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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-09-15 05:49:27 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-09-16 05:56:10 -0700 |
| commit | f2c679d4b2c73a95f437c705f960a4af1fa23498 (patch) | |
| tree | 1f30bd0a05a25caa79dda87c9330fb7c6de901bd /sysdeps/x86/cpu-features.c | |
| parent | a140ff9162f353e804d6a8c83c8f3c18511850dd (diff) | |
| download | glibc-f2c679d4b2c73a95f437c705f960a4af1fa23498.zip glibc-f2c679d4b2c73a95f437c705f960a4af1fa23498.tar.gz glibc-f2c679d4b2c73a95f437c705f960a4af1fa23498.tar.bz2 | |
<sys/platform/x86.h>: Add Intel Key Locker support
Add Intel Key Locker:
https://software.intel.com/content/www/us/en/develop/download/intel-key-locker-specification.html
support to <sys/platform/x86.h>. Intel Key Locker has
1. KL: AES Key Locker instructions.
2. WIDE_KL: AES wide Key Locker instructions.
3. AESKLE: AES Key Locker instructions are enabled by OS.
Applications should use
if (CPU_FEATURE_USABLE (KL))
and
if (CPU_FEATURE_USABLE (WIDE_KL))
to check if AES Key Locker instructions and AES wide Key Locker
instructions are usable.
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index b0ded20..a9945b9 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -269,6 +269,14 @@ update_usable (struct cpu_features *cpu_features) /* Determine if PKU is usable. */ if (CPU_FEATURES_CPU_P (cpu_features, OSPKE)) CPU_FEATURE_SET (cpu_features, PKU); + + /* Determine if Key Locker instructions are usable. */ + if (CPU_FEATURES_CPU_P (cpu_features, AESKLE)) + { + CPU_FEATURE_SET (cpu_features, AESKLE); + CPU_FEATURE_SET_USABLE (cpu_features, KL); + CPU_FEATURE_SET_USABLE (cpu_features, WIDE_KL); + } } static void @@ -341,6 +349,12 @@ get_common_indices (struct cpu_features *cpu_features, cpu_features->features[COMMON_CPUID_INDEX_D_ECX_1].cpuid.ecx, cpu_features->features[COMMON_CPUID_INDEX_D_ECX_1].cpuid.edx); + if (cpu_features->basic.max_cpuid >= 0x19) + __cpuid_count (0x19, 0, + cpu_features->features[COMMON_CPUID_INDEX_19].cpuid.eax, + cpu_features->features[COMMON_CPUID_INDEX_19].cpuid.ebx, + cpu_features->features[COMMON_CPUID_INDEX_19].cpuid.ecx, + cpu_features->features[COMMON_CPUID_INDEX_19].cpuid.edx); } _Static_assert (((index_arch_Fast_Unaligned_Load |