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x86: Populate COMMON_CPUID_INDEX_80000001 for Intel CPUs [BZ #23459]

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Reviewed-by: Carlos O'Donell <carlos@redhat.com>

	[BZ #23459]
	* sysdeps/x86/cpu-features.c (get_extended_indices): New
	function.
	(init_cpu_features): Call get_extended_indices for both Intel
	and AMD CPUs.
	* sysdeps/x86/cpu-features.h (COMMON_CPUID_INDEX_80000001):
	Remove "for AMD" comment.
This commit is contained in:
H.J. Lu 2018-07-26 10:49:19 -07:00
parent 65d87ade1e
commit be525a69a6
2 changed files with 19 additions and 10 deletions
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27
sysdeps/x86/cpu-features.c
View File

@ -42,6 +42,20 @@ extern void TUNABLE_CALLBACK (set_x86_shstk) (tunable_val_t *)
# include <cet-tunables.h>
#endif
static void
get_extended_indices (struct cpu_features *cpu_features)
{
unsigned int eax, ebx, ecx, edx;
__cpuid (0x80000000, eax, ebx, ecx, edx);
if (eax >= 0x80000001)
__cpuid (0x80000001,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].eax,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ebx,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ecx,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].edx);
}
static void
get_common_indeces (struct cpu_features *cpu_features,
unsigned int *family, unsigned int *model,
@ -224,6 +238,8 @@ init_cpu_features (struct cpu_features *cpu_features)
get_common_indeces (cpu_features, &family, &model, &extended_model,
&stepping);
get_extended_indices (cpu_features);
if (family == 0x06)
{
model += extended_model;
@ -338,16 +354,9 @@ init_cpu_features (struct cpu_features *cpu_features)
get_common_indeces (cpu_features, &family, &model, &extended_model,
&stepping);
ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;
get_extended_indices (cpu_features);
unsigned int eax;
__cpuid (0x80000000, eax, ebx, ecx, edx);
if (eax >= 0x80000001)
__cpuid (0x80000001,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].eax,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ebx,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].ecx,
cpu_features->cpuid[COMMON_CPUID_INDEX_80000001].edx);
ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;
if (HAS_ARCH_FEATURE (AVX_Usable))
{

2
sysdeps/x86/cpu-features.h
View File

@ -108,7 +108,7 @@ enum
{
COMMON_CPUID_INDEX_1 = 0,
COMMON_CPUID_INDEX_7,
COMMON_CPUID_INDEX_80000001, /* for AMD */
COMMON_CPUID_INDEX_80000001,
/* Keep the following line at the end. */
COMMON_CPUID_INDEX_MAX
};