diff options
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 9 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 37 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 30 |
3 files changed, 37 insertions, 39 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index e3167224d93..ec891a2ce86 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -644,8 +644,6 @@ int emulator_write_emulated(unsigned long addr, unsigned int bytes, struct kvm_vcpu *vcpu); -unsigned long segment_base(u16 selector); - void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, int bytes, @@ -723,13 +721,6 @@ static inline void kvm_get_idt(struct desc_ptr *table) asm("sidt %0" : "=m"(*table)); } -static inline unsigned long kvm_read_tr_base(void) -{ - u16 tr; - asm("str %0" : "=g"(tr)); - return segment_base(tr); -} - #ifdef CONFIG_X86_64 static inline unsigned long read_msr(unsigned long msr) { diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 68712bdf040..8e2a24693be 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -634,6 +634,43 @@ static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) return true; } +static unsigned long segment_base(u16 selector) +{ + struct desc_ptr gdt; + struct desc_struct *d; + unsigned long table_base; + unsigned long v; + + if (!(selector & ~3)) + return 0; + + native_store_gdt(&gdt); + table_base = gdt.address; + + if (selector & 4) { /* from ldt */ + u16 ldt_selector = kvm_read_ldt(); + + if (!(ldt_selector & ~3)) + return 0; + + table_base = segment_base(ldt_selector); + } + d = (struct desc_struct *)(table_base + (selector & ~7)); + v = get_desc_base(d); +#ifdef CONFIG_X86_64 + if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) + v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; +#endif + return v; +} + +static inline unsigned long kvm_read_tr_base(void) +{ + u16 tr; + asm("str %0" : "=g"(tr)); + return segment_base(tr); +} + static void vmx_save_host_state(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 814e72a02ef..2b34dc705cf 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -223,36 +223,6 @@ static void drop_user_return_notifiers(void *ignore) kvm_on_user_return(&smsr->urn); } -unsigned long segment_base(u16 selector) -{ - struct desc_ptr gdt; - struct desc_struct *d; - unsigned long table_base; - unsigned long v; - - if (!(selector & ~3)) - return 0; - - native_store_gdt(&gdt); - table_base = gdt.address; - - if (selector & 4) { /* from ldt */ - u16 ldt_selector = kvm_read_ldt(); - - if (!(ldt_selector & ~3)) - return 0; - table_base = segment_base(ldt_selector); - } - d = (struct desc_struct *)(table_base + (selector & ~7)); - v = get_desc_base(d); -#ifdef CONFIG_X86_64 - if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) - v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; -#endif - return v; -} -EXPORT_SYMBOL_GPL(segment_base); - u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) { if (irqchip_in_kernel(vcpu->kvm)) |