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Allow AESNI to be used on all processor supporting AESNI, not just Intel's This improves performance/reduced CPU usage. Tests performed: - Ran on Ivy Bridge and Ryzen and verified that AESNI is detected (crypto tests) - Ran on Ryzen, and observed 50% increased speed.

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BUG: https://bugzilla.samba.org/show_bug.cgi?id=13302

Signed-off-by: Eric Vannier <evannier@google.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Björn Jacke <bjacke@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Mar 27 13:50:09 CEST 2018 on sn-devel-144
This commit is contained in:
Eric Vannier 2018-03-22 21:32:56 -07:00 committed by Jeremy Allison
parent ce5116cfb3
commit 77d88d75f6
1 changed files with 0 additions and 16 deletions
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16
lib/crypto/aes.c
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@ -66,22 +66,6 @@ static bool has_intel_aes_instructions(void)
return (bool)has_aes_instructions;
}
__cpuid(cpuid_results, 0);
/*
* MSB LSB
* EBX = 'u' 'n' 'e' 'G'
* EDX = 'I' 'e' 'n' 'i'
* ECX = 'l' 'e' 't' 'n'
*/
if (memcmp((unsigned char *)&cpuid_results[1], "Genu", 4) != 0 ||
memcmp((unsigned char *)&cpuid_results[3],
"ineI", 4) != 0 ||
memcmp((unsigned char *)&cpuid_results[2],
"ntel", 4) != 0) {
has_aes_instructions = 0;
return (bool)has_aes_instructions;
}
__cpuid(cpuid_results, 1);
has_aes_instructions = !!(cpuid_results[2] & (1 << 25));
return (bool)has_aes_instructions;