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Message-Id: <1242058494.5139.7.camel@ht.satnam>
Date: Mon, 11 May 2009 21:44:54 +0530
From: Jaswinder Singh Rajput <jaswinder@...nel.org>
To: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...nel.org>,
Robert Richter <robert.richter@....com>,
x86 maintainers <x86@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [git-pull -tip] x86: Addition of cpufeatures to friendly access
miscellaneous MSRs
Complete log is available at:
http://git.kernel.org/?p=linux/kernel/git/jaswinder/linux-2.6-cpu.git;a=shortlog;h=x86/cpufeature
The following changes since commit 3e0c373749d7eb5b354ac0b043f2b2cdf84eefef:
Yinghai Lu (1):
x86: clean up and fix setup_clear/force_cpu_cap handling
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6-cpu.git x86/cpufeature
Jaswinder Singh Rajput (15):
x86: Add cpufeature for Processor Name
x86: Add cpufeatures for Advanced Power Management
x86: Add cpufeature for Microcode update
x86: Add cpufeature for Cache MSRs
x86: Add cpufeature for Hard and Soft Poweron configuration
x86: Add cpufeature for Scaleable bus speed
x86: Add cpufeature for Miscellaneous Features
x86: Add cpufeature for Platform feature
x86: Add cpufeature for Hardware configuration
x86: Add cpufeature for System configuration
x86: Add cpufeature for System management mode (SMM)
x86: Add cpufeature for MM configuration
x86: Add cpufeature for Bus configuration
x86: Add cpufeature for performance frequency APERF/MPERF
x86: Add cpufeature for ancient performance monitoring
arch/x86/include/asm/cpufeature.h | 35 ++++++++--
arch/x86/include/asm/processor.h | 1 -
arch/x86/kernel/cpu/Makefile | 2 +-
arch/x86/kernel/cpu/amd.c | 35 +++++++---
arch/x86/kernel/cpu/common.c | 17 ++++-
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 9 +--
arch/x86/kernel/cpu/intel.c | 106 ++++++++++++++++++++++++----
arch/x86/kernel/cpu/powerflags.c | 20 -----
arch/x86/kernel/cpu/proc.c | 14 ----
arch/x86/kernel/microcode_amd.c | 3 +
arch/x86/kernel/microcode_intel.c | 3 +
11 files changed, 172 insertions(+), 73 deletions(-)
delete mode 100644 arch/x86/kernel/cpu/powerflags.c
complete diff:
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 13cc6a5..f660e99 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 +76,6 @@
#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_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 */
@@ -153,8 +152,24 @@
* Auxiliary flags: Linux defined - For features scattered in various
* CPUID levels like 0x6, 0xA etc
*/
-#define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */
-#define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */
+#define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */
+#define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */
+#define X86_FEATURE_PNAME (7*32+ 2) /* Processor Name */
+#define X86_FEATURE_MICROCODE (7*32+ 3) /* Microcode update */
+#define X86_FEATURE_CACHE (7*32+ 4) /* BBL_CR_* MSRs (PII & PIII) */
+#define X86_FEATURE_CACHE_CTL (7*32+ 5) /* Cache control MSRs */
+#define X86_FEATURE_HARD_POWERON (7*32+ 6) /* Hard Poweron configuration*/
+#define X86_FEATURE_SOFT_POWERON (7*32+ 7) /* Soft Poweron configuration*/
+#define X86_FEATURE_FSB_FREQ (7*32+ 8) /* Scaleable bus speed */
+#define X86_FEATURE_MISC (7*32+ 9) /* Miscellaneous features */
+#define X86_FEATURE_PLATFORM (7*32+ 10) /* Platform feature */
+#define X86_FEATURE_HW_CFG (7*32+ 11) /* Hardware configuration */
+#define X86_FEATURE_SYS_CFG (7*32+ 12) /* System configuration */
+#define X86_FEATURE_SMM (7*32+ 13) /* System Management Mode */
+#define X86_FEATURE_MM_CFG (7*32+ 14) /* MM configuration */
+#define X86_FEATURE_BUS_CFG (7*32+ 15) /* Bus configuration */
+#define X86_FEATURE_PERF_FREQ (7*32+ 16) /* Performance frequency */
+#define X86_FEATURE_PERFMON (7*32+ 17) /* Performance monitoring */
/* Virtualization flags: Linux defined */
#define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
@@ -163,12 +178,22 @@
#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) /* Temperatue 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>
extern const char * const x86_cap_flags[NCAPINTS*32];
-extern const char * const x86_power_flags[32];
#define test_cpu_cap(c, bit) \
test_bit(bit, (unsigned long *)((c)->x86_capability))
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index fed93fe..163b447 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -90,7 +90,6 @@ struct cpuinfo_x86 {
/* in KB - valid for CPUS which support this call: */
int x86_cache_size;
int x86_cache_alignment; /* In bytes */
- int x86_power;
unsigned long loops_per_jiffy;
#ifdef CONFIG_SMP
/* cpus sharing the last level cache: */
