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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-02-09 12:10:11 -0600 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-06 13:16:58 +0200 |
| commit | 95d33bfaa3e169cfec1926e0d0f0c6b0ea75d763 (patch) | |
| tree | 42be2b1c8f9cb14f8a690f5be725dbc0511a6fc3 /arch/x86/kernel/cpu/common.c | |
| parent | 87294bdb7b4b73555b0fba45da1cdecdc6a0d5a8 (diff) | |
| download | linux-95d33bfaa3e169cfec1926e0d0f0c6b0ea75d763.tar.gz linux-95d33bfaa3e169cfec1926e0d0f0c6b0ea75d763.tar.bz2 linux-95d33bfaa3e169cfec1926e0d0f0c6b0ea75d763.zip | |
x86/sev: 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 uses a consistent and/or specific GPA for the GHCB associated
with a vCPU. For more information, see the GHCB specification section
"GHCB GPA Registration".
[ bp: Cleanup comments. ]
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-18-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index ed4417500700..9e4552133872 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -60,6 +60,7 @@ #include <asm/uv/uv.h> #include <asm/sigframe.h> #include <asm/traps.h> +#include <asm/sev.h> #include "cpu.h" @@ -2124,6 +2125,9 @@ void cpu_init_exception_handling(void) load_TR_desc(); + /* GHCB needs to be setup to handle #VC. */ + setup_ghcb(); + /* Finally load the IDT */ load_current_idt(); } |