From 1c43c0f1f84aa59dfc98ce66f0a67b2922aa7f9d Mon Sep 17 00:00:00 2001 From: Roxana Nicolescu Date: Fri, 15 Sep 2023 12:23:25 +0200 Subject: crypto: x86/sha - load modules based on CPU features x86 optimized crypto modules are built as modules rather than build-in and they are not loaded when the crypto API is initialized, resulting in the generic builtin module (sha1-generic) being used instead. It was discovered when creating a sha1/sha256 checksum of a 2Gb file by using kcapi-tools because it would take significantly longer than creating a sha512 checksum of the same file. trace-cmd showed that for sha1/256 the generic module was used, whereas for sha512 the optimized module was used instead. Add module aliases() for these x86 optimized crypto modules based on CPU feature bits so udev gets a chance to load them later in the boot process. This resulted in ~3x decrease in the real-time execution of kcapi-dsg. Fix is inspired from commit aa031b8f702e ("crypto: x86/sha512 - load based on CPU features") where a similar fix was done for sha512. Cc: stable@vger.kernel.org # 5.15+ Suggested-by: Dimitri John Ledkov Suggested-by: Julian Andres Klode Signed-off-by: Roxana Nicolescu Signed-off-by: Herbert Xu --- arch/x86/crypto/sha256_ssse3_glue.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/x86/crypto/sha256_ssse3_glue.c') diff --git a/arch/x86/crypto/sha256_ssse3_glue.c b/arch/x86/crypto/sha256_ssse3_glue.c index 3a5f6be7dbba..d25235f0ccaf 100644 --- a/arch/x86/crypto/sha256_ssse3_glue.c +++ b/arch/x86/crypto/sha256_ssse3_glue.c @@ -38,11 +38,20 @@ #include #include #include +#include #include asmlinkage void sha256_transform_ssse3(struct sha256_state *state, const u8 *data, int blocks); +static const struct x86_cpu_id module_cpu_ids[] = { + X86_MATCH_FEATURE(X86_FEATURE_AVX2, NULL), + X86_MATCH_FEATURE(X86_FEATURE_AVX, NULL), + X86_MATCH_FEATURE(X86_FEATURE_SSSE3, NULL), + {} +}; +MODULE_DEVICE_TABLE(x86cpu, module_cpu_ids); + static int _sha256_update(struct shash_desc *desc, const u8 *data, unsigned int len, sha256_block_fn *sha256_xform) { @@ -366,6 +375,9 @@ static inline void unregister_sha256_ni(void) { } static int __init sha256_ssse3_mod_init(void) { + if (!x86_match_cpu(module_cpu_ids)) + return -ENODEV; + if (register_sha256_ssse3()) goto fail; -- cgit