On Fri, 21 Jul 2023 16:38:58 -0700, Sean Christopherson wrote:
> Remove the superfluous flush of the current TLB in VMX's handling of
> migration of the APIC-access page, as a full TLB flush on all vCPUs will
> have already been performed in response to kvm_unmap_gfn_range() *if*
> there were SPTEs pointing at the APIC-access page. And if there were no
> valid SPTEs, then there can't possibly be TLB entries to flush.
>
> The extra flush was added by commit fb6c81984313 ("kvm: vmx: Flush TLB
> when the APIC-access address changes"), with the justification of "because
> the SDM says so". The SDM said, and still says:
>
> [...]
Applied to kvm-x86 vmx, thanks!
[1/1] KVM: VMX: Drop manual TLB flush when migrating vmcs.APIC_ACCESS_ADDR
https://github.com/kvm-x86/linux/commit/775bc098657b
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https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes
