[PATCH v4 1/3] x86/boot: Drop unused sev_enable() fallback

Ard Biesheuvel
2025-09-09T08:06:47Z

From: Ard Biesheuvel <ardb@kernel.org>

The misc.h header is not included by the EFI stub, which is the only C
caller of sev_enable(). This means the fallback for cases where
CONFIG_AMD_MEM_ENCRYPT is not set is never used, so it can be dropped.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/x86/boot/compressed/misc.h | 11 -----------
1 file changed, 11 deletions(-)

diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index db1048621ea2..fd855e32c9b9 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -152,17 +152,6 @@ bool insn_has_rep_prefix(struct insn *insn);
void sev_insn_decode_init(void);
bool early_setup_ghcb(void);
#else
-static inline void sev_enable(struct boot_params *bp)
-{
- /*
- * bp->cc_blob_address should only be set by boot/compressed kernel.
- * Initialize it to 0 unconditionally (thus here in this stub too) to
- * ensure that uninitialized values from buggy bootloaders aren't
- * propagated.
- */
- if (bp)
- bp->cc_blob_address = 0;
-}
static inline void snp_check_features(void) { }
static inline void sev_es_shutdown_ghcb(void) { }
static inline bool sev_es_check_ghcb_fault(unsigned long address)
--
2.51.0.384.g4c02a37b29-goog