From c8a72a27e56237ae50cdd90bd87f0661343ce39f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Attila=20F=C3=BCl=C3=B6p?= <attila@fueloep.org>
Date: Thu, 19 Feb 2026 19:10:02 +0100
Subject: [PATCH] ICP: AES-GCM assembly: remove unused Gmul functions
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In the AES-GCM assembly files we are defining Gmul functions we
don't use anywhere.

Just remove the dead code.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #18226
---
 .../asm-x86_64/modes/aesni-gcm-avx2-vaes.S    | 36 -----------
 module/icp/asm-x86_64/modes/ghash-x86_64.S    | 64 -------------------
 .../icp/include/modes/gcm_asm_rename_funcs.h  |  1 -
 3 files changed, 101 deletions(-)

diff --git a/module/icp/asm-x86_64/modes/aesni-gcm-avx2-vaes.S b/module/icp/asm-x86_64/modes/aesni-gcm-avx2-vaes.S
index 52821dbb2..626f4639c 100644
--- a/module/icp/asm-x86_64/modes/aesni-gcm-avx2-vaes.S
+++ b/module/icp/asm-x86_64/modes/aesni-gcm-avx2-vaes.S
@@ -159,42 +159,6 @@ ENDBR
 
 .cfi_endproc
 SET_SIZE(gcm_init_vpclmulqdq_avx2)
-ENTRY_ALIGN(gcm_gmult_vpclmulqdq_avx2, 32)
-.cfi_startproc
-
-ENDBR
-
-
-
-	vmovdqu	(%rdi),%xmm0
-	vmovdqu	.Lbswap_mask(%rip),%xmm1
-	vmovdqu	128-16(%rsi),%xmm2
-	vmovdqu	.Lgfpoly(%rip),%xmm3
-	vpshufb	%xmm1,%xmm0,%xmm0
-
-	vpclmulqdq	$0x00,%xmm2,%xmm0,%xmm4
-	vpclmulqdq	$0x01,%xmm2,%xmm0,%xmm5
-	vpclmulqdq	$0x10,%xmm2,%xmm0,%xmm6
-	vpxor	%xmm6,%xmm5,%xmm5
-	vpclmulqdq	$0x01,%xmm4,%xmm3,%xmm6
-	vpshufd	$0x4e,%xmm4,%xmm4
-	vpxor	%xmm4,%xmm5,%xmm5
-	vpxor	%xmm6,%xmm5,%xmm5
-	vpclmulqdq	$0x11,%xmm2,%xmm0,%xmm0
-	vpclmulqdq	$0x01,%xmm5,%xmm3,%xmm4
-	vpshufd	$0x4e,%xmm5,%xmm5
-	vpxor	%xmm5,%xmm0,%xmm0
-	vpxor	%xmm4,%xmm0,%xmm0
-
-
-	vpshufb	%xmm1,%xmm0,%xmm0
-	vmovdqu	%xmm0,(%rdi)
-
-
-	RET
-
-.cfi_endproc
-SET_SIZE(gcm_gmult_vpclmulqdq_avx2)
 ENTRY_ALIGN(gcm_ghash_vpclmulqdq_avx2, 32)
 .cfi_startproc
 
diff --git a/module/icp/asm-x86_64/modes/ghash-x86_64.S b/module/icp/asm-x86_64/modes/ghash-x86_64.S
index 6c5bbf0fb..8295f91d2 100644
--- a/module/icp/asm-x86_64/modes/ghash-x86_64.S
+++ b/module/icp/asm-x86_64/modes/ghash-x86_64.S
@@ -103,63 +103,6 @@
 
 .text
 
-/* Windows userland links with OpenSSL */
-#if !defined (_WIN32) || defined (_KERNEL)
-ENTRY_ALIGN(gcm_gmult_clmul, 16)
-
-.cfi_startproc
-	ENDBR
-
-.L_gmult_clmul:
-	movdqu	(%rdi),%xmm0
-	movdqa	.Lbswap_mask(%rip),%xmm5
-	movdqu	(%rsi),%xmm2
-	movdqu	32(%rsi),%xmm4
-.byte	102,15,56,0,197
-	movdqa	%xmm0,%xmm1
-	pshufd	$78,%xmm0,%xmm3
-	pxor	%xmm0,%xmm3
-.byte	102,15,58,68,194,0
-.byte	102,15,58,68,202,17
-.byte	102,15,58,68,220,0
-	pxor	%xmm0,%xmm3
-	pxor	%xmm1,%xmm3
-
-	movdqa	%xmm3,%xmm4
-	psrldq	$8,%xmm3
-	pslldq	$8,%xmm4
-	pxor	%xmm3,%xmm1
-	pxor	%xmm4,%xmm0
-
-	movdqa	%xmm0,%xmm4
-	movdqa	%xmm0,%xmm3
-	psllq	$5,%xmm0
-	pxor	%xmm0,%xmm3
-	psllq	$1,%xmm0
-	pxor	%xmm3,%xmm0
-	psllq	$57,%xmm0
-	movdqa	%xmm0,%xmm3
-	pslldq	$8,%xmm0
-	psrldq	$8,%xmm3
-	pxor	%xmm4,%xmm0
-	pxor	%xmm3,%xmm1
-
-
-	movdqa	%xmm0,%xmm4
-	psrlq	$1,%xmm0
-	pxor	%xmm4,%xmm1
-	pxor	%xmm0,%xmm4
-	psrlq	$5,%xmm0
-	pxor	%xmm4,%xmm0
-	psrlq	$1,%xmm0
-	pxor	%xmm1,%xmm0
-.byte	102,15,56,0,197
-	movdqu	%xmm0,(%rdi)
-	RET
-.cfi_endproc
-SET_SIZE(gcm_gmult_clmul)
-#endif /* !_WIN32 || _KERNEL */
-
 ENTRY_ALIGN(gcm_init_htab_avx, 32)
 .cfi_startproc
 	ENDBR
@@ -272,13 +215,6 @@ ENTRY_ALIGN(gcm_init_htab_avx, 32)
 SET_SIZE(gcm_init_htab_avx)
 
 #if !defined (_WIN32) || defined (_KERNEL)
-ENTRY_ALIGN(gcm_gmult_avx, 32)
-.cfi_startproc
-	ENDBR
-	jmp	.L_gmult_clmul
-.cfi_endproc
-SET_SIZE(gcm_gmult_avx)
-
 ENTRY_ALIGN(gcm_ghash_avx, 32)
 .cfi_startproc
 	ENDBR
diff --git a/module/icp/include/modes/gcm_asm_rename_funcs.h b/module/icp/include/modes/gcm_asm_rename_funcs.h
index 08c51aeed..5e88921cf 100644
--- a/module/icp/include/modes/gcm_asm_rename_funcs.h
+++ b/module/icp/include/modes/gcm_asm_rename_funcs.h
@@ -33,7 +33,6 @@
 
 /* module/icp/asm-x86_64/modes/aesni-gcm-avx2-vaes.S */
 #define	gcm_init_vpclmulqdq_avx2	icp_gcm_init_vpclmulqdq_avx2
-#define	gcm_gmult_vpclmulqdq_avx2	icp_gcm_gmult_vpclmulqdq_avx2
 #define	gcm_ghash_vpclmulqdq_avx2	icp_gcm_ghash_vpclmulqdq_avx2
 #define	aes_gcm_enc_update_vaes_avx2	icp_aes_gcm_enc_update_vaes_avx2
 #define	aes_gcm_dec_update_vaes_avx2	icp_aes_gcm_dec_update_vaes_avx2