[ck] Re: [patch v2 3/3] ck: crypto: x86/crc32c-intel Exclude low performance CRC32C instruction CPUs

Low performance CRC32C instruction CPUs expect to use the driver crc32c-generic. So remove these CPUs support from crc32c-intel. Signed-off-by: LeoLiu-oc <LeoLiu-oc(a)zhaoxin.com>

---  arch/x86/crypto/crc32c-intel_glue.c | 5 +++++  1 file changed, 5 insertions(+) diff --git a/arch/x86/crypto/crc32c-intel_glue.c b/arch/x86/crypto/crc32c-intel_glue.c index 5773e1161072..91ab14fc5167 100644 --- a/arch/x86/crypto/crc32c-intel_glue.c +++ b/arch/x86/crypto/crc32c-intel_glue.c @@ -244,6 +244,11 @@ static int __init crc32c_intel_mod_init(void)  {      if (!x86_match_cpu(crc32c_cpu_id))          return -ENODEV; + +    /* Don't merit use low performance CRC32C instruction */ +    if (boot_cpu_has(X86_FEATURE_CRC32C_LOW_PERF)) +        return -ENODEV; +  #ifdef CONFIG_X86_64      if (boot_cpu_has(X86_FEATURE_PCLMULQDQ)) {          alg.update = crc32c_pcl_intel_update;