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 4e242f9..3e5da32 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -8,7 +8,7 @@ CFLAGS_REMOVE_common.o = -pg
endif
obj-y := intel_cacheinfo.o addon_cpuid_features.o
-obj-y += proc.o capflags.o powerflags.o common.o
+obj-y += proc.o capflags.o common.o
obj-y += vmware.o hypervisor.o
obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 7e4a459..849d794 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -333,15 +333,6 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
{
early_init_amd_mc(c);
- /*
- * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
- * with P/T states and does not stop in deep C-states
- */
- if (c->x86_power & (1 << 8)) {
- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
- set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
- }
-
#ifdef CONFIG_X86_64
set_cpu_cap(c, X86_FEATURE_SYSCALL32);
#else
@@ -485,6 +476,32 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
}
}
#endif
+
+ /* Set cpufeatures for miscellaneous MSRs */
+ if (c->x86 >= 7) { /* K7+ */
+ /* MSRC001_0015 Hardware Configuration Register (HWCR) */
+ set_cpu_cap(c, X86_FEATURE_HW_CFG);
+ /* Performance monitoring support */
+ set_cpu_cap(c, X86_FEATURE_PERFMON);
+ }
+ if (c->x86 >= 8) { /* K8+ */
+ /*
+ * System configuration MSRs:
+ * MSRC001_0010 System Configuration Register (SYS_CFG)
+ * MSRC001_001F Northbridge Configuration Register (NB_CFG)
+ */
+ set_cpu_cap(c, X86_FEATURE_SYS_CFG);
+ /* SMM MSRs C001_0111-C001_0113 & C001_0050-C000_0056 */
+ set_cpu_cap(c, X86_FEATURE_SMM);
+ }
+ if (c->x86 >= 0x10) { /* fam10h+ */
+ /* MSRC001_1022 Data Cache Configuration (DC_CFG) */
+ set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
+ /* MSRC001_0058 MMIO Configuration Base Address Register*/
+ set_cpu_cap(c, X86_FEATURE_MM_CFG);
+ /* MSRC001_1023 Bus Unit Configuration Register (BU_CFG)*/
+ set_cpu_cap(c, X86_FEATURE_BUS_CFG);
+ }
}
#ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index e7fd5c4..511a970 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -360,6 +360,7 @@ static void __cpuinit get_model_name(struct cpuinfo_x86 *c)
cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
c->x86_model_id[48] = 0;
+ set_cpu_cap(c, X86_FEATURE_PNAME);
/*
* Intel chips right-justify this string for some dumb reason;
@@ -575,8 +576,22 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
#endif
if (c->extended_cpuid_level >= 0x80000007)
- c->x86_power = cpuid_edx(0x80000007);
+ c->x86_capability[9] = cpuid_edx(0x80000007);
+ /*
+ * Advanced power management is 8000_0007 edx.
+ * Bit 8 is TSC runs at constant rate with P/T states
+ * and does not stop in deep C-states.
+ *
+ * It is also reliable across cores and sockets. (but not across
+ * cabinets - we turn it off in that case explicitly.)
+ */
+ if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
+ set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+ set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE);
+ if (c->x86_vendor == X86_VENDOR_INTEL)
+ sched_clock_stable = 1;
+ }
}
static void __cpuinit identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 208ecf6..3811ca6 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -60,7 +60,6 @@ enum {
};
#define INTEL_MSR_RANGE (0xffff)
-#define CPUID_6_ECX_APERFMPERF_CAPABILITY (0x1)
struct acpi_cpufreq_data {
struct acpi_processor_performance *acpi_data;
@@ -735,12 +734,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
acpi_processor_notify_smm(THIS_MODULE);
/* Check for APERF/MPERF support in hardware */
- if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) {
- unsigned int ecx;
- ecx = cpuid_ecx(6);
- if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY)
- acpi_cpufreq_driver.getavg = get_measured_perf;
- }
+ if (cpu_has(c, X86_FEATURE_PERF_FREQ))
+ acpi_cpufreq_driver.getavg = get_measured_perf;
dprintk("CPU%u - ACPI performance management activated.\n", cpu);
for (i = 0; i < perf->state_count; i++)
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 7437fa1..e3ce8c6 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -61,20 +61,6 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
c->x86_phys_bits = 36;
/*
- * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
- * with P/T states and does not stop in deep C-states.
- *
- * It is also reliable across cores and sockets. (but not across
- * cabinets - we turn it off in that case explicitly.)
- */
- if (c->x86_power & (1 << 8)) {
- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
- set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
- set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE);
- sched_clock_stable = 1;
- }
-
- /*
* There is a known erratum on Pentium III and Core Solo
* and Core Duo CPUs.
