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| author |   Andi Kleen <ak@suse.de> | 2005-04-16 15:25:15 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:25:15 -0700 |
| commit | 3dd9d514846cdca1dcef2e4fce666d85e199e844 (patch) | |
| tree | 28e60a8b733db213e88b0aee8ef3861a93a6fa48 /arch/i386/kernel/cpu/amd.c | |
| parent | [PATCH] x86_64: Remove duplicated syscall entry. (diff) | |
| download | linux-dev-3dd9d514846cdca1dcef2e4fce666d85e199e844.tar.xz linux-dev-3dd9d514846cdca1dcef2e4fce666d85e199e844.zip | |
[PATCH] x86_64: add support for Intel dual-core detection and displaying
Appended patch adds the support for Intel dual-core detection and displaying
the core related information in /proc/cpuinfo.
It adds two new fields "core id" and "cpu cores" to x86 /proc/cpuinfo and the
"core id" field for x86_64("cpu cores" field is already present in x86_64).
Number of processor cores in a die is detected using cpuid(4) and this is
documented in IA-32 Intel Architecture Software Developer's Manual (vol 2a)
(http://developer.intel.com/design/pentium4/manuals/index_new.htm#sdm_vol2a)
This patch also adds cpu_core_map similar to cpu_sibling_map.
Slightly hacked by AK.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/amd.c')
| -rw-r--r-- | arch/i386/kernel/cpu/amd.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c index ae94585d0445..fa10d0a509c7 100644 --- a/arch/i386/kernel/cpu/amd.c +++ b/arch/i386/kernel/cpu/amd.c @@ -188,6 +188,13 @@ static void __init init_amd(struct cpuinfo_x86 *c) } display_cacheinfo(c); + + if (cpuid_eax(0x80000000) >= 0x80000008) { + c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; + if (c->x86_num_cores & (c->x86_num_cores - 1)) + c->x86_num_cores = 1; + } + detect_ht(c); #ifdef CONFIG_X86_HT @@ -199,12 +206,6 @@ static void __init init_amd(struct cpuinfo_x86 *c) if (cpu_has(c, X86_FEATURE_CMP_LEGACY)) smp_num_siblings = 1; #endif - - if (cpuid_eax(0x80000000) >= 0x80000008) { - c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; - if (c->x86_num_cores & (c->x86_num_cores - 1)) - c->x86_num_cores = 1; - } } static unsigned int amd_size_cache(struct cpuinfo_x86 * c, unsigned int size) |