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[PATCH] x86_64: 386/x86-64 Further AMD dual core fixes
- Remove duplicated ifdef - Make core_id match what Intel uses - Initialize phys_proc_id correctly for non DC case - Handle non power of two core numbers. Fixes for both i386 and 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>
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@ -195,7 +195,7 @@ static void __init init_amd(struct cpuinfo_x86 *c)
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c->x86_num_cores = 1;
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c->x86_num_cores = 1;
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}
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}
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#ifdef CONFIG_X86_SMP
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#ifdef CONFIG_X86_HT
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/*
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/*
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* On a AMD dual core setup the lower bits of the APIC id
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* On a AMD dual core setup the lower bits of the APIC id
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* distingush the cores. Assumes number of cores is a power
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* distingush the cores. Assumes number of cores is a power
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@ -203,8 +203,11 @@ static void __init init_amd(struct cpuinfo_x86 *c)
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*/
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*/
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if (c->x86_num_cores > 1) {
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if (c->x86_num_cores > 1) {
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int cpu = smp_processor_id();
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int cpu = smp_processor_id();
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/* Fix up the APIC ID following AMD specifications. */
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unsigned bits = 0;
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cpu_core_id[cpu] >>= hweight32(c->x86_num_cores - 1);
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while ((1 << bits) < c->x86_num_cores)
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bits++;
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cpu_core_id[cpu] = phys_proc_id[cpu] & ((1<<bits)-1);
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phys_proc_id[cpu] >>= bits;
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printk(KERN_INFO "CPU %d(%d) -> Core %d\n",
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printk(KERN_INFO "CPU %d(%d) -> Core %d\n",
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cpu, c->x86_num_cores, cpu_core_id[cpu]);
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cpu, c->x86_num_cores, cpu_core_id[cpu]);
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}
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}
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@ -244,11 +244,8 @@ static void __init early_cpu_detect(void)
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early_intel_workaround(c);
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early_intel_workaround(c);
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#ifdef CONFIG_SMP
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#ifdef CONFIG_X86_HT
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#ifdef CONFIG_X86_HT
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phys_proc_id[smp_processor_id()] =
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phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
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#endif
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cpu_core_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
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#endif
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#endif
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}
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}
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@ -719,7 +719,6 @@ static void __init display_cacheinfo(struct cpuinfo_x86 *c)
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}
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}
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}
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}
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#ifdef CONFIG_SMP
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/*
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/*
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* On a AMD dual core setup the lower bits of the APIC id distingush the cores.
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* On a AMD dual core setup the lower bits of the APIC id distingush the cores.
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* Assumes number of cores is a power of two.
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* Assumes number of cores is a power of two.
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@ -729,16 +728,24 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
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#ifdef CONFIG_SMP
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#ifdef CONFIG_SMP
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int cpu = smp_processor_id();
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int cpu = smp_processor_id();
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int node = 0;
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int node = 0;
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unsigned bits;
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if (c->x86_num_cores == 1)
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if (c->x86_num_cores == 1)
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return;
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return;
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/* Fix up the APIC ID following the AMD specification. */
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cpu_core_id[cpu] >>= hweight32(c->x86_num_cores - 1);
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bits = 0;
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while ((1 << bits) < c->x86_num_cores)
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bits++;
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/* Low order bits define the core id (index of core in socket) */
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cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
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/* Convert the APIC ID into the socket ID */
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phys_proc_id[cpu] >>= bits;
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#ifdef CONFIG_NUMA
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#ifdef CONFIG_NUMA
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/* When an ACPI SRAT table is available use the mappings from SRAT
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/* When an ACPI SRAT table is available use the mappings from SRAT
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instead. */
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instead. */
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if (acpi_numa <= 0) {
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if (acpi_numa <= 0) {
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node = cpu_core_id[cpu];
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node = phys_proc_id[cpu];
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if (!node_online(node))
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if (!node_online(node))
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node = first_node(node_online_map);
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node = first_node(node_online_map);
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cpu_to_node[cpu] = node;
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cpu_to_node[cpu] = node;
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@ -746,18 +753,11 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
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node = cpu_to_node[cpu];
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node = cpu_to_node[cpu];
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}
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}
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#endif
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#endif
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/* For now: - better than BAD_APIC_ID at least*/
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phys_proc_id[cpu] = cpu_core_id[cpu];
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printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
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printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
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cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
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cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
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#endif
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#endif
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}
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}
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#else
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static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
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{
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}
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#endif
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static int __init init_amd(struct cpuinfo_x86 *c)
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static int __init init_amd(struct cpuinfo_x86 *c)
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{
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{
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@ -963,8 +963,7 @@ void __init early_identify_cpu(struct cpuinfo_x86 *c)
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}
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}
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#ifdef CONFIG_SMP
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#ifdef CONFIG_SMP
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phys_proc_id[smp_processor_id()] =
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phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
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cpu_core_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
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#endif
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#endif
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}
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}
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