x86/compressed: Register GHCB memory when SEV-SNP is active

Browse source

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".

If hypervisor can not work with the guest provided GPA then terminate the
guest boot.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Link: https://lore.kernel.org/r/20220307213356.2797205-17-brijesh.singh@amd.com

...

This commit is contained in:

Brijesh Singh 2022-02-09 12:10:10 -06:00 • committed by Borislav Petkov

parent 4f9c403e44

commit 87294bdb7b

3 changed files with 33 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

arch/x86/boot/compressed/sev.c

View file

13

arch/x86/include/asm/sev-common.h

View file

16

arch/x86/kernel/sev-shared.c

View file