Commit 4d2be126 authored Jun 11, 2009 by Jaswinder Singh Rajput Committed by Ingo Molnar Jun 13, 2009

perf_counter, x86: Check old-AMD performance monitoring support



AMD supports performance monitoring start from K7 (i.e. family 6),
so disable it for earlier AMD CPUs.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1244714289.6923.0.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent d5e8da64

arch/x86/kernel/cpu/perf_counter.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1459,6 +1459,10 @@ static int intel_pmu_init(void)

		static int amd_pmu_init(void)
		{
		/* Performance-monitoring supported from K7 and later: */
		if (boot_cpu_data.x86 < 6)
		return -ENODEV;

		x86_pmu = amd_pmu;

		switch (boot_cpu_data.x86) {