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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.

(cherry picked from commit be525a69a6630abc83144c0a96474f2e26da7443)
This commit is contained in:
H.J. Lu 2018-07-29 06:08:59 -07:00
parent a452341529
commit 2dab17550d
4 changed files with 30 additions and 10 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
2018-07-29 H.J. Lu <hongjiu.lu@intel.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.
2018-07-29 H.J. Lu <hongjiu.lu@intel.com>
[BZ #23456]

1
NEWS
View File

@ -88,6 +88,7 @@ The following bugs are resolved with this release:
[23349] Various glibc headers no longer compatible with <linux/time.h>
[23363] stdio-common/tst-printf.c has non-free license
[23456] Wrong index_cpu_LZCNT
[23459] COMMON_CPUID_INDEX_80000001 isn't populated for Intel processors
Version 2.27

27
sysdeps/x86/cpu-features.c
View File

@ -30,6 +30,20 @@ extern void TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *)
attribute_hidden;
#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,
@ -205,6 +219,8 @@ 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;
@ -324,16 +340,9 @@ 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

@ -106,7 +106,7 @@ 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
};