Re: [PATCH v8 11/40] x86/sev: Register GHCB memory when SEV-SNP is active

Venu Busireddy
2022-01-03T22:48:44Z

On 2021-12-10 09:43:03 -0600, Brijesh Singh wrote:
> The SEV-SNP guest is required by the GHCB spec to register the GHCB's
> Guest Physical Address (GPA). This is because the hypervisor may prefer
> that a guest use a consistent and/or specific GPA for the GHCB associated
> with a vCPU. For more information, see the GHCB specification section
> "GHCB GPA Registration".
>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>

Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>

> ---
> arch/x86/include/asm/sev.h | 2 +
> arch/x86/kernel/cpu/common.c | 4 ++
> arch/x86/kernel/head64.c | 1 +
> arch/x86/kernel/sev-shared.c | 2 +-
> arch/x86/kernel/sev.c | 120 ++++++++++++++++++++---------------
> 5 files changed, 77 insertions(+), 52 deletions(-)
>