linux-kernel - [PATCH 2.6.32] x86: enable lapic nmi watchdog on AMD Family 11h

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Date:	Thu, 3 Dec 2009 15:52:44 +0100
From:	Mikael Pettersson <mikpe@...uu.se>
To:	x86@...nel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.32] x86: enable lapic nmi watchdog on AMD Family 11h

The x86 lapic nmi watchdog does not recognize AMD Family 11h,
resulting in:

NMI watchdog: CPU not supported

As far as I can see from available documentation (the BKDM),
family 11h looks identical to family 10h as far as the PMU
is concerned.

Extending the check to accept family 11h results in:

Testing NMI watchdog ... OK.

I've been running with this change on a Turion X2 Ultra ZM-82
laptop for a couple of weeks now without problems.

Signed-off-by: Mikael Pettersson <mikpe@...uu.se>
---

diff -rupN linux-2.6.32/arch/x86/kernel/cpu/perfctr-watchdog.c linux-2.6.32.x86-amd-fam11-nmi/arch/x86/kernel/cpu/perfctr-watchdog.c
--- linux-2.6.32/arch/x86/kernel/cpu/perfctr-watchdog.c	2009-12-03 12:38:32.000000000 +0100
+++ linux-2.6.32.x86-amd-fam11-nmi/arch/x86/kernel/cpu/perfctr-watchdog.c	2009-12-03 12:47:59.000000000 +0100
@@ -712,7 +712,7 @@ 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 != 16 && boot_cpu_data.x86 != 17)
 			return;
 		wd_ops = &k7_wd_ops;
 		break;
--
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