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SubjectRe: [PATCH] x86/hyper-v: implement EOI assist
Vitaly Kuznetsov <> writes:

> Hyper-V TLFS suggests an optimization to avoid imminent VMExit on EOI:
> "The OS performs an EOI by atomically writing zero to the EOI Assist field
> of the virtual VP assist page and checking whether the "No EOI required"
> field was previously zero. If it was, the OS must write to the
> HV_X64_APIC_EOI MSR thereby triggering an intercept into the hypervisor."
> Implement the optimization in Linux.

Simon, Long,

did you get a chance to run some tests with this?


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