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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-02-09 21:10:10 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-06 14:14:24 +0300 |
| commit | 87294bdb7b4b73555b0fba45da1cdecdc6a0d5a8 (patch) | |
| tree | 1a9da8387cd9b30e1ac28ca1992f45659e6d467b /arch/x86/boot | |
| parent | 4f9c403e44e5e88feb27d5e617d1adc9cc7ef684 (diff) | |
| download | linux-87294bdb7b4b73555b0fba45da1cdecdc6a0d5a8.tar.xz | |
x86/compressed: Register GHCB memory when SEV-SNP is active
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
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/sev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c index 5f2c26860df7..f31b434e2ce4 100644 --- a/arch/x86/boot/compressed/sev.c +++ b/arch/x86/boot/compressed/sev.c @@ -175,6 +175,10 @@ static bool early_setup_ghcb(void) /* Initialize lookup tables for the instruction decoder */ inat_init_tables(); + /* SNP guest requires the GHCB GPA must be registered */ + if (sev_snp_enabled()) + snp_register_ghcb_early(__pa(&boot_ghcb_page)); + return true; } |