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

2022-01-13 Thread Peter Gonda via groups.io
On Mon, Jan 10, 2022 at 11:18 AM Tom Lendacky wrote: > > On 1/10/22 9:29 AM, Peter Gonda wrote: > > On Fri, Jan 7, 2022 at 3:54 PM Tom Lendacky wrote: > >> > >> On 1/7/22 11:04 AM, Peter Gonda wrote: > >>> The SEV-ES bit of Fn800-001F[EAX] - Bit 3 is used for a host to > >>> determine support for

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

2022-01-10 Thread Lendacky, Thomas via groups.io
On 1/10/22 9:29 AM, Peter Gonda wrote: On Fri, Jan 7, 2022 at 3:54 PM Tom Lendacky wrote: On 1/7/22 11:04 AM, 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

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

2022-01-10 Thread Peter Gonda via groups.io
On Fri, Jan 7, 2022 at 3:54 PM Tom Lendacky wrote: > > On 1/7/22 11:04 AM, 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

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

2022-01-09 Thread Peter Gonda via groups.io
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 determine if SEV-ES is enabled. Cc: James Bottomley Cc: Min

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

2022-01-07 Thread Lendacky, Thomas via groups.io
On 1/7/22 11:04 AM, 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 determine if SEV-ES