* " Page with PAT set to WC while associated MTRR is UC
@@ -324,7 +310,9 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
/* Check for version and the number of counters */
if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
- }
+ } else if (c->x86 >= 5)
+ /* ancient performance monitoring support */
+ set_cpu_cap(c, X86_FEATURE_PERFMON);
if (cpu_has_xmm2)
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
@@ -404,6 +392,94 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
if (cpu_has(c, X86_FEATURE_VMX))
detect_vmx_virtcap(c);
+
+ /* Set cpufeatures for miscellaneous MSRs */
+ if (c->x86 == 6) {
+ /* Miscellaneous Features IA32_MISC_ENABLE */
+ set_cpu_cap(c, X86_FEATURE_MISC);
+
+ switch (c->x86_model) {
+ case 1: /* Pentium Pro */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /* !Miscellaneous Features IA32_MISC_ENABLE */
+ clear_cpu_cap(c, X86_FEATURE_MISC);
+ break;
+
+ case 3: case 5: /* Pentium II */
+ case 7: case 8: case 0xA: case 0xB: /* Pentium III */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /* BBL_CR_* MSRs (Pentium II & III processors) */
+ set_cpu_cap(c, X86_FEATURE_CACHE);
+ /* BBL_CR_CTL* MSRs (Cache control MSRs) */
+ set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
+ /* !Miscellaneous Features IA32_MISC_ENABLE */
+ clear_cpu_cap(c, X86_FEATURE_MISC);
+ break;
+
+ case 9: case 0xD: /* Pentium M */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /* BBL_CR_CTL* MSRs (Cache control MSRs) */
+ set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
+ break;
+
+ case 0xE: /* Core */
+ case 0xF: case 0x17: /* Core 2 */
+ case 0x1C: /* ATOM */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /* BBL_CR_CTL* MSRs (Cache control MSRs) */
+ set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
+ /* Scaleable bus speed MSR_FSB_FREQ */
+ set_cpu_cap(c, X86_FEATURE_FSB_FREQ);
+ break;
+
+ case 0x16: /* Celeron Core */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ break;
+
+ case 0x1D: /* Xeon MP */
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON*/
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /*
+ * Soft Poweron configuration MSR_EBC_SOFT_POWERON
+ * Frequency configuration MSR_EBC_FREQUENCY_ID
+ */
+ set_cpu_cap(c, X86_FEATURE_SOFT_POWERON);
+ break;
+ }
+ }
+ if (c->x86 == 0xF) {
+ /* Hard Poweron configuration MSR_EBL_CR_POWERON */
+ set_cpu_cap(c, X86_FEATURE_HARD_POWERON);
+ /*
+ * Soft Poweron configuration MSR_EBC_SOFT_POWERON
+ * Frequency configuration MSR_EBC_FREQUENCY_ID
+ */
+ set_cpu_cap(c, X86_FEATURE_SOFT_POWERON);
+
+ /* Miscellaneous Features IA32_MISC_ENABLE */
+ set_cpu_cap(c, X86_FEATURE_MISC);
+
+ switch (c->x86_model) {
+ case 3: case 4: case 6:
+ /* Platform Feature MSR_PLATFORM_BRV */
+ set_cpu_cap(c, X86_FEATURE_PLATFORM);
+ break;
+ }
+ }
+ if (c->cpuid_level >= 6) {
+ /*
+ * Hardware Coordination Feedback Capability
+ * (Presence of IA32_APERF, IA32_MPERF MSRs)
+ */
+ l2 = cpuid_ecx(6);
+ if (l2 & 1)
+ set_cpu_cap(c, X86_FEATURE_PERF_FREQ);
+ }
}
#ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/powerflags.c b/arch/x86/kernel/cpu/powerflags.c
deleted file mode 100644
index 5abbea2..0000000
--- a/arch/x86/kernel/cpu/powerflags.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Strings for the various x86 power flags
- *
- * This file must not contain any executable code.
- */
-
-#include <asm/cpufeature.h>
-
-const char *const x86_power_flags[32] = {
- "ts", /* temperature sensor */
- "fid", /* frequency id control */
- "vid", /* voltage id control */
- "ttp", /* thermal trip */
- "tm",
- "stc",
- "100mhzsteps",
- "hwpstate",
- "", /* tsc invariant mapped to constant_tsc */
- /* nothing */
-};
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index f93047f..523bf39 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -121,20 +121,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
c->x86_phys_bits, c->x86_virt_bits);
#endif
-
- seq_printf(m, "power management:");
- for (i = 0; i < 32; i++) {
- if (c->x86_power & (1 << i)) {
- if (i < ARRAY_SIZE(x86_power_flags) &&
- x86_power_flags[i])
- seq_printf(m, "%s%s",
- x86_power_flags[i][0]?" ":"",
- x86_power_flags[i]);
- else
- seq_printf(m, " [%d]", i);
- }
- }
-
seq_printf(m, "\n\n");
return 0;
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 453b579..ec9e5e2 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -95,6 +95,9 @@ static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
"supported\n", cpu, c->x86);
return -1;
}
+ /* setting microcode update feature to friendly access of UCODE MSRs */
+ set_cpu_cap(c, X86_FEATURE_MICROCODE);
+
rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
printk(KERN_INFO "microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
return 0;
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 149b9ec..2fcaa58 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -168,6 +168,9 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
return -1;
}
+ /* setting microcode update feature to friendly access of UCODE MSRs */
+ set_cpu_cap(c, X86_FEATURE_MICROCODE);
+
csig->sig = cpuid_eax(0x00000001);
if ((c->x86_model >= 5) || (c->x86 > 6)) {
--
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