Re: [PATCH] KVM: x86: Return "unsupported" instead of "invalid" on access to unsupported PV MSR

[Sean Christopherson]

On Tue, 30 Dec 2025 12:59:48 -0800, Sean Christopherson wrote:
> Return KVM_MSR_RET_UNSUPPORTED instead of '1' (which for all intents and
> purposes means "invalid") when rejecting accesses to KVM PV MSRs to adhere
> to KVM's ABI of allowing host reads and writes of '0' to MSRs that are
> advertised to userspace via KVM_GET_MSR_INDEX_LIST, even if the vCPU model
> doesn't support the MSR.
> 
> E.g. running a QEMU VM with
> 
> [...]

Applied to kvm-x86 misc, thanks!

[1/1] KVM: x86: Return "unsupported" instead of "invalid" on access to unsupported PV MSR
      https://github.com/kvm-x86/linux/commit/5bb9ac186512

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https://github.com/kvm-x86/linux/tree/next