[PATCH 3/3] crypto: x86 - Remove CONFIG_AS_AVX512

[Uros Bizjak <ubizjak@gmail.com>]

Current minimum required version of binutils is 2.25,
which supports AVX-512 instruction mnemonics.

Remove check for assembler support of AVX-512 instructions
and all relevant macros for conditional compilation.

No functional change intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
 arch/x86/Kconfig.assembler                    | 5 -----
 arch/x86/crypto/Kconfig                       | 2 +-
 arch/x86/crypto/Makefile                      | 3 +--
 arch/x86/crypto/blake2s-core.S                | 4 ----
 arch/x86/crypto/blake2s-glue.c                | 6 ++----
 arch/x86/crypto/chacha_glue.c                 | 6 ++----
 arch/x86/crypto/poly1305-x86_64-cryptogams.pl | 8 --------
 arch/x86/crypto/poly1305_glue.c               | 6 +++---
 8 files changed, 9 insertions(+), 31 deletions(-)

diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler
index 4d06fd3c8dfe..d149a0ee371a 100644
--- a/arch/x86/Kconfig.assembler
+++ b/arch/x86/Kconfig.assembler
@@ -1,11 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 # Copyright (C) 2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 
-config AS_AVX512
-	def_bool $(as-instr,vpmovm2b %k1$(comma)%zmm5)
-	help
-	  Supported by binutils >= 2.25 and LLVM integrated assembler
-
 config AS_TPAUSE
 	def_bool $(as-instr,tpause %ecx)
 	help
diff --git a/arch/x86/crypto/Kconfig b/arch/x86/crypto/Kconfig
index 3d948f10c94c..547bb0db9217 100644
--- a/arch/x86/crypto/Kconfig
+++ b/arch/x86/crypto/Kconfig
@@ -332,7 +332,7 @@ config CRYPTO_ARIA_AESNI_AVX2_X86_64
 
 config CRYPTO_ARIA_GFNI_AVX512_X86_64
 	tristate "Ciphers: ARIA with modes: ECB, CTR (AVX512/GFNI)"
-	depends on X86 && 64BIT && AS_AVX512 && AS_GFNI
+	depends on X86 && 64BIT && AS_GFNI
 	select CRYPTO_SKCIPHER
 	select CRYPTO_SIMD
 	select CRYPTO_ALGAPI
diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index e06b739176c9..2f22b381f244 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -43,8 +43,7 @@ obj-$(CONFIG_CRYPTO_AEGIS128_AESNI_SSE2) += aegis128-aesni.o
 aegis128-aesni-y := aegis128-aesni-asm.o aegis128-aesni-glue.o
 
 obj-$(CONFIG_CRYPTO_CHACHA20_X86_64) += chacha-x86_64.o
-chacha-x86_64-y := chacha-avx2-x86_64.o chacha-ssse3-x86_64.o chacha_glue.o
-chacha-x86_64-$(CONFIG_AS_AVX512) += chacha-avx512vl-x86_64.o
+chacha-x86_64-y := chacha-avx2-x86_64.o chacha-ssse3-x86_64.o chacha-avx512vl-x86_64.o chacha_glue.o
 
 obj-$(CONFIG_CRYPTO_AES_NI_INTEL) += aesni-intel.o
 aesni-intel-y := aesni-intel_asm.o aesni-intel_glue.o
diff --git a/arch/x86/crypto/blake2s-core.S b/arch/x86/crypto/blake2s-core.S
index b50b35ff1fdb..ac1c845445a4 100644
--- a/arch/x86/crypto/blake2s-core.S
+++ b/arch/x86/crypto/blake2s-core.S
@@ -29,7 +29,6 @@ SIGMA:
 .byte 13,  7, 12,  3, 11, 14,  1,  9,  2,  5, 15,  8, 10,  0,  4,  6
 .byte  6, 14, 11,  0, 15,  9,  3,  8, 10, 12, 13,  1,  5,  2,  7,  4
 .byte 10,  8,  7,  1,  2,  4,  6,  5, 13, 15,  9,  3,  0, 11, 14, 12
-#ifdef CONFIG_AS_AVX512
 .section .rodata.cst64.BLAKE2S_SIGMA2, "aM", @progbits, 640
 .align 64
 SIGMA2:
@@ -43,7 +42,6 @@ SIGMA2:
 .long  6, 13,  0, 14, 12,  2,  1, 11, 15,  4,  5,  8,  7,  9,  3, 10
 .long 15,  5,  4, 13, 10,  7,  3, 11, 12,  2,  0,  6,  9,  8,  1, 14
 .long  8,  7, 14, 11, 13, 15,  0, 12, 10,  4,  5,  6,  3,  2,  1,  9
-#endif /* CONFIG_AS_AVX512 */
 
 .text
 SYM_FUNC_START(blake2s_compress_ssse3)
@@ -174,7 +172,6 @@ SYM_FUNC_START(blake2s_compress_ssse3)
 	RET
 SYM_FUNC_END(blake2s_compress_ssse3)
 
