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| author | Andi Kleen <ak@suse.de> | 2005-05-16 21:53:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-17 07:59:13 -0700 |
| commit | a158608bf4c6260caf26089b00a000851e11357a (patch) | |
| tree | bccf6f173d6ddcb24aff243573086475b25dfe93 /arch/x86_64 | |
| parent | 637716a3825e186555361574aa1fa3c0ebf8018b (diff) | |
| download | kernel_samsung_smdk4412-a158608bf4c6260caf26089b00a000851e11357a.zip kernel_samsung_smdk4412-a158608bf4c6260caf26089b00a000851e11357a.tar.gz kernel_samsung_smdk4412-a158608bf4c6260caf26089b00a000851e11357a.tar.bz2 | |
[PATCH] x86_64/i386: fix defaults for physical/core id in /proc/cpuinfo
Last round hopefully of cpu_core_id changes hopefully fow now:
- Always initialize cpu_core_id for all CPUs, even when no dual core setup
is detected. This prevents funny /proc/cpuinfo output
- Do the same with phys_proc_id[] even when no HyperThreading - dito.
- Use the CPU APIC-ID from CPUID 1 instead of the linux virtual CPU number
to identify the core for AMD dual core setups.
Patch for i386/x86-64.
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/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 2129cf9..aab249a 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -731,7 +731,8 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c) int node = 0; if (c->x86_num_cores == 1) return; - cpu_core_id[cpu] = cpu >> hweight32(c->x86_num_cores - 1); + /* Fix up the APIC ID following the AMD specification. */ + cpu_core_id[cpu] >>= hweight32(c->x86_num_cores - 1); #ifdef CONFIG_NUMA /* When an ACPI SRAT table is available use the mappings from SRAT @@ -745,6 +746,9 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c) node = cpu_to_node[cpu]; } #endif + /* For now: - better than BAD_APIC_ID at least*/ + phys_proc_id[cpu] = cpu_core_id[cpu]; + printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n", cpu, c->x86_num_cores, node, cpu_core_id[cpu]); #endif @@ -959,6 +963,11 @@ void __init early_identify_cpu(struct cpuinfo_x86 *c) /* Have CPUID level 0 only - unheard of */ c->x86 = 4; } + +#ifdef CONFIG_SMP + phys_proc_id[smp_processor_id()] = + cpu_core_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff; +#endif } /* |