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authorAndi Kleen <ak@suse.de>2007-05-02 19:27:12 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:12 +0200
commitde90c5ce832b1218042316260ff9268b00fdcba3 (patch)
tree604d161cfb3eb01b8d3ea1c22087c1c476f24091
parentd479d2cc0802d5c8546a6a7492646e08228effd5 (diff)
downloadlinux-de90c5ce832b1218042316260ff9268b00fdcba3.tar.bz2
[PATCH] i386: Enable bank 0 on non K7 Athlon
As a bug workaround bank 0 on K7s is normally disabled, but no need to do that on other AMD CPUs. Cc: davej@redhat.com Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/i386/kernel/cpu/mcheck/k7.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/i386/kernel/cpu/mcheck/k7.c b/arch/i386/kernel/cpu/mcheck/k7.c
index b0862af595aa..7a2472557bbb 100644
--- a/arch/i386/kernel/cpu/mcheck/k7.c
+++ b/arch/i386/kernel/cpu/mcheck/k7.c
@@ -82,9 +82,13 @@ void amd_mcheck_init(struct cpuinfo_x86 *c)
nr_mce_banks = l & 0xff;
/* Clear status for MC index 0 separately, we don't touch CTL,
- * as some Athlons cause spurious MCEs when its enabled. */
- wrmsr (MSR_IA32_MC0_STATUS, 0x0, 0x0);
- for (i=1; i<nr_mce_banks; i++) {
+ * as some K7 Athlons cause spurious MCEs when its enabled. */
+ if (boot_cpu_data.x86 == 6) {
+ wrmsr (MSR_IA32_MC0_STATUS, 0x0, 0x0);
+ i = 1;
+ } else
+ i = 0;
+ for (; i<nr_mce_banks; i++) {
wrmsr (MSR_IA32_MC0_CTL+4*i, 0xffffffff, 0xffffffff);
wrmsr (MSR_IA32_MC0_STATUS+4*i, 0x0, 0x0);
}