x86: store core id bits in cpuinfo_x8

We need to store core id bits to cpuinfo_x86 in early_identify_cpu. So we
use it to create acpiid_to_node array in k8topolgy.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 62db062ba138623e13663c9b63180cbe6dbb27ca..84f66b7b4d2e3defe2604ce2a3a03a1b73aa95ea 100644 (file)
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -542,18 +542,7 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
        int node = 0;
        unsigned apicid = hard_smp_processor_id();
 #endif
-       unsigned ecx = cpuid_ecx(0x80000008);
-
-       c->x86_max_cores = (ecx & 0xff) + 1;
-
-       /* CPU telling us the core id bits shift? */
-       bits = (ecx >> 12) & 0xF;
-
-       /* Otherwise recompute */
-       if (bits == 0) {
-               while ((1 << bits) < c->x86_max_cores)
-                       bits++;
-       }
+       bits = c->x86_coreid_bits;
 
        /* Low order bits define the core id (index of core in socket) */
        c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
@@ -591,6 +580,33 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 #endif
 }
 
+static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
+{
+#ifdef CONFIG_SMP
+       unsigned bits, ecx;
+
+       /* Multi core CPU? */
+       if (c->extended_cpuid_level < 0x80000008)
+               return;
+
+       ecx = cpuid_ecx(0x80000008);
+
+       c->x86_max_cores = (ecx & 0xff) + 1;
+
+       /* CPU telling us the core id bits shift? */
+       bits = (ecx >> 12) & 0xF;
+
+       /* Otherwise recompute */
+       if (bits == 0) {
+               while ((1 << bits) < c->x86_max_cores)
+                       bits++;
+       }
+
+       c->x86_coreid_bits = bits;
+
+#endif
+}
+
 #define ENABLE_C1E_MASK                0x18000000
 #define CPUID_PROCESSOR_SIGNATURE      1
 #define CPUID_XFAM             0x0ff00000
@@ -858,7 +874,7 @@ struct cpu_model_info {
    below. */
 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 {
-       u32 tfms;
+       u32 tfms, xlvl;
 
        c->loops_per_jiffy = loops_per_jiffy;
        c->x86_cache_size = -1;
@@ -869,6 +885,7 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
        c->x86_clflush_size = 64;
        c->x86_cache_alignment = c->x86_clflush_size;
        c->x86_max_cores = 1;
+       c->x86_coreid_bits = 0;
        c->extended_cpuid_level = 0;
        memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
@@ -905,18 +922,6 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 #ifdef CONFIG_SMP
        c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
 #endif
-}
-
-/*
- * This does the hard work of actually picking apart the CPU stuff...
- */
-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
-{
-       int i;
-       u32 xlvl;
-
-       early_identify_cpu(c);
-
        /* AMD-defined flags: level 0x80000001 */
        xlvl = cpuid_eax(0x80000000);
        c->extended_cpuid_level = xlvl;
@@ -937,6 +942,23 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
                        c->x86_capability[2] = cpuid_edx(0x80860001);
        }
 
+       switch (c->x86_vendor) {
+       case X86_VENDOR_AMD:
+               early_init_amd(c);
+               break;
+       }
+
+}
+
+/*
+ * This does the hard work of actually picking apart the CPU stuff...
+ */
+void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+{
+       int i;
+
+       early_identify_cpu(c);
+
        init_scattered_cpuid_features(c);
 
        c->apicid = phys_pkg_id(0);

diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 6c0d96a7af637d5dce96287c186e783564b1a3e4..2ae8ceb8a74ed6ec3ee8ce9eedce2ee4c111e32d 100644 (file)
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -61,6 +61,7 @@ struct cpuinfo_x86 {
        int     x86_tlbsize;    /* number of 4K pages in DTLB/ITLB combined(in pages)*/
         __u8    x86_virt_bits, x86_phys_bits;
        __u8    x86_max_cores;  /* cpuid returned max cores value */
+       __u8    x86_coreid_bits; /* cpuid returned core id bits */
         __u32   x86_power;     
        __u32   extended_cpuid_level;   /* Max extended CPUID function supported */
        unsigned long loops_per_jiffy;