diff --git a/lib/libpmc/libpmc.c b/lib/libpmc/libpmc.c
index 2b7b61b2d6b0..5282bb29f897 100644
--- a/lib/libpmc/libpmc.c
+++ b/lib/libpmc/libpmc.c
@@ -190,6 +190,11 @@ static const struct pmc_event_descr corei7_event_table[] =
 	__PMC_EV_ALIAS_COREI7()
 };
 
+static const struct pmc_event_descr nehalem_ex_event_table[] =
+{
+	__PMC_EV_ALIAS_COREI7()
+};
+
 static const struct pmc_event_descr haswell_event_table[] =
 {
 	__PMC_EV_ALIAS_HASWELL()
@@ -220,6 +225,11 @@ static const struct pmc_event_descr westmere_event_table[] =
 	__PMC_EV_ALIAS_WESTMERE()
 };
 
+static const struct pmc_event_descr westmere_ex_event_table[] =
+{
+	__PMC_EV_ALIAS_WESTMERE()
+};
+
 static const struct pmc_event_descr corei7uc_event_table[] =
 {
 	__PMC_EV_ALIAS_COREI7UC()
@@ -255,12 +265,14 @@ PMC_MDEP_TABLE(atom_silvermont, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TS
 PMC_MDEP_TABLE(core, IAP, PMC_CLASS_SOFT, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(core2, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(corei7, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC, PMC_CLASS_UCF, PMC_CLASS_UCP);
+PMC_MDEP_TABLE(nehalem_ex, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(haswell, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC, PMC_CLASS_UCF, PMC_CLASS_UCP);
 PMC_MDEP_TABLE(ivybridge, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(ivybridge_xeon, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(sandybridge, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC, PMC_CLASS_UCF, PMC_CLASS_UCP);
 PMC_MDEP_TABLE(sandybridge_xeon, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(westmere, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC, PMC_CLASS_UCF, PMC_CLASS_UCP);
+PMC_MDEP_TABLE(westmere_ex, IAP, PMC_CLASS_SOFT, PMC_CLASS_IAF, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(k7, K7, PMC_CLASS_SOFT, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(k8, K8, PMC_CLASS_SOFT, PMC_CLASS_TSC);
 PMC_MDEP_TABLE(p4, P4, PMC_CLASS_SOFT, PMC_CLASS_TSC);
@@ -298,12 +310,14 @@ PMC_CLASS_TABLE_DESC(atom_silvermont, IAP, atom_silvermont, iap);
 PMC_CLASS_TABLE_DESC(core, IAP, core, iap);
 PMC_CLASS_TABLE_DESC(core2, IAP, core2, iap);
 PMC_CLASS_TABLE_DESC(corei7, IAP, corei7, iap);
+PMC_CLASS_TABLE_DESC(nehalem_ex, IAP, nehalem_ex, iap);
 PMC_CLASS_TABLE_DESC(haswell, IAP, haswell, iap);
 PMC_CLASS_TABLE_DESC(ivybridge, IAP, ivybridge, iap);
 PMC_CLASS_TABLE_DESC(ivybridge_xeon, IAP, ivybridge_xeon, iap);
 PMC_CLASS_TABLE_DESC(sandybridge, IAP, sandybridge, iap);
