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Commit 7991c9ca authored by Vince Weaver's avatar Vince Weaver Committed by Ingo Molnar
Browse files

perf/x86: Fix P6 FP_ASSIST event constraint 



According to Intel SDM Volume 3B, FP_ASSIST is limited to Counter 1 only,
not Counter 0.

Tested on a Pentium II.

Signed-off-by: default avatarVince Weaver <vincent.weaver@maine.edu>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1210191728570.14552@vincent-weaver-1.um.maine.edu


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent c13d38e4

arch/x86/kernel/cpu/perf_event_p6.c

+1 −1
Original line number Diff line number Diff line
@@ -34,7 +34,7 @@ static struct event_constraint p6_event_constraints[] = 
{

	INTEL_EVENT_CONSTRAINT(0xc1, 0x1),	/* FLOPS */

	INTEL_EVENT_CONSTRAINT(0x10, 0x1),	/* FP_COMP_OPS_EXE */

	INTEL_EVENT_CONSTRAINT(0x11, 0x1),	/* FP_ASSIST */

	INTEL_EVENT_CONSTRAINT(0x11, 0x2),	/* FP_ASSIST */

	INTEL_EVENT_CONSTRAINT(0x12, 0x2),	/* MUL */

	INTEL_EVENT_CONSTRAINT(0x13, 0x2),	/* DIV */

	INTEL_EVENT_CONSTRAINT(0x14, 0x1),	/* CYCLES_DIV_BUSY */