[PATCH] Display Intel Dynamic Acceleration feature in /proc/cpuinfo


Display Intel Dynamic Acceleration feature in /proc/cpuinfo. This feature
will be enabled automatically by current acpi-cpufreq driver and cpufreq.

Refer to Intel Software Developer's Manual for more details about the feature.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>

Index: linux-2.6.22-rc-mm/arch/i386/kernel/cpu/proc.c
===================================================================
--- linux-2.6.22-rc-mm.orig/arch/i386/kernel/cpu/proc.c
+++ linux-2.6.22-rc-mm/arch/i386/kernel/cpu/proc.c
@@ -41,7 +41,7 @@ static int show_cpuinfo(struct seq_file
"cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
NULL, NULL, NULL, NULL,
"constant_tsc", "up", NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "ida", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

/* Intel-defined (#2) */
Index: linux-2.6.22-rc-mm/arch/x86_64/kernel/setup.c
===================================================================
--- linux-2.6.22-rc-mm.orig/arch/x86_64/kernel/setup.c
+++ linux-2.6.22-rc-mm/arch/x86_64/kernel/setup.c
@@ -949,7 +949,7 @@ static int show_cpuinfo(struct seq_file
/* Other (Linux-defined) */
"cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
"constant_tsc", NULL, NULL,
- "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "up", NULL, NULL, NULL, "ida", NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

Index: linux-2.6.22-rc-mm/include/asm-i386/cpufeature.h
===================================================================
--- linux-2.6.22-rc-mm.orig/include/asm-i386/cpufeature.h
+++ linux-2.6.22-rc-mm/include/asm-i386/cpufeature.h
@@ -81,6 +81,7 @@
#define X86_FEATURE_BTS (3*32+13) /* Branch Trace Store */
#define X86_FEATURE_LAPIC_TIMER_BROKEN (3*32+ 14) /* lapic timer broken in C1 */
#define X86_FEATURE_SYNC_RDTSC (3*32+15) /* RDTSC synchronizes the CPU */
+#define X86_FEATURE_IDA (3*32+16) /* Intel Dynamic Acceleration */

/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
#define X86_FEATURE_XMM3 (4*32+ 0) /* Streaming SIMD Extensions-3 */
Index: linux-2.6.22-rc-mm/include/asm-x86_64/cpufeature.h
===================================================================
--- linux-2.6.22-rc-mm.orig/include/asm-x86_64/cpufeature.h
+++ linux-2.6.22-rc-mm/include/asm-x86_64/cpufeature.h
@@ -70,6 +70,7 @@
#define X86_FEATURE_ARCH_PERFMON (3*32+9) /* Intel Architectural PerfMon */
#define X86_FEATURE_PEBS (3*32+10) /* Precise-Event Based Sampling */
#define X86_FEATURE_BTS (3*32+11) /* Branch Trace Store */
+#define X86_FEATURE_IDA (3*32+12) /* Intel Dynamic Acceleration */

/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
#define X86_FEATURE_XMM3 (4*32+ 0) /* Streaming SIMD Extensions-3 */
Index: linux-2.6.22-rc-mm/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
===================================================================
--- linux-2.6.22-rc-mm.orig/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ linux-2.6.22-rc-mm/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -58,6 +58,7 @@ enum {

#define INTEL_MSR_RANGE (0xffff)
#define CPUID_6_ECX_APERFMPERF_CAPABILITY (0x1)
+#define CPUID_6_EAX_IDA_CAPABILITY (0x2)

struct acpi_cpufreq_data {
struct acpi_processor_performance *acpi_data;
@@ -699,10 +700,20 @@ static int acpi_cpufreq_cpu_init(struct

/* Check for APERF/MPERF support in hardware */
if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) {
- unsigned int ecx;
+ unsigned int eax, ecx;
ecx = cpuid_ecx(6);
if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY)
acpi_cpufreq_driver.getavg = get_measured_perf;
+
+ eax = cpuid_eax(6);
+ if (eax & CPUID_6_EAX_IDA_CAPABILITY) {
+ unsigned int i;
+
+ for_each_cpu_mask(i, policy->cpus) {
+ struct cpuinfo_x86 *c = &cpu_data[i];
+ set_bit(X86_FEATURE_IDA, c->x86_capability);
+ }
+ }
}

dprintk("CPU%u - ACPI performance management activated.\n", cpu);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Relevant Pages

  • 5348 Karshner St
    ... you can refer the entertainment much more tomorrow. ... Somebody feature the boring formulation and shed it unlike its ...
    (sci.crypt)
  • Re: advice for running parallels or vmware on mac pro
    ... boxed version of Parallels bought fairly recently has no mention whatever of ... BootCamp anywhere, not in the index, not in the table of contents, nowhere in ... That is yet another confusion in their labeling, sometimes they refer to ... is applied when a new feature is added, a feature which can be downloaded ...
    (comp.sys.mac.system)
  • Re: Damn you, FEDEX! or Nikon D40 lost in Springfield, MO blackhole.
    ... the 2 mp Mavica he had been using with a Nikon D40. ... After shopping around, he got me to order one for him. ... The shipper had it insured, but from what I have read it could take weeks to sort this crap out. ... You may get your insurance from FedEx and a couple weeks later they find it and deliver it. ...
    (alt.photography)
  • Re: LoadLibrary fails - one or more arguments are invalid
    ... For detailed steps on how to use "Image File Execution Options", ... refer to http://blogs.msdn.com/greggm/archive/2005/02/21/377663.aspx. ... Although this feature is for debugging, it is really just a general ...
    (microsoft.public.dotnet.languages.vc)
  • Re: everything shrunk...
    ... I'll save your post and refer to it if I have ... I already tried the "restore" feature to bring everything ... PC Buyer Beware! ...
    (alt.os.windows-xp)