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: Vince Weaver <vincent.wea...@maine.edu>
diff -ur linux-3.7-rc1.orig/arch/x86/kernel/cpu/perf_event_p6.c
linux-3.7-rc1/arch/x86/kernel/cpu/perf_event_p6.c
--- linux-3.7-rc1.orig/arch/x86/kernel/cpu/perf_event_p6.c 2012-10-14
17:41:04.000000000 -0400
+++ linux-3.7-rc1/arch/x86/kernel/cpu/perf_event_p6.c 2012-10-19
14:50:41.212241569 -0400
@@ -34,7 +34,7 @@
{
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 */
--
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