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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-03-28 22:17:12 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-05-08 11:49:29 +0200 |
| commit | f710ac5442f630a7b8dc25e30e25d30a4a38e796 (patch) | |
| tree | 62304921f676d4b23950c9d2e8740249eb25aaea /arch/x86/include/asm/sev.h | |
| parent | 1eaf282e2c7d062a946980758df013f09f934a54 (diff) | |
| download | lwn-f710ac5442f630a7b8dc25e30e25d30a4a38e796.tar.gz lwn-f710ac5442f630a7b8dc25e30e25d30a4a38e796.zip | |
x86/sev: Get rid of special sev_es_enable_key
A SEV-ES guest is active on AMD when CC_ATTR_GUEST_STATE_ENCRYPT is set.
I.e., MSR_AMD64_SEV, bit 1, SEV_ES_Enabled. So no need for a special
static key.
No functional changes.
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20230328201712.25852-3-bp@alien8.de
Diffstat (limited to 'arch/x86/include/asm/sev.h')
| -rw-r--r-- | arch/x86/include/asm/sev.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 13dc2a9d23c1..f14060cbead2 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -14,6 +14,7 @@ #include <asm/insn.h> #include <asm/sev-common.h> #include <asm/bootparam.h> +#include <asm/coco.h> #define GHCB_PROTOCOL_MIN 1ULL #define GHCB_PROTOCOL_MAX 2ULL @@ -136,24 +137,26 @@ struct snp_secrets_page_layout { } __packed; #ifdef CONFIG_AMD_MEM_ENCRYPT -extern struct static_key_false sev_es_enable_key; extern void __sev_es_ist_enter(struct pt_regs *regs); extern void __sev_es_ist_exit(void); static __always_inline void sev_es_ist_enter(struct pt_regs *regs) { - if (static_branch_unlikely(&sev_es_enable_key)) + if (cc_vendor == CC_VENDOR_AMD && + cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT)) __sev_es_ist_enter(regs); } static __always_inline void sev_es_ist_exit(void) { - if (static_branch_unlikely(&sev_es_enable_key)) + if (cc_vendor == CC_VENDOR_AMD && + cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT)) __sev_es_ist_exit(); } extern int sev_es_setup_ap_jump_table(struct real_mode_header *rmh); extern void __sev_es_nmi_complete(void); static __always_inline void sev_es_nmi_complete(void) { - if (static_branch_unlikely(&sev_es_enable_key)) + if (cc_vendor == CC_VENDOR_AMD && + cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT)) __sev_es_nmi_complete(); } extern int __init sev_es_efi_map_ghcbs(pgd_t *pgd); |