x86, nmi: Support NMI watchdog on newer AMD CPU families

CPU families 0x12, 0x14 and 0x15 support this functionality.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20100930123357.GC20545@loge.amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index fb329e9..d9f4ff8 100644 (file)
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -700,11 +700,10 @@ static void probe_nmi_watchdog(void)
 {
        switch (boot_cpu_data.x86_vendor) {
        case X86_VENDOR_AMD:
-               if (boot_cpu_data.x86 != 6 && boot_cpu_data.x86 != 15 &&
-                   boot_cpu_data.x86 != 16 && boot_cpu_data.x86 != 17)
-                       return;
-               wd_ops = &k7_wd_ops;
-               break;
+               if (boot_cpu_data.x86 == 6 ||
+                   (boot_cpu_data.x86 >= 0xf && boot_cpu_data.x86 <= 0x15))
+                       wd_ops = &k7_wd_ops;
+               return;
        case X86_VENDOR_INTEL:
                /* Work around where perfctr1 doesn't have a working enable
                 * bit as described in the following errata: