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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-06-05 10:18:48 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-17 20:42:56 +0200 |
| commit | d2b2931f19e48c9148909c2f45bccf21a8a83cfb (patch) | |
| tree | 40a86fb741fd28ddccdbd5d67c3f74fd34d5b0a7 /arch/x86/include/asm/sev.h | |
| parent | fcd042e86422442f999feae96f34a408555be248 (diff) | |
| download | lwn-d2b2931f19e48c9148909c2f45bccf21a8a83cfb.tar.gz lwn-d2b2931f19e48c9148909c2f45bccf21a8a83cfb.zip | |
x86/sev: Use the SVSM to create a vCPU when not in VMPL0
Using the RMPADJUST instruction, the VMSA attribute can only be changed
at VMPL0. An SVSM will be present when running at VMPL1 or a lower
privilege level.
In that case, use the SVSM_CORE_CREATE_VCPU call or the
SVSM_CORE_DESTROY_VCPU call to perform VMSA attribute changes. Use the
VMPL level supplied by the SVSM for the VMSA when starting the AP.
[ bp: Fix typo + touchups. ]
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/bcdd95ecabe9723673b9693c7f1533a2b8f17781.1717600736.git.thomas.lendacky@amd.com
Diffstat (limited to 'arch/x86/include/asm/sev.h')
| -rw-r--r-- | arch/x86/include/asm/sev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 874295a8c23b..1d0b1b23fafb 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -233,6 +233,8 @@ struct svsm_call { #define SVSM_CORE_CALL(x) ((0ULL << 32) | (x)) #define SVSM_CORE_REMAP_CA 0 #define SVSM_CORE_PVALIDATE 1 +#define SVSM_CORE_CREATE_VCPU 2 +#define SVSM_CORE_DELETE_VCPU 3 #ifdef CONFIG_AMD_MEM_ENCRYPT extern void __sev_es_ist_enter(struct pt_regs *regs); |