Index: head/sys/x86/include/specialreg.h
===================================================================
--- head/sys/x86/include/specialreg.h
+++ head/sys/x86/include/specialreg.h
@@ -308,6 +308,15 @@
 #define	CPUID_EXTSTATE_XSAVES	0x00000008
 
 /*
+ * AMD extended function 8000_0007h ebx info
+ */
+#define	AMDRAS_MCA_OF_RECOV	0x00000001
+#define	AMDRAS_SUCCOR		0x00000002
+#define	AMDRAS_HW_ASSERT	0x00000004
+#define	AMDRAS_SCALABLE_MCA	0x00000008
+#define	AMDRAS_PFEH_SUPPORT	0x00000010
+
+/*
  * AMD extended function 8000_0007h edx info
  */
 #define	AMDPM_TS		0x00000001
Index: head/sys/x86/include/x86_var.h
===================================================================
--- head/sys/x86/include/x86_var.h
+++ head/sys/x86/include/x86_var.h
@@ -44,6 +44,7 @@
 extern	u_int	cpu_feature2;
 extern	u_int	amd_feature;
 extern	u_int	amd_feature2;
+extern	u_int	amd_rascap;
 extern	u_int	amd_pminfo;
 extern	u_int	via_feature_rng;
 extern	u_int	via_feature_xcrypt;
Index: head/sys/x86/x86/identcpu.c
===================================================================
--- head/sys/x86/x86/identcpu.c
+++ head/sys/x86/x86/identcpu.c
@@ -91,6 +91,7 @@
 u_int	cpu_feature2;		/* Feature flags */
 u_int	amd_feature;		/* AMD feature flags */
 u_int	amd_feature2;		/* AMD feature flags */
+u_int	amd_rascap;		/* AMD RAS capabilities */
 u_int	amd_pminfo;		/* AMD advanced power management info */
 u_int	via_feature_rng;	/* VIA RNG features */
 u_int	via_feature_xcrypt;	/* VIA ACE features */
@@ -1461,6 +1462,7 @@
 	}
 	if (cpu_exthigh >= 0x80000007) {
 		do_cpuid(0x80000007, regs);
+		amd_rascap = regs[1];
 		amd_pminfo = regs[3];
 	}
 	if (cpu_exthigh >= 0x80000008) {