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    Subject[PATCH v3 15/17] crypto: x86/sm3 - load based on CPU features
    Date
    Like commit aa031b8f702e ("crypto: x86/sha512 - load based on CPU
    features"), add module aliases for x86-optimized crypto modules:
    sm3
    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>
    ---
    arch/x86/crypto/sm3_avx_glue.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/arch/x86/crypto/sm3_avx_glue.c b/arch/x86/crypto/sm3_avx_glue.c
    index 483aaed996ba..26256cc0cbb6 100644
    --- a/arch/x86/crypto/sm3_avx_glue.c
    +++ b/arch/x86/crypto/sm3_avx_glue.c
    @@ -15,6 +15,7 @@
    #include <linux/types.h>
    #include <crypto/sm3.h>
    #include <crypto/sm3_base.h>
    +#include <asm/cpu_device_id.h>
    #include <asm/simd.h>

    /* avoid kernel_fpu_begin/end scheduler/rcu stalls */
    @@ -119,10 +120,19 @@ static struct shash_alg sm3_avx_alg = {
    }
    };

    +static const struct x86_cpu_id module_cpu_ids[] = {
    + X86_MATCH_FEATURE(X86_FEATURE_AVX, NULL),
    + {}
    +};
    +MODULE_DEVICE_TABLE(x86cpu, module_cpu_ids);
    +
    static int __init sm3_avx_mod_init(void)
    {
    const char *feature_name;

    + if (!x86_match_cpu(module_cpu_ids))
    + return -ENODEV;
    +
    if (!boot_cpu_has(X86_FEATURE_AVX)) {
    pr_info("AVX instruction are not detected.\n");
    return -ENODEV;
    --
    2.37.3
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