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Update family and model detection for AMD CPUs

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AMD CPUs uses the similar encoding scheme for extended family and model
as Intel CPUs as shown in:

http://support.amd.com/TechDocs/25481.pdf

This patch updates get_common_indeces to get family and model for both
Intel and AMD CPUs when family == 0x0f.

	[BZ #19214]
	* sysdeps/x86/cpu-features.c (get_common_indeces): Add an
	argument to return extended model.  Update family and model
	with extended family and model when family == 0x0f.
	(init_cpu_features): Updated.
This commit is contained in:
H.J. Lu 2015-11-30 08:53:37 -08:00
parent 5f75f6bdf8
commit 9627da32ec
2 changed files with 23 additions and 12 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2015-11-30 Amit Pawar <amit.pawar@amd.com>
[BZ #19214]
* sysdeps/x86/cpu-features.c (get_common_indeces): Add an
argument to return extended model. Update family and model
with extended family and model when family == 0x0f.
(init_cpu_features): Updated.
2015-11-29 Samuel Thibault <samuel.thibault@ens-lyon.org>
The RPC interface used by mmap uses the unsigned vm_offset_t, not the

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

@ -21,7 +21,8 @@
static inline void
get_common_indeces (struct cpu_features *cpu_features,
unsigned int *family, unsigned int *model)
unsigned int *family, unsigned int *model,
unsigned int *extended_model)
{
unsigned int eax;
__cpuid (1, eax, cpu_features->cpuid[COMMON_CPUID_INDEX_1].ebx,
@ -30,6 +31,12 @@ get_common_indeces (struct cpu_features *cpu_features,
GLRO(dl_x86_cpu_features).cpuid[COMMON_CPUID_INDEX_1].eax = eax;
*family = (eax >> 8) & 0x0f;
*model = (eax >> 4) & 0x0f;
*extended_model = (eax >> 12) & 0xf0;
if (*family == 0x0f)
{
*family += (eax >> 20) & 0xff;
*model += *extended_model;
}
}
static inline void
@ -53,19 +60,13 @@ init_cpu_features (struct cpu_features *cpu_features)
/* This spells out "GenuineIntel". */
if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
{
unsigned int extended_model;
kind = arch_kind_intel;
get_common_indeces (cpu_features, &family, &model);
get_common_indeces (cpu_features, &family, &model, &extended_model);
unsigned int eax = cpu_features->cpuid[COMMON_CPUID_INDEX_1].eax;
unsigned int extended_family = (eax >> 20) & 0xff;
unsigned int extended_model = (eax >> 12) & 0xf0;
if (family == 0x0f)
{
family += extended_family;
model += extended_model;
}
else if (family == 0x06)
if (family == 0x06)
{
ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;
model += extended_model;
@ -132,9 +133,11 @@ init_cpu_features (struct cpu_features *cpu_features)
/* This spells out "AuthenticAMD". */
else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
{
unsigned int extended_model;
kind = arch_kind_amd;
get_common_indeces (cpu_features, &family, &model);
get_common_indeces (cpu_features, &family, &model, &extended_model);
ecx = cpu_features->cpuid[COMMON_CPUID_INDEX_1].ecx;