 PMC_CLASS_TABLE_DESC(sandybridge_xeon, IAP, sandybridge_xeon, iap);
 PMC_CLASS_TABLE_DESC(westmere, IAP, westmere, iap);
+PMC_CLASS_TABLE_DESC(westmere_ex, IAP, westmere_ex, iap);
 PMC_CLASS_TABLE_DESC(ucf, UCF, ucf, ucf);
 PMC_CLASS_TABLE_DESC(corei7uc, UCP, corei7uc, ucp);
 PMC_CLASS_TABLE_DESC(haswelluc, UCP, haswelluc, ucp);
@@ -608,6 +622,8 @@ static struct pmc_event_alias core2_aliases_without_iaf[] = {
 #define	atom_silvermont_aliases_without_iaf	core2_aliases_without_iaf
 #define corei7_aliases			core2_aliases
 #define corei7_aliases_without_iaf	core2_aliases_without_iaf
+#define nehalem_ex_aliases		core2_aliases
+#define nehalem_ex_aliases_without_iaf	core2_aliases_without_iaf
 #define haswell_aliases			core2_aliases
 #define haswell_aliases_without_iaf	core2_aliases_without_iaf
 #define ivybridge_aliases		core2_aliases
@@ -620,6 +636,8 @@ static struct pmc_event_alias core2_aliases_without_iaf[] = {
 #define sandybridge_xeon_aliases_without_iaf	core2_aliases_without_iaf
 #define westmere_aliases		core2_aliases
 #define westmere_aliases_without_iaf	core2_aliases_without_iaf
+#define westmere_ex_aliases		core2_aliases
+#define westmere_ex_aliases_without_iaf	core2_aliases_without_iaf
 
 #define	IAF_KW_OS		"os"
 #define	IAF_KW_USR		"usr"
@@ -863,7 +881,9 @@ iap_allocate_pmc(enum pmc_event pe, char *ctrspec,
 			} else
 				return (-1);
 		} else if (cpu_info.pm_cputype == PMC_CPU_INTEL_COREI7 ||
-		    cpu_info.pm_cputype == PMC_CPU_INTEL_WESTMERE) {
+		    cpu_info.pm_cputype == PMC_CPU_INTEL_WESTMERE ||
+		    cpu_info.pm_cputype == PMC_CPU_INTEL_NEHALEM_EX ||
+		    cpu_info.pm_cputype == PMC_CPU_INTEL_WESTMERE_EX) {
 			if (KWPREFIXMATCH(p, IAP_KW_RSP "=")) {
 				n = pmc_parse_mask(iap_rsp_mask_i7_wm, p, &rsp);
 			} else
@@ -2760,6 +2780,10 @@ pmc_event_names_of_class(enum pmc_class cl, const char ***eventnames,
 			ev = corei7_event_table;
 			count = PMC_EVENT_TABLE_SIZE(corei7);
 			break;
+		case PMC_CPU_INTEL_NEHALEM_EX:
+			ev = nehalem_ex_event_table;
+			count = PMC_EVENT_TABLE_SIZE(nehalem_ex);
+			break;
 		case PMC_CPU_INTEL_HASWELL:
 			ev = haswell_event_table;
 			count = PMC_EVENT_TABLE_SIZE(haswell);
@@ -2784,6 +2808,10 @@ pmc_event_names_of_class(enum pmc_class cl, const char ***eventnames,
 			ev = westmere_event_table;
 			count = PMC_EVENT_TABLE_SIZE(westmere);
 			break;
+		case PMC_CPU_INTEL_WESTMERE_EX:
+			ev = westmere_ex_event_table;
+			count = PMC_EVENT_TABLE_SIZE(westmere_ex);
+			break;
 		}
 		break;
 	case PMC_CLASS_UCF:
@@ -3079,6 +3107,9 @@ pmc_init(void)
