x86: make 32bit support show_msr like 64 bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ee1044c..a79cf5c 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -616,6 +616,49 @@ void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
        mtrr_ap_init();
 }
 
+struct msr_range {
+       unsigned min;
+       unsigned max;
+};
+
+static struct msr_range msr_range_array[] __cpuinitdata = {
+       { 0x00000000, 0x00000418},
+       { 0xc0000000, 0xc000040b},
+       { 0xc0010000, 0xc0010142},
+       { 0xc0011000, 0xc001103b},
+};
+
+static void __cpuinit print_cpu_msr(void)
+{
+       unsigned index;
+       u64 val;
+       int i;
+       unsigned index_min, index_max;
+
+       for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) {
+               index_min = msr_range_array[i].min;
+               index_max = msr_range_array[i].max;
+               for (index = index_min; index < index_max; index++) {
+                       if (rdmsrl_amd_safe(index, &val))
+                               continue;
+                       printk(KERN_INFO " MSR%08x: %016llx\n", index, val);
+               }
+       }
+}
+
+static int show_msr __cpuinitdata;
+static __init int setup_show_msr(char *arg)
+{
+       int num;
+
+       get_option(&arg, &num);
+
+       if (num > 0)
+               show_msr = num;
+       return 1;
+}
+__setup("show_msr=", setup_show_msr);
+
 static __init int setup_noclflush(char *arg)
 {
        setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
@@ -644,6 +687,14 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
                printk(KERN_CONT " stepping %02x\n", c->x86_mask);
        else
                printk(KERN_CONT "\n");
+
+#ifdef CONFIG_SMP
+       if (c->cpu_index < show_msr)
+               print_cpu_msr();
+#else
+       if (show_msr)
+               print_cpu_msr();
+#endif
 }
 
 static __init int setup_disablecpuid(char *arg)