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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2014-01-04 18:47:16 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-01-17 10:22:10 +0100 |
| commit | 73aaf249ee2287b4686ff079dcbdbbb658156e64 (patch) | |
| tree | 6b32cc40f12e7a91827b77e5648e7bcff1e4efd6 /arch/x86/kvm/svm.c | |
| parent | 9926c9fdbdd54bb229fe6fdbd15ca3af2b8425ae (diff) | |
| download | linux-73aaf249ee2287b4686ff079dcbdbbb658156e64.tar.bz2 | |
KVM: SVM: Fix reading of DR6
In contrast to VMX, SVM dose not automatically transfer DR6 into the
VCPU's arch.dr6. So if we face a DR6 read, we must consult a new vendor
hook to obtain the current value. And as SVM now picks the DR6 state
from its VMCB, we also need a set callback in order to write updates of
DR6 back.
Fixes a regression of 020df0794f.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index c7168a5cff1b..e81df8fce027 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1671,6 +1671,19 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) mark_dirty(svm->vmcb, VMCB_ASID); } +static u64 svm_get_dr6(struct kvm_vcpu *vcpu) +{ + return to_svm(vcpu)->vmcb->save.dr6; +} + +static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value) +{ + struct vcpu_svm *svm = to_svm(vcpu); + + svm->vmcb->save.dr6 = value; + mark_dirty(svm->vmcb, VMCB_DR); +} + static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value) { struct vcpu_svm *svm = to_svm(vcpu); @@ -4286,6 +4299,8 @@ static struct kvm_x86_ops svm_x86_ops = { .set_idt = svm_set_idt, .get_gdt = svm_get_gdt, .set_gdt = svm_set_gdt, + .get_dr6 = svm_get_dr6, + .set_dr6 = svm_set_dr6, .set_dr7 = svm_set_dr7, .cache_reg = svm_cache_reg, .get_rflags = svm_get_rflags, |