kvm_arm_vgic_v2_ops, + KVM_DEV_TYPE_ARM_VGIC_V2); + +out_free_irq: + free_percpu_irq(vgic->maint_irq, kvm_get_running_vcpus()); + return ret; +} diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index e8ce34c9db3..0ba4057d271 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -405,6 +405,26 @@ void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id) spin_unlock(&ioapic->lock); } +static void kvm_ioapic_eoi_inject_work(struct work_struct *work) +{ + int i; + struct kvm_ioapic *ioapic = container_of(work, struct kvm_ioapic, + eoi_inject.work); + spin_lock(&ioapic->lock); + for (i = 0; i < IOAPIC_NUM_PINS; i++) { + union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i]; + + if (ent->fields.trig_mode != IOAPIC_LEVEL_TRIG) + continue; + + if (ioapic->irr & (1 << i) && !ent->fields.remote_irr) + ioapic_service(ioapic, i, false); + } + spin_unlock(&ioapic->lock); +} + +#define IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT 10000 + static void __kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, struct kvm_ioapic *ioapic, int vector, int trigger_mode) { @@ -435,8 +455,26 @@ static void __kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); ent->fields.remote_irr = 0; - if (ioapic->irr & (1 << i)) - ioapic_service(ioapic, i, false); + if (!ent->fields.mask && (ioapic->irr & (1 << i))) { + ++ioapic->irq_eoi[i]; + if (ioapic->irq_eoi[i] == IOAPIC_SUCCESSIVE_IRQ_MAX_COUNT) { + /* + * Real hardware does not deliver the interrupt + * immediately during eoi broadcast, and this + * lets a buggy guest make slow progress + * even if it does not correctly handle a + * level-triggered interrupt. Emulate this + * behavior if we detect an interrupt storm. + */ + schedule_delayed_work(&ioapic->eoi_inject, HZ / 100); + ioapic->irq_eoi[i] = 0; + trace_kvm_ioapic_delayed_eoi_inj(ent->bits); + } else { + ioapic_service(ioapic, i, false); + } + } else { + ioapic->irq_eoi[i] = 0; + } } } @@ -565,12 +603,14 @@ static void kvm_ioapic_reset(struct kvm_ioapic *ioapic) { int i; + cancel_delayed_work_sync(&ioapic->eoi_inject); for (i = 0; i < IOAPIC_NUM_PINS; i++) ioapic->redirtbl[i].fields.mask = 1; ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS; ioapic->ioregsel = 0; ioapic->irr = 0; ioapic->id = 0; + memset(ioapic->irq_eoi, 0x00, IOAPIC_NUM_PINS); rtc_irq_eoi_tracking_reset(ioapic); update_handled_vectors(ioapic); } @@ -589,6 +629,7 @@ int kvm_ioapic_init(struct kvm *kvm) if (!ioapic) return -ENOMEM; spin_lock_init(&ioapic->lock); + INIT_DELAYED_WORK(&ioapic->eoi_inject, kvm_ioapic_eoi_inject_work); kvm->arch.vioapic = ioapic; kvm_ioapic_reset(ioapic); kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops); @@ -609,6 +650,7 @@ void kvm_ioapic_destroy(struct kvm *kvm) { struct kvm_ioapic *ioapic = kvm->arch.vioapic; + cancel_delayed_work_sync(&ioapic->eoi_inject); if (ioapic) { kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev); kvm->arch.vioapic = NULL; diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h index 90d43e95dcf..e23b70634f1 100644 --- a/virt/kvm/ioapic.h +++ b/virt/kvm/ioapic.h @@ -59,6 +59,8 @@ struct kvm_ioapic { spinlock_t lock; DECLARE_BITMAP(handled_vectors, 256); struct rtc_status rtc_status; + struct delayed_work eoi_inject; + u32 irq_eoi[IOAPIC_NUM_PINS]; }; #ifdef DEBUG diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 76c92a7249c..27823202512 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -95,8 +95,6 @@ static int hardware_enable_all(void); static void hardware_disable_all(void); static void kvm_io_bus_destroy(struct kvm_io_bus *bus); -static void update_memslots(struct kvm_memslots *slots, - struct kvm_memory_slot *new, u64 last_generation); static void kvm_release_pfn_dirty(pfn_t pfn); static void mark_page_dirty_in_slot(struct kvm *kvm, @@ -477,6 +475,13 @@ static struct kvm *kvm_create_vm(unsigned long type) kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); if (!kvm->memslots) goto out_err_no_srcu; + + /* + * Init kvm generation close to the maximum to easily test the + * code of handling generation number wrap-around. + */ + kvm->memslots->generation = -150; + kvm_init_memslots_id(kvm); if (init_srcu_struct(&kvm->srcu)) goto out_err_no_srcu; @@ -688,8 +693,7 @@ static void sort_memslots(struct kvm_memslots *slots) } static void update_memslots(struct kvm_memslots *slots, - struct kvm_memory_slot *new, - u64 last_generation) + struct kvm_memory_slot *new) { if (new) { int id = new->id; @@ -700,15 +704,13 @@ static void update_memslots(struct kvm_memslots *slots, if (new->npages != npages) sort_memslots(slots); } - - slots->generation = last_generation + 1; } static int check_memory_region_flags(struct kvm_userspace_memory_region *mem) { u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; -#ifdef KVM_CAP_READONLY_MEM +#ifdef __KVM_HAVE_READONLY_MEM valid_flags |= KVM_MEM_READONLY; #endif @@ -723,10 +725,24 @@ static struct kvm_memslots *install_new_memslots(struct kvm *kvm, { struct kvm_memslots *old_memslots = kvm->memslots; - update_memslots(slots, new, kvm->memslots->generation); + /* + * Set the low bit in the generation, which disables SPTE caching + * until the end of synchronize_srcu_expedited. + */ + WARN_ON(old_memslots->generation & 1); + slots->generation = old_memslots->generation + 1; + + update_memslots(slots, new); rcu_assign_pointer(kvm->memslots, slots); synchronize_srcu_expedited(&kvm->srcu); + /* + * Increment the new memslot generation a second time. This prevents + * vm exits that race with memslot updates from caching a memslot + * generation that will (potentially) be valid forever. + */ + slots->generation++; + kvm_arch_memslots_updated(kvm); return old_memslots; @@ -777,7 +793,6 @@ int __kvm_set_memory_region(struct kvm *kvm, base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; npages = mem->memory_size >> PAGE_SHIFT; - r = -EINVAL; if (npages > KVM_MEM_MAX_NR_PAGES) goto out; @@ -791,7 +806,6 @@ int __kvm_set_memory_region(struct kvm *kvm, new.npages = npages; new.flags = mem->flags; - r = -EINVAL; if (npages) { if (!old.npages) change = KVM_MR_CREATE; @@ -847,7 +861,6 @@ int __kvm_set_memory_region(struct kvm *kvm, } if ((change == KVM_MR_DELETE) || (change == KVM_MR_MOVE)) { - r = -ENOMEM; slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), GFP_KERNEL); if (!slots) @@ -1776,8 +1789,7 @@ static bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) bool eligible; eligible = !vcpu->spin_loop.in_spin_loop || - (vcpu->spin_loop.in_spin_loop && - vcpu->spin_loop.dy_eligible); + vcpu->spin_loop.dy_eligible; if (vcpu->spin_loop.in_spin_loop) kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); @@ -2267,6 +2279,29 @@ struct kvm_device *kvm_device_from_filp(struct file *filp) return filp->private_data; } +static struct kvm_device_ops *kvm_device_ops_table[KVM_DEV_TYPE_MAX] = { +#ifdef CONFIG_KVM_MPIC + [KVM_DEV_TYPE_FSL_MPIC_20] = &kvm_mpic_ops, + [KVM_DEV_TYPE_FSL_MPIC_42] = &kvm_mpic_ops, +#endif + +#ifdef CONFIG_KVM_XICS + [KVM_DEV_TYPE_XICS] = &kvm_xics_ops, +#endif +}; + +int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type) +{ + if (type >= ARRAY_SIZE(kvm_device_ops_table)) + return -ENOSPC; + + if (kvm_device_ops_table[type] != NULL) + return -EEXIST; + + kvm_device_ops_table[type] = ops; + return 0; +} + static int kvm_ioctl_create_device(struct kvm *kvm, struct kvm_create_device *cd) { @@ -2275,36 +2310,12 @@ static int kvm_ioctl_create_device(struct kvm *kvm, bool test = cd->flags & KVM_CREATE_DEVICE_TEST; int ret; - switch (cd->type) { -#ifdef CONFIG_KVM_MPIC - case KVM_DEV_TYPE_FSL_MPIC_20: - case KVM_DEV_TYPE_FSL_MPIC_42: - ops = &kvm_mpic_ops; - break; -#endif -#ifdef CONFIG_KVM_XICS - case KVM_DEV_TYPE_XICS: - ops = &kvm_xics_ops; - break; -#endif -#ifdef CONFIG_KVM_VFIO - case KVM_DEV_TYPE_VFIO: - ops = &kvm_vfio_ops; - break; -#endif -#ifdef CONFIG_KVM_ARM_VGIC - case KVM_DEV_TYPE_ARM_VGIC_V2: - ops = &kvm_arm_vgic_v2_ops; - break; -#endif -#ifdef CONFIG_S390 - case KVM_DEV_TYPE_FLIC: - ops = &kvm_flic_ops; - break; -#endif - default: + if (cd->type >= ARRAY_SIZE(kvm_device_ops_table)) + return -ENODEV; + + ops = kvm_device_ops_table[cd->type]; + if (ops == NULL) return -ENODEV; - } if (test) return 0; @@ -2619,7 +2630,6 @@ static long kvm_dev_ioctl(struct file *filp, switch (ioctl) { case KVM_GET_API_VERSION: - r = -EINVAL; if (arg) goto out; r = KVM_API_VERSION; @@ -2631,7 +2641,6 @@ static long kvm_dev_ioctl(struct file *filp, r = kvm_vm_ioctl_check_extension_generic(NULL, arg); break; case KVM_GET_VCPU_MMAP_SIZE: - r = -EINVAL; if (arg) goto out; r = PAGE_SIZE; /* struct kvm_run */ @@ -2676,7 +2685,7 @@ static void hardware_enable_nolock(void *junk) cpumask_set_cpu(cpu, cpus_hardware_enabled); - r = kvm_arch_hardware_enable(NULL); + r = kvm_arch_hardware_enable(); if (r) { cpumask_clear_cpu(cpu, cpus_hardware_enabled); @@ -2701,7 +2710,7 @@ static void hardware_disable_nolock(void *junk) if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) return; cpumask_clear_cpu(cpu, cpus_hardware_enabled); - kvm_arch_hardware_disable(NULL); + kvm_arch_hardware_disable(); } static void hardware_disable(void) diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c index ba1a93f935c..bb11b36ee8a 100644 --- a/virt/kvm/vfio.c +++ b/virt/kvm/vfio.c @@ -246,6 +246,16 @@ static void kvm_vfio_destroy(struct kvm_device *dev) kfree(dev); /* alloc by kvm_ioctl_create_device, free by .destroy */ } +static int kvm_vfio_create(struct kvm_device *dev, u32 type); + +static struct kvm_device_ops kvm_vfio_ops = { + .name = "kvm-vfio", + .create = kvm_vfio_create, + .destroy = kvm_vfio_destroy, + .set_attr = kvm_vfio_set_attr, + .has_attr = kvm_vfio_has_attr, +}; + static int kvm_vfio_create(struct kvm_device *dev, u32 type) { struct kvm_device *tmp; @@ -268,10 +278,8 @@ static int kvm_vfio_create(struct kvm_device *dev, u32 type) return 0; } -struct kvm_device_ops kvm_vfio_ops = { - .name = "kvm-vfio", - .create = kvm_vfio_create, - .destroy = kvm_vfio_destroy, - .set_attr = kvm_vfio_set_attr, - .has_attr = kvm_vfio_has_attr, -}; +static int __init kvm_vfio_ops_init(void) +{ + return kvm_register_device_ops(&kvm_vfio_ops, KVM_DEV_TYPE_VFIO); +} +module_init(kvm_vfio_ops_init); |