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authorAndi Kleen <ak@suse.de>2005-05-16 21:53:21 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-17 07:59:13 -0700
commita158608bf4c6260caf26089b00a000851e11357a (patch)
treebccf6f173d6ddcb24aff243573086475b25dfe93 /arch/x86_64
parent637716a3825e186555361574aa1fa3c0ebf8018b (diff)
downloadop-kernel-dev-a158608bf4c6260caf26089b00a000851e11357a.zip
op-kernel-dev-a158608bf4c6260caf26089b00a000851e11357a.tar.gz
[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.c11
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
}
/*
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