-#ifdef CONFIG_AS_AVX512
 SYM_FUNC_START(blake2s_compress_avx512)
 	vmovdqu		(%rdi),%xmm0
 	vmovdqu		0x10(%rdi),%xmm1
@@ -253,4 +250,3 @@ SYM_FUNC_START(blake2s_compress_avx512)
 	vzeroupper
 	RET
 SYM_FUNC_END(blake2s_compress_avx512)
-#endif /* CONFIG_AS_AVX512 */
diff --git a/arch/x86/crypto/blake2s-glue.c b/arch/x86/crypto/blake2s-glue.c
index 0313f9673f56..00f84f29cc8c 100644
--- a/arch/x86/crypto/blake2s-glue.c
+++ b/arch/x86/crypto/blake2s-glue.c
@@ -41,8 +41,7 @@ void blake2s_compress(struct blake2s_state *state, const u8 *block,
 					    SZ_4K / BLAKE2S_BLOCK_SIZE);
 
 		kernel_fpu_begin();
-		if (IS_ENABLED(CONFIG_AS_AVX512) &&
-		    static_branch_likely(&blake2s_use_avx512))
+		if (static_branch_likely(&blake2s_use_avx512))
 			blake2s_compress_avx512(state, block, blocks, inc);
 		else
 			blake2s_compress_ssse3(state, block, blocks, inc);
@@ -59,8 +58,7 @@ static int __init blake2s_mod_init(void)
 	if (boot_cpu_has(X86_FEATURE_SSSE3))
 		static_branch_enable(&blake2s_use_ssse3);
 
-	if (IS_ENABLED(CONFIG_AS_AVX512) &&
-	    boot_cpu_has(X86_FEATURE_AVX) &&
+	if (boot_cpu_has(X86_FEATURE_AVX) &&
 	    boot_cpu_has(X86_FEATURE_AVX2) &&
 	    boot_cpu_has(X86_FEATURE_AVX512F) &&
 	    boot_cpu_has(X86_FEATURE_AVX512VL) &&
diff --git a/arch/x86/crypto/chacha_glue.c b/arch/x86/crypto/chacha_glue.c
index 8bb74a272879..ce12ad807af1 100644
--- a/arch/x86/crypto/chacha_glue.c
+++ b/arch/x86/crypto/chacha_glue.c
@@ -48,8 +48,7 @@ static unsigned int chacha_advance(unsigned int len, unsigned int maxblocks)
 static void chacha_dosimd(u32 *state, u8 *dst, const u8 *src,
 			  unsigned int bytes, int nrounds)
 {
-	if (IS_ENABLED(CONFIG_AS_AVX512) &&
-	    static_branch_likely(&chacha_use_avx512vl)) {
+	if (static_branch_likely(&chacha_use_avx512vl)) {
 		while (bytes >= CHACHA_BLOCK_SIZE * 8) {
 			chacha_8block_xor_avx512vl(state, dst, src, bytes,
 						   nrounds);
@@ -282,8 +281,7 @@ static int __init chacha_simd_mod_init(void)
 	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
 		static_branch_enable(&chacha_use_avx2);
 
-		if (IS_ENABLED(CONFIG_AS_AVX512) &&
-		    boot_cpu_has(X86_FEATURE_AVX512VL) &&
+		if (boot_cpu_has(X86_FEATURE_AVX512VL) &&
 		    boot_cpu_has(X86_FEATURE_AVX512BW)) /* kmovq */
 			static_branch_enable(&chacha_use_avx512vl);
 	}
diff --git a/arch/x86/crypto/poly1305-x86_64-cryptogams.pl b/arch/x86/crypto/poly1305-x86_64-cryptogams.pl
index b9abcd79c1f4..409ec6955733 100644
--- a/arch/x86/crypto/poly1305-x86_64-cryptogams.pl
+++ b/arch/x86/crypto/poly1305-x86_64-cryptogams.pl
@@ -2811,18 +2811,10 @@ if ($avx>2) {
 # reason stack layout is kept identical to poly1305_blocks_avx2. If not
 # for this tail, we wouldn't have to even allocate stack frame...
 
-if($kernel) {
-	$code .= "#ifdef CONFIG_AS_AVX512\n";
-}
-
 &declare_function("poly1305_blocks_avx512", 32, 4);
 poly1305_blocks_avxN(1);
 &end_function("poly1305_blocks_avx512");
 
-if ($kernel) {
-	$code .= "#endif\n";
-}
-
 if (!$kernel && $avx>3) {
 ########################################################################
 # VPMADD52 version using 2^44 radix.
diff --git a/arch/x86/crypto/poly1305_glue.c b/arch/x86/crypto/poly1305_glue.c
index 08ff4b489f7e..8b5593c46da7 100644
--- a/arch/x86/crypto/poly1305_glue.c
+++ b/arch/x86/crypto/poly1305_glue.c
@@ -107,7 +107,7 @@ static void poly1305_simd_blocks(void *ctx, const u8 *inp, size_t len,
 		const size_t bytes = min_t(size_t, len, SZ_4K);
 
 		kernel_fpu_begin();
-		if (IS_ENABLED(CONFIG_AS_AVX512) && static_branch_likely(&poly1305_use_avx512))
+		if (static_branch_likely(&poly1305_use_avx512))
 			poly1305_blocks_avx512(ctx, inp, bytes, padbit);
 		else if (static_branch_likely(&poly1305_use_avx2))
 			poly1305_blocks_avx2(ctx, inp, bytes, padbit);
@@ -265,8 +265,8 @@ static int __init poly1305_simd_mod_init(void)
 	if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) &&
 	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
 		static_branch_enable(&poly1305_use_avx2);
-	if (IS_ENABLED(CONFIG_AS_AVX512) && boot_cpu_has(X86_FEATURE_AVX) &&
-	    boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) &&
+	if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) &&
+	    boot_cpu_has(X86_FEATURE_AVX512F) &&
 	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_AVX512, NULL) &&
 	    /* Skylake downclocks unacceptably much when using zmm, but later generations are fast. */
 	    boot_cpu_data.x86_vfm != INTEL_SKYLAKE_X)
-- 
2.49.0