From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Thu, 29 Dec 2011 10:36:41 +0000 (+0800)
Subject: acpi/cpu: Report that Turbo Boost is enabled on Intel CPUs
X-Git-Tag: v3.0.0~233
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/7ff747df9a8977ba782345fb8b299a1484fc0fc5

acpi/cpu: Report that Turbo Boost is enabled on Intel CPUs

If Turbo Boost is enabled, the current CPU frequencies reported by
hw.acpi.cpu are not correct, sigh.
---

diff --git a/sys/platform/pc32/acpica5/acpi_cpu_machdep.c b/sys/platform/pc32/acpica5/acpi_cpu_machdep.c
index 4a87be5a94..ba7d376287 100644
--- a/sys/platform/pc32/acpica5/acpi_cpu_machdep.c
+++ b/sys/platform/pc32/acpica5/acpi_cpu_machdep.c
@@ -4,6 +4,7 @@
 #include <sys/systm.h>
 #include <sys/sysctl.h>
 
+#include <machine/cpufunc.h>
 #include <machine/cputypes.h>
 #include <machine/md_var.h>
 #include <machine/specialreg.h>
@@ -16,6 +17,16 @@ uint32_t
 acpi_cpu_md_features(void)
 {
 	if (cpu_vendor_id == CPU_VENDOR_INTEL) {
+		uint32_t regs[4];
+		static int reported;
+
+		if (!reported) {
+			do_cpuid(0x6, regs);
+			if (regs[0] & 0x2)
+				kprintf("Turbo mode enabled in BIOS\n");
+			reported = 1;
+		}
+
 		if (cpu_feature2 & CPUID2_EST) {
 			return (ACPI_PDC_PX_MSR |
 			    ACPI_PDC_MP_PX_SWCORD |
diff --git a/sys/platform/pc64/acpica5/acpi_cpu_machdep.c b/sys/platform/pc64/acpica5/acpi_cpu_machdep.c
index 4a87be5a94..ba7d376287 100644
--- a/sys/platform/pc64/acpica5/acpi_cpu_machdep.c
+++ b/sys/platform/pc64/acpica5/acpi_cpu_machdep.c
@@ -4,6 +4,7 @@
 #include <sys/systm.h>
 #include <sys/sysctl.h>
 
+#include <machine/cpufunc.h>
 #include <machine/cputypes.h>
 #include <machine/md_var.h>
 #include <machine/specialreg.h>
@@ -16,6 +17,16 @@ uint32_t
 acpi_cpu_md_features(void)
 {
 	if (cpu_vendor_id == CPU_VENDOR_INTEL) {
+		uint32_t regs[4];
+		static int reported;
+
+		if (!reported) {
+			do_cpuid(0x6, regs);
+			if (regs[0] & 0x2)
+				kprintf("Turbo mode enabled in BIOS\n");
+			reported = 1;
+		}
+
 		if (cpu_feature2 & CPUID2_EST) {
 			return (ACPI_PDC_PX_MSR |
 			    ACPI_PDC_MP_PX_SWCORD |