Re: [PATCH 50/62] x86/sev-es: Handle VMMCALL Events

[Andy Lutomirski]

> On Feb 11, 2020, at 5:53 AM, Joerg Roedel <joro@xxxxxxxxxx> wrote:
> 
> ïFrom: Tom Lendacky <thomas.lendacky@xxxxxxx>
> 
> 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 donât do VMMCALL if weâre a SEV-ES guest?  Otherwise we add thousands of cycles of extra latency for no good reason.