 		pmc_class_table[n++] = &corei7uc_class_table_descr;
 		PMC_MDEP_INIT_INTEL_V2(corei7);
 		break;
+	case PMC_CPU_INTEL_NEHALEM_EX:
+		PMC_MDEP_INIT_INTEL_V2(nehalem_ex);
+		break;
 	case PMC_CPU_INTEL_HASWELL:
 		pmc_class_table[n++] = &ucf_class_table_descr;
 		pmc_class_table[n++] = &haswelluc_class_table_descr;
@@ -3103,6 +3134,9 @@ pmc_init(void)
 		pmc_class_table[n++] = &westmereuc_class_table_descr;
 		PMC_MDEP_INIT_INTEL_V2(westmere);
 		break;
+	case PMC_CPU_INTEL_WESTMERE_EX:
+		PMC_MDEP_INIT_INTEL_V2(westmere_ex);
+		break;
 	case PMC_CPU_INTEL_PIV:
 		PMC_MDEP_INIT(p4);
 		pmc_class_table[n] = &p4_class_table_descr;
@@ -3237,6 +3271,11 @@ _pmc_name_of_event(enum pmc_event pe, enum pmc_cputype cpu)
 			ev = corei7_event_table;
 			evfence = corei7_event_table + PMC_EVENT_TABLE_SIZE(corei7);
 			break;
+		case PMC_CPU_INTEL_NEHALEM_EX:
+			ev = nehalem_ex_event_table;
+			evfence = nehalem_ex_event_table +
+			    PMC_EVENT_TABLE_SIZE(nehalem_ex);
+			break;
 		case PMC_CPU_INTEL_HASWELL:
 			ev = haswell_event_table;
 			evfence = haswell_event_table + PMC_EVENT_TABLE_SIZE(haswell);
@@ -3261,6 +3300,11 @@ _pmc_name_of_event(enum pmc_event pe, enum pmc_cputype cpu)
 			ev = westmere_event_table;
 			evfence = westmere_event_table + PMC_EVENT_TABLE_SIZE(westmere);
 			break;
+		case PMC_CPU_INTEL_WESTMERE_EX:
+			ev = westmere_ex_event_table;
+			evfence = westmere_ex_event_table +
+			    PMC_EVENT_TABLE_SIZE(westmere_ex);
+			break;
 		default:	/* Unknown CPU type. */
 			break;
 		}
diff --git a/sys/dev/hwpmc/hwpmc_core.c b/sys/dev/hwpmc/hwpmc_core.c
index 2bebee2786e7..792f3037192a 100644
--- a/sys/dev/hwpmc/hwpmc_core.c
+++ b/sys/dev/hwpmc/hwpmc_core.c
@@ -2021,6 +2021,7 @@ iap_allocate_pmc(int cpu, int ri, struct pmc *pm,
 
 	switch (core_cputype) {
 	case PMC_CPU_INTEL_COREI7:
+	case PMC_CPU_INTEL_NEHALEM_EX:
 		if (iap_event_corei7_ok_on_counter(ev, ri) == 0)
 			return (EINVAL);
 		break;
@@ -2033,6 +2034,7 @@ iap_allocate_pmc(int cpu, int ri, struct pmc *pm,
 			return (EINVAL);
 		break;
 	case PMC_CPU_INTEL_WESTMERE:
+	case PMC_CPU_INTEL_WESTMERE_EX:
 		if (iap_event_westmere_ok_on_counter(ev, ri) == 0)
 			return (EINVAL);
 		break;
@@ -2186,7 +2188,9 @@ iap_allocate_pmc(int cpu, int ri, struct pmc *pm,
 		    ev == PMC_EV_IAP_EVENT_BBH_01H)
 			return (EINVAL);
 		if ((core_cputype == PMC_CPU_INTEL_COREI7 ||
-		    core_cputype == PMC_CPU_INTEL_WESTMERE) &&
+		    core_cputype == PMC_CPU_INTEL_WESTMERE ||
+		    core_cputype == PMC_CPU_INTEL_NEHALEM_EX ||
+		    core_cputype == PMC_CPU_INTEL_WESTMERE_EX) &&
