x86/boot: Drop unused sev_enable() fallback

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>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20250909080631.2867579-6-ardb+git@google.com

diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index db1048621ea2eda52c346f9ee5bd9e59b6458bf5..fd855e32c9b9e9a09b566a96ae7d10a5a2556e35 100644 (file)
--- 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)