diff options
| author |   Robert Elliott <elliott@hpe.com> | 2022-08-13 18:04:31 -0500 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2022-08-19 18:39:39 +0800 |
| commit | aa031b8f702e7941b4c86022348a366c335d389a (patch) | |
| tree | 0182a578d0b37f1308e90e322cea93e042dfd9e6 /arch/x86/crypto | |
| parent | crypto: hisilicon/qm - remove unneeded hardware cache write back (diff) | |
| download | linux-dev-aa031b8f702e7941b4c86022348a366c335d389a.tar.xz linux-dev-aa031b8f702e7941b4c86022348a366c335d389a.zip | |
crypto: x86/sha512 - load based on CPU features
x86 optimized crypto modules built as modules rather than built-in
to the kernel end up as .ko files in the filesystem, e.g., in
/usr/lib/modules. If the filesystem itself is a module, these might
not be available when the crypto API is initialized, resulting in
the generic implementation being used (e.g., sha512_transform rather
than sha512_transform_avx2).
In one test case, CPU utilization in the sha512 function dropped
from 15.34% to 7.18% after forcing loading of the optimized module.
Add module aliases for this x86 optimized crypto module based on CPU
feature bits so udev gets a chance to load them later in the boot
process when the filesystems are all running.
Signed-off-by: Robert Elliott <elliott@hpe.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/sha512_ssse3_glue.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/crypto/sha512_ssse3_glue.c b/arch/x86/crypto/sha512_ssse3_glue.c index 30e70f4fe2f7..6d3b85e53d0e 100644 --- a/arch/x86/crypto/sha512_ssse3_glue.c +++ b/arch/x86/crypto/sha512_ssse3_glue.c @@ -36,6 +36,7 @@ #include <linux/types.h> #include <crypto/sha2.h> #include <crypto/sha512_base.h> +#include <asm/cpu_device_id.h> #include <asm/simd.h> asmlinkage void sha512_transform_ssse3(struct sha512_state *state, @@ -284,6 +285,13 @@ static int register_sha512_avx2(void) ARRAY_SIZE(sha512_avx2_algs)); return 0; } +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 void unregister_sha512_avx2(void) { @@ -294,6 +302,8 @@ static void unregister_sha512_avx2(void) static int __init sha512_ssse3_mod_init(void) { + if (!x86_match_cpu(module_cpu_ids)) + return -ENODEV; if (register_sha512_ssse3()) goto fail; |