From 7330672befe6269e575f79b924a7068b26c144b4 Mon Sep 17 00:00:00 2001 From: Christoffer Dall Date: Fri, 25 Oct 2013 17:29:18 +0100 Subject: KVM: arm-vgic: Support KVM_CREATE_DEVICE for VGIC Support creating the ARM VGIC device through the KVM_CREATE_DEVICE ioctl, which can then later be leveraged to use the KVM_{GET/SET}_DEVICE_ATTR, which is useful both for setting addresses in a more generic API than the ARM-specific one and is useful for save/restore of VGIC state. Adds KVM_CAP_DEVICE_CTRL to ARM capabilities. Note that we change the check for creating a VGIC from bailing out if any VCPUs were created, to bailing out if any VCPUs were ever run. This is an important distinction that shouldn't break anything, but allows creating the VGIC after the VCPUs have been created. Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall --- include/uapi/linux/kvm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 902f1246187..b647c291739 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -853,6 +853,7 @@ struct kvm_device_attr { #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 /* * ioctls for VM fds -- cgit v1.2.3-70-g09d2 From e984097b553ed2d6551c805223e4057421370f00 Mon Sep 17 00:00:00 2001 From: Vadim Rozenfeld Date: Thu, 16 Jan 2014 20:18:37 +1100 Subject: add support for Hyper-V reference time counter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off: Peter Lieven Signed-off: Gleb Natapov Signed-off: Vadim Rozenfeld After some consideration I decided to submit only Hyper-V reference counters support this time. I will submit iTSC support as a separate patch as soon as it is ready. v1 -> v2 1. mark TSC page dirty as suggested by Eric Northup and Gleb 2. disable local irq when calling get_kernel_ns, as it was done by Peter Lieven 3. move check for TSC page enable from second patch to this one. v3 -> v4     Get rid of ref counter offset. v4 -> v5 replace __copy_to_user with kvm_write_guest when updateing iTSC page. Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/include/uapi/asm/hyperv.h | 13 +++++++++++++ arch/x86/kvm/x86.c | 28 +++++++++++++++++++++++++++- include/uapi/linux/kvm.h | 1 + 4 files changed, 42 insertions(+), 1 deletion(-) (limited to 'include/uapi') diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index ae5d7830855..33fef0738a2 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -605,6 +605,7 @@ struct kvm_arch { /* fields used by HYPER-V emulation */ u64 hv_guest_os_id; u64 hv_hypercall; + u64 hv_tsc_page; #ifdef CONFIG_KVM_MMU_AUDIT int audit_point; diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h index b8f1c0176cb..462efe746d7 100644 --- a/arch/x86/include/uapi/asm/hyperv.h +++ b/arch/x86/include/uapi/asm/hyperv.h @@ -28,6 +28,9 @@ /* Partition Reference Counter (HV_X64_MSR_TIME_REF_COUNT) available*/ #define HV_X64_MSR_TIME_REF_COUNT_AVAILABLE (1 << 1) +/* A partition's reference time stamp counter (TSC) page */ +#define HV_X64_MSR_REFERENCE_TSC 0x40000021 + /* * There is a single feature flag that signifies the presence of the MSR * that can be used to retrieve both the local APIC Timer frequency as @@ -198,6 +201,9 @@ #define HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_MASK \ (~((1ull << HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT) - 1)) +#define HV_X64_MSR_TSC_REFERENCE_ENABLE 0x00000001 +#define HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT 12 + #define HV_PROCESSOR_POWER_STATE_C0 0 #define HV_PROCESSOR_POWER_STATE_C1 1 #define HV_PROCESSOR_POWER_STATE_C2 2 @@ -210,4 +216,11 @@ #define HV_STATUS_INVALID_ALIGNMENT 4 #define HV_STATUS_INSUFFICIENT_BUFFERS 19 +typedef struct _HV_REFERENCE_TSC_PAGE { + __u32 tsc_sequence; + __u32 res1; + __u64 tsc_scale; + __s64 tsc_offset; +} HV_REFERENCE_TSC_PAGE, *PHV_REFERENCE_TSC_PAGE; + #endif diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0fbdced7873..0b3fd809a3c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -839,11 +839,12 @@ EXPORT_SYMBOL_GPL(kvm_rdpmc); * kvm-specific. Those are put in the beginning of the list. */ -#define KVM_SAVE_MSRS_BEGIN 10 +#define KVM_SAVE_MSRS_BEGIN 12 static u32 msrs_to_save[] = { MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, + HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, MSR_KVM_PV_EOI_EN, MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, @@ -1788,6 +1789,8 @@ static bool kvm_hv_msr_partition_wide(u32 msr) switch (msr) { case HV_X64_MSR_GUEST_OS_ID: case HV_X64_MSR_HYPERCALL: + case HV_X64_MSR_REFERENCE_TSC: + case HV_X64_MSR_TIME_REF_COUNT: r = true; break; } @@ -1829,6 +1832,20 @@ static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) kvm->arch.hv_hypercall = data; break; } + case HV_X64_MSR_REFERENCE_TSC: { + u64 gfn; + HV_REFERENCE_TSC_PAGE tsc_ref; + memset(&tsc_ref, 0, sizeof(tsc_ref)); + kvm->arch.hv_tsc_page = data; + if (!(data & HV_X64_MSR_TSC_REFERENCE_ENABLE)) + break; + gfn = data >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT; + if (kvm_write_guest(kvm, data, + &tsc_ref, sizeof(tsc_ref))) + return 1; + mark_page_dirty(kvm, gfn); + break; + } default: vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " "data 0x%llx\n", msr, data); @@ -2253,6 +2270,14 @@ static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case HV_X64_MSR_HYPERCALL: data = kvm->arch.hv_hypercall; break; + case HV_X64_MSR_TIME_REF_COUNT: { + data = + div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100); + break; + } + case HV_X64_MSR_REFERENCE_TSC: + data = kvm->arch.hv_tsc_page; + break; default: vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); return 1; @@ -2566,6 +2591,7 @@ int kvm_dev_ioctl_check_extension(long ext) #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT case KVM_CAP_ASSIGN_DEV_IRQ: case KVM_CAP_PCI_2_3: + case KVM_CAP_HYPERV_TIME: #endif r = 1; break; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index b647c291739..932d7f2637d 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -674,6 +674,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_ARM_EL1_32BIT 93 #define KVM_CAP_SPAPR_MULTITCE 94 #define KVM_CAP_EXT_EMUL_CPUID 95 +#define KVM_CAP_HYPERV_TIME 96 #ifdef KVM_CAP_IRQ_ROUTING -- cgit v1.2.3-70-g09d2