Re: [GIT PULL] KVM: x86: SVM changes for 6.8
From: Paolo Bonzini
Date: Mon Jan 08 2024 - 08:06:10 EST
On Thu, Jan 4, 2024 at 8:33 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
>
> A few minor fixes and cleanups, along with feature "enabling" for flush-by-ASID
> to play nice with newer versions of VMware Workstation that require it.
>
> The following changes since commit e9e60c82fe391d04db55a91c733df4a017c28b2f:
>
> selftests/kvm: fix compilation on non-x86_64 platforms (2023-11-21 11:58:25 -0500)
>
> are available in the Git repository at:
>
> https://github.com/kvm-x86/linux.git tags/kvm-x86-svm-6.8
>
> for you to fetch changes up to 72046d0a077a8f70d4d1e5bdeed324c1a310da8c:
>
> KVM: SVM: Don't intercept IRET when injecting NMI and vNMI is enabled (2023-11-30 12:51:22 -0800)
Pulled, thanks.
Paolo
> ----------------------------------------------------------------
> KVM SVM changes for 6.8:
>
> - Revert a bogus, made-up nested SVM consistency check for TLB_CONTROL.
>
> - Advertise flush-by-ASID support for nSVM unconditionally, as KVM always
> flushes on nested transitions, i.e. always satisfies flush requests. This
> allows running bleeding edge versions of VMware Workstation on top of KVM.
>
> - Sanity check that the CPU supports flush-by-ASID when enabling SEV support.
>
> - Fix a benign NMI virtualization bug where KVM would unnecessarily intercept
> IRET when manually injecting an NMI, e.g. when KVM pends an NMI and injects
> a second, "simultaneous" NMI.
>
> ----------------------------------------------------------------
> Sean Christopherson (4):
> Revert "nSVM: Check for reserved encodings of TLB_CONTROL in nested VMCB"
> KVM: nSVM: Advertise support for flush-by-ASID
> KVM: SVM: Explicitly require FLUSHBYASID to enable SEV support
> KVM: SVM: Don't intercept IRET when injecting NMI and vNMI is enabled
>
> arch/x86/kvm/svm/nested.c | 15 ---------------
> arch/x86/kvm/svm/sev.c | 7 +++++--
> arch/x86/kvm/svm/svm.c | 18 ++++++++++++++++--
> 3 files changed, 21 insertions(+), 19 deletions(-)
>