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authorH.J. Lu <hjl.tools@gmail.com>2017-06-05 16:20:00 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-06-05 16:20:11 -0700
commit48e7bc7a55ff758435e940d4f3def24acfe52cb8 (patch)
treee304efc69495073d6c5f5ae9903e011156175f9a /sysdeps/x86
parent935971ba6b4eaf67a34e4651434ba9b61e7355cc (diff)
downloadglibc-48e7bc7a55ff758435e940d4f3def24acfe52cb8.tar.gz
x86: Don't use dl_x86_cpu_features in cacheinfo.c
Since cpu_features is available, use it instead of dl_x86_cpu_features. * sysdeps/x86/cacheinfo.c (intel_check_word): Accept cpu_features and use it instead of dl_x86_cpu_features. (handle_intel): Replace maxidx with cpu_features. Pass cpu_features to intel_check_word. (__cache_sysconf): Pass cpu_features to handle_intel. (init_cacheinfo): Likewise. Use cpu_features instead of dl_x86_cpu_features.
Diffstat (limited to 'sysdeps/x86')
-rw-r--r--sysdeps/x86/cacheinfo.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c
index f66f2b86e0..8000fd1e99 100644
--- a/sysdeps/x86/cacheinfo.c
+++ b/sysdeps/x86/cacheinfo.c
@@ -126,7 +126,8 @@ intel_02_known_compare (const void *p1, const void *p2)
static long int
__attribute__ ((noinline))
intel_check_word (int name, unsigned int value, bool *has_level_2,
- bool *no_level_2_or_3)
+ bool *no_level_2_or_3,
+ const struct cpu_features *cpu_features)
{
if ((value & 0x80000000) != 0)
/* The register value is reserved. */
@@ -204,8 +205,8 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
/* Intel reused this value. For family 15, model 6 it
specifies the 3rd level cache. Otherwise the 2nd
level cache. */
- unsigned int family = GLRO(dl_x86_cpu_features).family;
- unsigned int model = GLRO(dl_x86_cpu_features).model;
+ unsigned int family = cpu_features->family;
+ unsigned int model = cpu_features->model;
if (family == 15 && model == 6)
{
@@ -255,8 +256,10 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
static long int __attribute__ ((noinline))
-handle_intel (int name, unsigned int maxidx)
+handle_intel (int name, const struct cpu_features *cpu_features)
{
+ unsigned int maxidx = cpu_features->max_cpuid;
+
/* Return -1 for older CPUs. */
if (maxidx < 2)
return -1;
@@ -287,19 +290,23 @@ handle_intel (int name, unsigned int maxidx)
}
/* Process the individual registers' value. */
- result = intel_check_word (name, eax, &has_level_2, &no_level_2_or_3);
+ result = intel_check_word (name, eax, &has_level_2,
+ &no_level_2_or_3, cpu_features);
if (result != 0)
return result;
- result = intel_check_word (name, ebx, &has_level_2, &no_level_2_or_3);
+ result = intel_check_word (name, ebx, &has_level_2,
+ &no_level_2_or_3, cpu_features);
if (result != 0)
return result;
- result = intel_check_word (name, ecx, &has_level_2, &no_level_2_or_3);
+ result = intel_check_word (name, ecx, &has_level_2,
+ &no_level_2_or_3, cpu_features);
if (result != 0)
return result;
- result = intel_check_word (name, edx, &has_level_2, &no_level_2_or_3);
+ result = intel_check_word (name, edx, &has_level_2,
+ &no_level_2_or_3, cpu_features);
if (result != 0)
return result;
}
@@ -437,7 +444,7 @@ __cache_sysconf (int name)
const struct cpu_features *cpu_features = __get_cpu_features ();
if (cpu_features->kind == arch_kind_intel)
- return handle_intel (name, cpu_features->max_cpuid);
+ return handle_intel (name, cpu_features);
if (cpu_features->kind == arch_kind_amd)
return handle_amd (name);
@@ -494,14 +501,14 @@ init_cacheinfo (void)
if (cpu_features->kind == arch_kind_intel)
{
- data = handle_intel (_SC_LEVEL1_DCACHE_SIZE, max_cpuid);
+ data = handle_intel (_SC_LEVEL1_DCACHE_SIZE, cpu_features);
- long int core = handle_intel (_SC_LEVEL2_CACHE_SIZE, max_cpuid);
+ long int core = handle_intel (_SC_LEVEL2_CACHE_SIZE, cpu_features);
bool inclusive_cache = true;
/* Try L3 first. */
level = 3;
- shared = handle_intel (_SC_LEVEL3_CACHE_SIZE, max_cpuid);
+ shared = handle_intel (_SC_LEVEL3_CACHE_SIZE, cpu_features);
/* Number of logical processors sharing L2 cache. */
int threads_l2;
@@ -531,8 +538,8 @@ init_cacheinfo (void)
highest cache level. */
if (max_cpuid >= 4)
{
- unsigned int family = GLRO(dl_x86_cpu_features).family;
- unsigned int model = GLRO(dl_x86_cpu_features).model;
+ unsigned int family = cpu_features->family;
+ unsigned int model = cpu_features->model;
int i = 0;
@@ -675,7 +682,7 @@ intel_bug_no_cache_info:
level. */
threads
- = ((GLRO(dl_x86_cpu_features).cpuid[COMMON_CPUID_INDEX_1].ebx
+ = ((cpu_features->cpuid[COMMON_CPUID_INDEX_1].ebx
>> 16) & 0xff);
}