diff options
| author | Andre Przywara <andre.przywara@amd.com> | 2009-05-28 09:56:31 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 05:32:43 (GMT) |
| commit | 017cb99e875f2d8ff375cbb576c794b081cd0bd5 (patch) | |
| tree | 082e502aa174a68f86266e57b55cf35e7d93a13c /arch/x86/kvm | |
| parent | e7333391403b31feb27a05bc0dcd052a471f1276 (diff) | |
| download | linux-017cb99e875f2d8ff375cbb576c794b081cd0bd5.tar.xz | |
KVM: SVM: use explicit 64bit storage for sysenter values
Since AMD does not support sysenter in 64bit mode, the VMCB fields storing
the MSRs are truncated to 32bit upon VMRUN/#VMEXIT. So store the values
in a separate 64bit storage to avoid truncation.
[andre: fix amd->amd migration]
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/kvm_svm.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 8 |
2 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/kvm/kvm_svm.h b/arch/x86/kvm/kvm_svm.h index ed66e4c..6f275b4 100644 --- a/arch/x86/kvm/kvm_svm.h +++ b/arch/x86/kvm/kvm_svm.h @@ -27,6 +27,8 @@ struct vcpu_svm { unsigned long vmcb_pa; struct svm_cpu_data *svm_data; uint64_t asid_generation; + uint64_t sysenter_esp; + uint64_t sysenter_eip; u64 next_rip; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 48b22c9..e3e7edc 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -367,8 +367,6 @@ static void svm_vcpu_init_msrpm(u32 *msrpm) #endif set_msr_interception(msrpm, MSR_K6_STAR, 1, 1); set_msr_interception(msrpm, MSR_IA32_SYSENTER_CS, 1, 1); - set_msr_interception(msrpm, MSR_IA32_SYSENTER_ESP, 1, 1); - set_msr_interception(msrpm, MSR_IA32_SYSENTER_EIP, 1, 1); } static void svm_enable_lbrv(struct vcpu_svm *svm) @@ -1981,10 +1979,10 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) *data = svm->vmcb->save.sysenter_cs; break; case MSR_IA32_SYSENTER_EIP: - *data = svm->vmcb->save.sysenter_eip; + *data = svm->sysenter_eip; break; case MSR_IA32_SYSENTER_ESP: - *data = svm->vmcb->save.sysenter_esp; + *data = svm->sysenter_esp; break; /* Nobody will change the following 5 values in the VMCB so we can safely return them on rdmsr. They will always be 0 @@ -2071,9 +2069,11 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) svm->vmcb->save.sysenter_cs = data; break; case MSR_IA32_SYSENTER_EIP: + svm->sysenter_eip = data; svm->vmcb->save.sysenter_eip = data; break; case MSR_IA32_SYSENTER_ESP: + svm->sysenter_esp = data; svm->vmcb->save.sysenter_esp = data; break; case MSR_IA32_DEBUGCTLMSR: |