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From: Fabien Thomas <fabient@FreeBSD.org>
Date: Tue, 3 Jan 2012 17:17:31 +0000 (UTC)
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Subject: svn commit: r229398 - stable/8/sys/dev/hwpmc
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Author: fabient
Date: Tue Jan  3 17:17:30 2012
New Revision: 229398
URL: http://svn.freebsd.org/changeset/base/229398

Log:
  MFC r228438:
  There's a small set of events on Nehalem, that are not supported in
  processors with CPUID signature 06_1AH, 06_1EH, and 06_1FH.

Modified:
  stable/8/sys/dev/hwpmc/hwpmc_core.c
Directory Properties:
  stable/8/sys/   (props changed)

Modified: stable/8/sys/dev/hwpmc/hwpmc_core.c
==============================================================================
--- stable/8/sys/dev/hwpmc/hwpmc_core.c	Tue Jan  3 17:15:27 2012	(r229397)
+++ stable/8/sys/dev/hwpmc/hwpmc_core.c	Tue Jan  3 17:17:30 2012	(r229398)
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <machine/apicvar.h>
 #include <machine/cpu.h>
 #include <machine/cpufunc.h>
+#include <machine/md_var.h>
 #include <machine/specialreg.h>
 
 #define	CORE_CPUID_REQUEST		0xA
@@ -1553,7 +1554,7 @@ static int
 iap_allocate_pmc(int cpu, int ri, struct pmc *pm,
     const struct pmc_op_pmcallocate *a)
 {
-	int n;
+	int n, model;
 	enum pmc_event ev;
 	struct iap_event_descr *ie;
 	uint32_t c, caps, config, cpuflag, evsel, mask;
@@ -1573,6 +1574,16 @@ iap_allocate_pmc(int cpu, int ri, struct
 	if (iap_architectural_event_is_unsupported(ev))
 		return (EOPNOTSUPP);
 
+	/*
+	 * A small number of events are not supported in all the
+	 * processors based on a given microarchitecture.
+	 */
+	if (ev == PMC_EV_IAP_EVENT_0FH_01H || ev == PMC_EV_IAP_EVENT_0FH_80H) { 
+		model = ((cpu_id & 0xF0000) >> 12) | ((cpu_id & 0xF0) >> 4);
+		if (core_cputype == PMC_CPU_INTEL_COREI7 && model != 0x2E)  
+			return (EINVAL); 	
+	}
+	
 	switch (core_cputype) {
 	case PMC_CPU_INTEL_COREI7:
 		if (iap_event_corei7_ok_on_counter(ev, ri) == 0)