Re: [PATCH 0/7] KVM: VMX: Handle NMI VM-Exits in noinstr section

Sean Christopherson
2023-01-28T00:08:30Z

On Tue, 13 Dec 2022 06:09:05 +0000, Sean Christopherson wrote:
> Move NMI VM-Exit handling into vmx_vcpu_enter_exit() to fix a (mostly
> benign?) bug where NMIs can be unblocked prior to servicing the NMI that
> triggered the VM-Exit, e.g. if instrumentation triggers a fault and thus
> an IRET. I deliberately didn't tag any of these for stable@ as the odds
> of me screwing something up or of a backport going sideways seems higher
> than out-of-order NMIs causing major problems.
>
> [...]

Applied to kvm-x86 vmx, thanks!

[1/7] KVM: x86: Make vmx_get_exit_qual() and vmx_get_intr_info() noinstr-friendly
https://github.com/kvm-x86/linux/commit/fc9465be8aad
[2/7] KVM: VMX: Allow VM-Fail path of VMREAD helper to be instrumented
https://github.com/kvm-x86/linux/commit/8578f59657c5
[3/7] KVM: VMX: Always inline eVMCS read/write helpers
https://github.com/kvm-x86/linux/commit/11633f69506d
[4/7] KVM: VMX: Always inline to_vmx() and to_kvm_vmx()
https://github.com/kvm-x86/linux/commit/432727f1cb6e
[5/7] x86/entry: KVM: Use dedicated VMX NMI entry for 32-bit kernels too
https://github.com/kvm-x86/linux/commit/54a3b70a75dc
[6/7] KVM: VMX: Provide separate subroutines for invoking NMI vs. IRQ handlers
https://github.com/kvm-x86/linux/commit/4f76e86f7e0d
[7/7] KVM: VMX: Handle NMI VM-Exits in noinstr region
https://github.com/kvm-x86/linux/commit/11df586d774f

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