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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/vmx.c | |
| parent | 9926c9fdbdd54bb229fe6fdbd15ca3af2b8425ae (diff) | |
| download | lwn-73aaf249ee2287b4686ff079dcbdbbb658156e64.tar.gz lwn-73aaf249ee2287b4686ff079dcbdbbb658156e64.zip | |
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/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 7661eb171936..79b360e4fed1 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5149,6 +5149,15 @@ static int handle_dr(struct kvm_vcpu *vcpu) return 1; } +static u64 vmx_get_dr6(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.dr6; +} + +static void vmx_set_dr6(struct kvm_vcpu *vcpu, unsigned long val) +{ +} + static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) { vmcs_writel(GUEST_DR7, val); @@ -8556,6 +8565,8 @@ static struct kvm_x86_ops vmx_x86_ops = { .set_idt = vmx_set_idt, .get_gdt = vmx_get_gdt, .set_gdt = vmx_set_gdt, + .get_dr6 = vmx_get_dr6, + .set_dr6 = vmx_set_dr6, .set_dr7 = vmx_set_dr7, .cache_reg = vmx_cache_reg, .get_rflags = vmx_get_rflags, |