Index: sys/compat/linprocfs/linprocfs.c
===================================================================
--- sys/compat/linprocfs/linprocfs.c
+++ sys/compat/linprocfs/linprocfs.c
@@ -140,6 +140,15 @@
  */
 static char linux_state[] = "RRSTZDD";
 
+/*
+ * Save a local copy of the ext cpu feature3 as it is zeroed by the kernel
+ * in the acpi code.
+ */
+#if defined(__i386__) || defined(__amd64__)
+static u_int lin_cpu_stdext_feature3 = 0;
+static u_int lin_cpu_stdext_l1_feature = 0;
+#endif
+
 /*
  * Filler function for proc/meminfo
  */
@@ -2001,6 +2010,23 @@
 	return (0);
 }
 
+static void
+linprocfs_cache_cpuid()
+{
+#if defined(__i386__) || defined(__amd64__)
+	u_int regs[4];
+
+	if (cpu_high >= 7) {
+		cpuid_count(7, 0, regs);
+		lin_cpu_stdext_feature3 = regs[3];
+		if ((cpu_feature2 & CPUID2_XSAVE) != 0) {
+			cpuid_count(0xd, 0x1, regs);
+			lin_cpu_stdext_l1_feature = regs[0];
+		}
+	}
+#endif
+}
+
 /*
  * Constructor
  */
@@ -2011,6 +2037,8 @@
 	struct pfs_node *dir;
 	struct pfs_node *sys;
 
+	linprocfs_cache_cpuid();
+
 	root = pi->pi_root;
 
 	/* /proc/... */