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| author | Michael Roth <michael.roth@amd.com> | 2022-02-24 10:56:14 -0600 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-07 16:47:11 +0200 |
| commit | c01fce9cef8491974f7f007f90281f1608400768 (patch) | |
| tree | e11fa8b3ac356e3247c3bb1ab1338c16753c78f4 /arch/x86/include/asm/sev.h | |
| parent | 8c9c509baf660f1062bc758c26008b7f9bbc39f3 (diff) | |
| download | lwn-c01fce9cef8491974f7f007f90281f1608400768.tar.gz lwn-c01fce9cef8491974f7f007f90281f1608400768.zip | |
x86/compressed: Add SEV-SNP feature detection/setup
Initial/preliminary detection of SEV-SNP is done via the Confidential
Computing blob. Check for it prior to the normal SEV/SME feature
initialization, and add some sanity checks to confirm it agrees with
SEV-SNP CPUID/MSR bits.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-35-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/include/asm/sev.h')
| -rw-r--r-- | arch/x86/include/asm/sev.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 8c934bda2a90..31b3b10323b6 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -11,6 +11,7 @@ #include <linux/types.h> #include <asm/insn.h> #include <asm/sev-common.h> +#include <asm/bootparam.h> #define GHCB_PROTOCOL_MIN 1ULL #define GHCB_PROTOCOL_MAX 2ULL @@ -151,6 +152,7 @@ void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op void snp_set_memory_shared(unsigned long vaddr, unsigned int npages); void snp_set_memory_private(unsigned long vaddr, unsigned int npages); void snp_set_wakeup_secondary_cpu(void); +bool snp_init(struct boot_params *bp); #else static inline void sev_es_ist_enter(struct pt_regs *regs) { } static inline void sev_es_ist_exit(void) { } @@ -168,6 +170,7 @@ static inline void __init snp_prep_memory(unsigned long paddr, unsigned int sz, static inline void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) { } static inline void snp_set_memory_private(unsigned long vaddr, unsigned int npages) { } static inline void snp_set_wakeup_secondary_cpu(void) { } +static inline bool snp_init(struct boot_params *bp) { return false; } #endif #endif |