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KVM: Fix mov cr3 #GP at wrong instruction

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On Intel, we call skip_emulated_instruction() even if we injected a #GP,
resulting in the #GP pointing at the wrong address.

Fix by injecting the exception and skipping the instruction at the same place,
so we can do just one or the other.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity
2010-06-10 17:02:16 +03:00
parent a83b29c6ad
commit 2390218b6a
5 changed files with 8 additions and 14 deletions
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10
arch/x86/kvm/x86.c
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@ -565,7 +565,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
}
EXPORT_SYMBOL_GPL(kvm_set_cr4);
static int __kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
kvm_mmu_sync_roots(vcpu);
@ -604,12 +604,6 @@ static int __kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
vcpu->arch.mmu.new_cr3(vcpu);
return 0;
}
void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
if (__kvm_set_cr3(vcpu, cr3))
kvm_inject_gp(vcpu, 0);
}
EXPORT_SYMBOL_GPL(kvm_set_cr3);
int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
@ -3726,7 +3720,7 @@ static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
vcpu->arch.cr2 = val;
break;
case 3:
res = __kvm_set_cr3(vcpu, val);
res = kvm_set_cr3(vcpu, val);
break;
case 4:
res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));