KVM: mark segments accessed on HW task switch

[safe/jmp/linux-2.6] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a4a7d18..d47ceda 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -456,7 +456,7 @@ void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 
        if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
 #ifdef CONFIG_X86_64
-               if ((vcpu->arch.shadow_efer & EFER_LME)) {
+               if ((vcpu->arch.efer & EFER_LME)) {
                        int cs_db, cs_l;
 
                        if (!is_pae(vcpu)) {
@@ -655,7 +655,7 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
        }
 
        if (is_paging(vcpu)
-           && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
+           && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) {
                printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
                kvm_inject_gp(vcpu, 0);
                return;
@@ -686,9 +686,9 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
        kvm_x86_ops->set_efer(vcpu, efer);
 
        efer &= ~EFER_LMA;
-       efer |= vcpu->arch.shadow_efer & EFER_LMA;
+       efer |= vcpu->arch.efer & EFER_LMA;
 
-       vcpu->arch.shadow_efer = efer;
+       vcpu->arch.efer = efer;
 
        vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
        kvm_mmu_reset_context(vcpu);
@@ -1426,7 +1426,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
                data |= (((uint64_t)4ULL) << 40);
                break;
        case MSR_EFER:
-               data = vcpu->arch.shadow_efer;
+               data = vcpu->arch.efer;
                break;
        case MSR_KVM_WALL_CLOCK:
                data = vcpu->kvm->arch.wall_clock;
@@ -4569,7 +4569,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
        sregs->cr3 = vcpu->arch.cr3;
        sregs->cr4 = kvm_read_cr4(vcpu);
        sregs->cr8 = kvm_get_cr8(vcpu);
-       sregs->efer = vcpu->arch.shadow_efer;
+       sregs->efer = vcpu->arch.efer;
        sregs->apic_base = kvm_get_apic_base(vcpu);
 
        memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
@@ -4697,18 +4697,6 @@ static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg)
        return kvm_seg.selector;
 }
 
-static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu,
-                                               u16 selector,
-                                               struct kvm_segment *kvm_seg)
-{
-       struct desc_struct seg_desc;
-
-       if (load_guest_segment_descriptor(vcpu, selector, &seg_desc))
-               return 1;
-       seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg);
-       return 0;
-}
-
 static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg)
 {
        struct kvm_segment segvar = {
@@ -4749,11 +4737,14 @@ int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
                                int type_bits, int seg)
 {
        struct kvm_segment kvm_seg;
+       struct desc_struct seg_desc;
 
        if (is_vm86_segment(vcpu, seg) || !is_protmode(vcpu))
                return kvm_load_realmode_segment(vcpu, selector, seg);
-       if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg))
+
+       if (load_guest_segment_descriptor(vcpu, selector, &seg_desc))
                return 1;
+       seg_desct_to_kvm_desct(&seg_desc, selector, &kvm_seg);
 
        kvm_check_segment_descriptor(vcpu, seg, selector);
        kvm_seg.type |= type_bits;
@@ -4764,6 +4755,11 @@ int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
                        kvm_seg.unusable = 1;
 
        kvm_set_segment(vcpu, &kvm_seg, seg);
+       if (selector && !kvm_seg.unusable && kvm_seg.s) {
+               /* mark segment as accessed */
+               seg_desc.type |= 1;
+               save_guest_segment_descriptor(vcpu, selector, &seg_desc);
+       }
        return 0;
 }
 
@@ -5059,7 +5055,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 
        kvm_set_cr8(vcpu, sregs->cr8);
 
-       mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
+       mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
        kvm_x86_ops->set_efer(vcpu, sregs->efer);
        kvm_set_apic_base(vcpu, sregs->apic_base);
 
@@ -5292,6 +5288,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
        vcpu->guest_fpu_loaded = 1;
        kvm_fx_save(&vcpu->arch.host_fx_image);
        kvm_fx_restore(&vcpu->arch.guest_fx_image);
+       trace_kvm_fpu(1);
 }
 
 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
@@ -5304,6 +5301,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
        kvm_fx_restore(&vcpu->arch.host_fx_image);
        ++vcpu->stat.fpu_reload;
        set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
+       trace_kvm_fpu(0);
 }
 
 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)