From: Eric Biggers <ebiggers@kernel.org>
To: linux-crypto@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
"Jason A . Donenfeld" <Jason@zx2c4.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
x86@kernel.org, Eric Biggers <ebiggers@kernel.org>
Subject: [PATCH] lib/crypto: x86/chacha: Drop redundant check for AVX
Date: Wed, 11 Nov 2026 12:15:17 -0800 [thread overview]
Message-ID: <20261111201517.39989-1-ebiggers@kernel.org> (raw)
X86_FEATURE_AVX2 implies X86_FEATURE_AVX. Simplify
chacha_mod_init_arch() accordingly.
(Note: as usual, arch/x86/kernel/cpu/cpuid-deps.c is non-enforcing: if a
dependency isn't met, it warns and doesn't prevent booting. However,
that case doesn't occur in real CPUs and is unsupported.)
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
---
lib/crypto/x86/chacha.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/lib/crypto/x86/chacha.h b/lib/crypto/x86/chacha.h
index 76cddc522fa04..3e465184ca87b 100644
--- a/lib/crypto/x86/chacha.h
+++ b/lib/crypto/x86/chacha.h
@@ -188,8 +188,7 @@ static void chacha_mod_init_arch(void)
static_branch_enable(&chacha_use_simd);
- if (boot_cpu_has(X86_FEATURE_AVX) &&
- boot_cpu_has(X86_FEATURE_AVX2)) {
+ if (boot_cpu_has(X86_FEATURE_AVX2)) {
static_branch_enable(&chacha_use_avx2);
if (boot_cpu_has(X86_FEATURE_AVX512VL) &&
base-commit: 33b4f31b1aea3f62b61c892daefc0e6a77859032
--
2.56.1
reply other threads:[~2026-11-11 20:15 UTC|newest]
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