Re: [PATCH v3 40/75] x86/sev-es: Compile early handler code into kernel image

Borislav Petkov
2020-06-04T15:20:04Z

On Thu, Jun 04, 2020 at 01:54:13PM +0200, Joerg Roedel wrote:
> It is not only the trace-point, this would also eliminate exception
> handling in case the MSR access triggers a #GP. The "Unhandled MSR
> read/write" messages would turn into a "General Protection Fault"
> message.

But the early ones can trigger a #GP too. And there we can't handle
those #GPs.

Why would the late ones need exception handling all of a sudden? And
for the GHCB MSR, of all MSRs which the SEV-ES guest has used so far to
bootstrap?!

--
Regards/Gruss,
Boris.