Save the cpuid(6) eax bits in the cpu_info and report the SENSOR and ARAT

bits from it.

ok krw@ kettenis@

3 files changed, 30 insertions, 11 deletions

diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c
index 40f0a9bfac0..1aa2ba82fbd 100644
--- a/sys/arch/i386/i386/machdep.c
+++ b/sys/arch/i386/i386/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.569 2015/04/18 22:16:21 kettenis Exp $	*/
+/*	$OpenBSD: machdep.c,v 1.570 2015/05/28 20:10:58 guenther Exp $	*/
 /*	$NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $	*/
 
 /*-
@@ -1077,6 +1077,11 @@ const struct cpu_cpuid_feature cpu_seff0_ebxfeatures[] = {
 	{ SEFF0EBX_SMAP,	"SMAP" },
 };
 
+const struct cpu_cpuid_feature cpu_tpm_eaxfeatures[] = {
+	{ TPM_SENSOR,		"SENSOR" },
+	{ TPM_ARAT,		"ARAT" },
+};
+
 const struct cpu_cpuid_feature i386_cpuid_eaxperf[] = {
 	{ CPUIDEAX_VERID,	"PERF" },
 };
@@ -1481,14 +1486,7 @@ intelcore_update_sensor(void *args)
 void
 intel686_cpusensors_setup(struct cpu_info *ci)
 {
-	u_int regs[4];
-
-	if (!CPU_IS_PRIMARY(ci) || cpuid_level < 0x06)
-		return;
-
-	/* CPUID.06H.EAX[0] = 1 tells us if we have on-die sensor */
-	cpuid(0x06, regs);
-	if ((regs[0] & 0x01) != 1)
+	if (!CPU_IS_PRIMARY(ci) || (ci->ci_feature_tpmflags & TPM_SENSOR) == 0)
 		return;
 
 	/* Setup the sensors structures */
@@ -1988,6 +1986,20 @@ identifycpu(struct cpu_info *ci)
 						    (numbits == 0 ? "" : ","),
 						    cpu_seff0_ebxfeatures[i].feature_name);
 			}
+
+			if (!strcmp(cpu_vendor, "GenuineIntel") &&
+			    cpuid_level >= 0x06 ) {
+				u_int dummy;
+
+				CPUID(0x06, ci->ci_feature_tpmflags, dummy,
+				    dummy, dummy);
+				max = nitems(cpu_tpm_eaxfeatures);
+				for (i = 0; i < max; i++)
+					if (ci->ci_feature_tpmflags &
+					    cpu_tpm_eaxfeatures[i].feature_bit)
+						printf(",%s", cpu_tpm_eaxfeatures[i].feature_name);
+			}
+
 			printf("\n");
 		}
 	}
diff --git a/sys/arch/i386/include/cpu.h b/sys/arch/i386/include/cpu.h
index 14033d378d0..623154e993d 100644
--- a/sys/arch/i386/include/cpu.h
+++ b/sys/arch/i386/include/cpu.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cpu.h,v 1.139 2015/04/18 22:16:21 kettenis Exp $	*/
+/*	$OpenBSD: cpu.h,v 1.140 2015/05/28 20:10:58 guenther Exp $	*/
 /*	$NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $	*/
 
 /*-
@@ -118,6 +118,7 @@ struct cpu_info {
 	u_int32_t	ci_model;		/* extended cpuid model */
 	u_int32_t	ci_feature_flags;	/* X86 CPUID feature bits */
 	u_int32_t	ci_feature_sefflags;	/* more CPUID feature bits */
+	u_int32_t	ci_feature_tpmflags;	/* thermal & power bits */
 	u_int32_t	cpu_class;		/* CPU class */
 	u_int32_t	ci_cflushsz;		/* clflush cache-line size */
 
diff --git a/sys/arch/i386/include/specialreg.h b/sys/arch/i386/include/specialreg.h
index 3bb33b3f4ce..7f1f341dfdf 100644
--- a/sys/arch/i386/include/specialreg.h
+++ b/sys/arch/i386/include/specialreg.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: specialreg.h,v 1.50 2015/03/25 20:59:30 kettenis Exp $	*/
+/*	$OpenBSD: specialreg.h,v 1.51 2015/05/28 20:10:58 guenther Exp $	*/
 /*	$NetBSD: specialreg.h,v 1.7 1994/10/27 04:16:26 cgd Exp $	*/
 
 /*-
@@ -178,6 +178,12 @@
 #define	SEFF0EBX_SMAP		0x00100000 /* Supervisor mode access prevent */
 
 /*
+ * Thermal and Power Management (CPUID function 0x6) EAX bits
+ */
+#define	TPM_SENSOR	0x00000001	 /* Digital temp sensor */
+#define	TPM_ARAT	0x00000004	 /* APIC Timer Always Running */
+
+/*
  * "Architectural Performance Monitoring" bits (CPUID function 0x0a):
  * EAX bits
  */