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Date: Wed, 13 May 2009 00:36:30 +0530
From: Jaswinder Singh Rajput <jaswinder@...nel.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: "H. Peter Anvin" <hpa@...nel.org>,
Robert Richter <robert.richter@....com>,
Dave Jones <davej@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH 3/10 -tip] x86: Add cpufeatures for Advanced Power
Management
On Tue, 2009-05-12 at 21:09 +0530, Jaswinder Singh Rajput wrote:
> Add Advanced Power Management (Function 8000_0007h), edx
>
> /proc/cpuinfo (before)
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc pni cx16
> lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch osvw skinit pname
>
> /proc/cpuinfo (after)
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> rdtscp lm 3dnowext 3dnow rep_good tsc_reliable nonstop_tsc pni cx16
> lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch osvw skinit pname
> ts ttp htc stc 100mhzsteps hwpstate constant_tsc
>
> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> ---
New patch after adding helper cpufeature for Advanced Power Management
availability and fixing typo.
[PATCH -tip] x86: Add cpufeatures for Advanced Power Management
Add Advanced Power Management (Function 8000_0007h), edx
/proc/cpuinfo (before)
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc pni cx16
lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch osvw skinit pname
/proc/cpuinfo (after)
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
rdtscp lm 3dnowext 3dnow rep_good tsc_reliable nonstop_tsc pni cx16
lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch osvw skinit pname
ts ttp htc stc 100mhzsteps hwpstate constant_tsc
Also added helper cpufeature to check Advanced Power Management is available.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
---
arch/x86/include/asm/cpufeature.h | 15 +++++++++++++--
arch/x86/kernel/cpu/common.c | 16 ++++++++++++----
2 files changed, 25 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index e1a4cc4..c4e2e39 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -6,7 +6,7 @@
#include <asm/required-features.h>
-#define NCAPINTS 9 /* N 32-bit words worth of info */
+#define NCAPINTS 10 /* N 32-bit words worth of info */
/*
* Note: If the comment begins with a quoted string, that string is used
@@ -76,7 +76,7 @@
#define X86_FEATURE_K7 (3*32+ 5) /* "" Athlon */
#define X86_FEATURE_P3 (3*32+ 6) /* "" P3 */
#define X86_FEATURE_P4 (3*32+ 7) /* "" P4 */
-#define X86_FEATURE_CONSTANT_TSC (3*32+ 8) /* TSC ticks at a constant rate */
+#define X86_FEATURE_POWER_MGMT (3*32+ 8) /* Advanced Power Management */
#define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */
#define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */
#define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */
@@ -164,6 +164,17 @@
#define X86_FEATURE_EPT (8*32+ 3) /* Intel Extended Page Table */
#define X86_FEATURE_VPID (8*32+ 4) /* Intel Virtual Processor ID */
+/* Advanced Power Management (Function 8000_0007h), edx */
+#define X86_FEATURE_TS (9*32+ 0) /* Temperature sensor */
+#define X86_FEATURE_FID (9*32+ 1) /* Frequency ID control */
+#define X86_FEATURE_VID (9*32+ 2) /* Voltage ID control */
+#define X86_FEATURE_TTP (9*32+ 3) /* Thermal trip */
+#define X86_FEATURE_HTC (9*32+ 4) /* Hardware thermal control */
+#define X86_FEATURE_STC (9*32+ 5) /* Software thermal control */
+#define X86_FEATURE_100MHZSTEPS (9*32+ 6) /* 100 MHz multiplier control */
+#define X86_FEATURE_HWPSTATE (9*32+ 7) /* Hardware P-State control */
+#define X86_FEATURE_CONSTANT_TSC (9*32+ 8) /* Constant rate TSC ticks */
+
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
#include <linux/bitops.h>
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 3994feb..c98ade3 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -573,6 +573,18 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
if (c->extended_cpuid_level >= 0x80000004)
set_cpu_cap(c, X86_FEATURE_PNAME);
+ /* Advanced Power Management (Function 8000_0007h), edx */
+ if (c->extended_cpuid_level >= 0x80000007) {
+ c->x86_capability[9] = cpuid_edx(0x80000007);
+ c->x86_power = cpuid_edx(0x80000007);
+
+ /*
+ * Adding helper cpufeature to check the availability of
+ * Advanced Power Management (Function 8000_0007h), edx
+ */
+ set_cpu_cap(c, X86_FEATURE_POWER_MGMT);
+ }
+
if (c->extended_cpuid_level >= 0x80000008) {
u32 eax = cpuid_eax(0x80000008);
@@ -583,10 +595,6 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
c->x86_phys_bits = 36;
#endif
-
- if (c->extended_cpuid_level >= 0x80000007)
- c->x86_power = cpuid_edx(0x80000007);
-
}
static void __cpuinit identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
--
1.6.0.6
--
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