| Message ID | 20210423223404.3860547-1-seanjc@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: x86: MSR_TSC_AUX fixes and improvements | expand |
On 24/04/21 00:34, Sean Christopherson wrote: > Fix potential cross-vendor landmines due to Intel and AMD having different > behavior for MSR_TSC_AUX[63:32], unify the logic across SVM and VMX, and > switch MSR_TSC_AUX via user return MSRs on SVM (the original goal). > > v3: > - Fix a comment typo. [Reiji] > - Add patches to add missing guest_cpuid_has() check, drop bits 63:32 on > AMD, and unify VMX and SVM emulation. > - Rebase to kvm/next, commit c4f71901d53b ("Merge tag 'kvmarm-5.13' ... ) > > v2: > - Rebase to kvm/queue (ish), commit 0e91d1992235 ("KVM: SVM: Allocate SEV > command structures on local stack") > - https://lkml.kernel.org/r/20210422001736.3255735-1-seanjc@google.com > > v1: https://lkml.kernel.org/r/20210206003224.302728-1-seanjc@google.com > > > Sean Christopherson (4): > KVM: SVM: Inject #GP on guest MSR_TSC_AUX accesses if RDTSCP > unsupported > KVM: SVM: Clear MSR_TSC_AUX[63:32] on write > KVM: x86: Tie Intel and AMD behavior for MSR_TSC_AUX to guest CPU > model > KVM: SVM: Delay restoration of host MSR_TSC_AUX until return to > userspace > > arch/x86/kvm/svm/svm.c | 58 +++++++++++++++++------------------------- > arch/x86/kvm/svm/svm.h | 7 ----- > arch/x86/kvm/vmx/vmx.c | 13 ---------- > arch/x86/kvm/x86.c | 34 +++++++++++++++++++++++++ > 4 files changed, 58 insertions(+), 54 deletions(-) > Queued 1-2-4 (with fix for patch 2). Paolo
Fix potential cross-vendor landmines due to Intel and AMD having different behavior for MSR_TSC_AUX[63:32], unify the logic across SVM and VMX, and switch MSR_TSC_AUX via user return MSRs on SVM (the original goal). v3: - Fix a comment typo. [Reiji] - Add patches to add missing guest_cpuid_has() check, drop bits 63:32 on AMD, and unify VMX and SVM emulation. - Rebase to kvm/next, commit c4f71901d53b ("Merge tag 'kvmarm-5.13' ... ) v2: - Rebase to kvm/queue (ish), commit 0e91d1992235 ("KVM: SVM: Allocate SEV command structures on local stack") - https://lkml.kernel.org/r/20210422001736.3255735-1-seanjc@google.com v1: https://lkml.kernel.org/r/20210206003224.302728-1-seanjc@google.com Sean Christopherson (4): KVM: SVM: Inject #GP on guest MSR_TSC_AUX accesses if RDTSCP unsupported KVM: SVM: Clear MSR_TSC_AUX[63:32] on write KVM: x86: Tie Intel and AMD behavior for MSR_TSC_AUX to guest CPU model KVM: SVM: Delay restoration of host MSR_TSC_AUX until return to userspace arch/x86/kvm/svm/svm.c | 58 +++++++++++++++++------------------------- arch/x86/kvm/svm/svm.h | 7 ----- arch/x86/kvm/vmx/vmx.c | 13 ---------- arch/x86/kvm/x86.c | 34 +++++++++++++++++++++++++ 4 files changed, 58 insertions(+), 54 deletions(-)