Re: [edk2-devel] [PATCH V3] OvmfPkg/ResetVector: Removing SEV-ES CPUID bit check

2022-06-01 Thread Lendacky, Thomas via groups.io
On 6/1/22 07:25, Ard Biesheuvel wrote: On Tue, 31 May 2022 at 16:40, Peter Gonda wrote: The SEV-ES bit of Fn800-001F[EAX] - Bit 3 is used for a host to determine support for running SEV-ES guests. It should not be checked by a guest to determine if it is running under SEV-ES. The guest should

Re: [edk2-devel] [PATCH V3] OvmfPkg/ResetVector: Removing SEV-ES CPUID bit check

2022-06-01 Thread Ard Biesheuvel
On Tue, 31 May 2022 at 16:40, Peter Gonda wrote: > > The SEV-ES bit of Fn800-001F[EAX] - Bit 3 is used for a host to > determine support for running SEV-ES guests. It should not be checked by > a guest to determine if it is running under SEV-ES. The guest should use > the SEV_STATUS MSR Bit 1 to