 		    a->pm_md.pm_iap.pm_iap_rsp & ~IA_OFFCORE_RSP_MASK_I7WM)
 			return (EINVAL);
 		else if ((core_cputype == PMC_CPU_INTEL_SANDYBRIDGE ||
diff --git a/sys/dev/hwpmc/hwpmc_intel.c b/sys/dev/hwpmc/hwpmc_intel.c
index 728d4f3584ed..6cf37b0c47dd 100644
--- a/sys/dev/hwpmc/hwpmc_intel.c
+++ b/sys/dev/hwpmc/hwpmc_intel.c
@@ -147,15 +147,22 @@ pmc_intel_initialize(void)
 				 * Per Intel document 253669-032 9/2009,
 				 * pages A-2 and A-57
 				 */
-		case 0x2E:
 			cputype = PMC_CPU_INTEL_COREI7;
 			nclasses = 5;
 			break;
+		case 0x2E:
+			cputype = PMC_CPU_INTEL_NEHALEM_EX;
+			nclasses = 3;
+			break;
 		case 0x25:	/* Per Intel document 253669-033US 12/2009. */
 		case 0x2C:	/* Per Intel document 253669-033US 12/2009. */
 			cputype = PMC_CPU_INTEL_WESTMERE;
 			nclasses = 5;
 			break;
+		case 0x2F:	/* Westmere-EX, seen in wild */
+			cputype = PMC_CPU_INTEL_WESTMERE_EX;
+			nclasses = 3;
+			break;
 		case 0x2A:	/* Per Intel document 253669-039US 05/2011. */
 			cputype = PMC_CPU_INTEL_SANDYBRIDGE;
 			nclasses = 5;
@@ -218,9 +225,11 @@ pmc_intel_initialize(void)
 	case PMC_CPU_INTEL_CORE2:
 	case PMC_CPU_INTEL_CORE2EXTREME:
 	case PMC_CPU_INTEL_COREI7:
+	case PMC_CPU_INTEL_NEHALEM_EX:
 	case PMC_CPU_INTEL_IVYBRIDGE:
 	case PMC_CPU_INTEL_SANDYBRIDGE:
 	case PMC_CPU_INTEL_WESTMERE:
+	case PMC_CPU_INTEL_WESTMERE_EX:
 	case PMC_CPU_INTEL_SANDYBRIDGE_XEON:
 	case PMC_CPU_INTEL_IVYBRIDGE_XEON:
 	case PMC_CPU_INTEL_HASWELL:
@@ -307,10 +316,12 @@ pmc_intel_finalize(struct pmc_mdep *md)
 	case PMC_CPU_INTEL_CORE2:
 	case PMC_CPU_INTEL_CORE2EXTREME:
 	case PMC_CPU_INTEL_COREI7:
+	case PMC_CPU_INTEL_NEHALEM_EX:
 	case PMC_CPU_INTEL_HASWELL:
 	case PMC_CPU_INTEL_IVYBRIDGE:
 	case PMC_CPU_INTEL_SANDYBRIDGE:
 	case PMC_CPU_INTEL_WESTMERE:
+	case PMC_CPU_INTEL_WESTMERE_EX:
 	case PMC_CPU_INTEL_SANDYBRIDGE_XEON:
 	case PMC_CPU_INTEL_IVYBRIDGE_XEON:
 		pmc_core_finalize(md);
diff --git a/sys/sys/pmc.h b/sys/sys/pmc.h
index bcc462bd20cf..23405eae601c 100644
--- a/sys/sys/pmc.h
+++ b/sys/sys/pmc.h
@@ -92,6 +92,8 @@
 	__PMC_CPU(INTEL_IVYBRIDGE_XEON, 0x90,   "Intel Ivy Bridge Xeon")	\
 	__PMC_CPU(INTEL_HASWELL, 0x91,   "Intel Haswell")	\
 	__PMC_CPU(INTEL_ATOM_SILVERMONT, 0x92,	"Intel Atom Silvermont")    \
+	__PMC_CPU(INTEL_NEHALEM_EX, 0x93,   "Intel Nehalem Xeon 7500")	\
+	__PMC_CPU(INTEL_WESTMERE_EX, 0x94,   "Intel Westmere Xeon E7")	\
 	__PMC_CPU(INTEL_XSCALE,	0x100,	"Intel XScale")		\
 	__PMC_CPU(MIPS_24K,     0x200,  "MIPS 24K")		\
 	__PMC_CPU(MIPS_OCTEON,  0x201,  "Cavium Octeon")	\