From: Andre Przywara Date: Thu, 28 May 2009 09:56:31 +0000 (+0200) Subject: KVM: SVM: use explicit 64bit storage for sysenter values X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=017cb99e875f2d8ff375cbb576c794b081cd0bd5;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Andre Przywara Signed-off-by: Avi Kivity --- diff --git a/arch/x86/kvm/kvm_svm.h b/arch/x86/kvm/kvm_svm.h index ed66e4c078dc..6f275b4cf628 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 48b22c9892d8..e3e7edca35d1 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: