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SubjectRe: [PATCH 50/62] x86/sev-es: Handle VMMCALL Events
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> On Feb 11, 2020, at 5:53 AM, Joerg Roedel <joro@8bytes.org> wrote:
>
> From: Tom Lendacky <thomas.lendacky@amd.com>
>
> Implement a handler for #VC exceptions caused by VMMCALL instructions.
> This patch is only a starting point, VMMCALL emulation under SEV-ES
> needs further hypervisor-specific changes to provide additional state.
>

How about we just don’t do VMMCALL if we’re a SEV-ES guest? Otherwise we add thousands of cycles of extra latency for no good reason.
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