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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-22 01:32:50 -0700
committerIngo Molnar <mingo@elte.hu>2008-08-22 10:43:21 +0200
commitb05f78f5c713eda2c34e495d92495ee4f1c3b5e1 (patch)
tree87dd57341abc375131d3268d33c504e3eb609462 /arch/x86/kernel/cpu/common_64.c
parentc9c3dddd8f9a05b25d4ce53e8e80cc0ea1759d18 (diff)
x86_64: printout msr -v2
commandline show_msr=1 for bsp, show_msr=32 for all 32 cpus. [ mingo@elte.hu: added documentation ] Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/common_64.c')
-rw-r--r--arch/x86/kernel/cpu/common_64.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common_64.c b/arch/x86/kernel/cpu/common_64.c
index dd6e3f15017..bca2d6980e8 100644
--- a/arch/x86/kernel/cpu/common_64.c
+++ b/arch/x86/kernel/cpu/common_64.c
@@ -394,6 +394,49 @@ static __init int setup_noclflush(char *arg)
}
__setup("noclflush", setup_noclflush);
+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);
+
void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
{
if (c->x86_model_id[0])
@@ -403,6 +446,14 @@ 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)