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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2006-06-26 06:34:43 +0200
committerLen Brown <len.brown@intel.com>2006-06-26 06:34:43 +0200
commit46f18e3a28295a9e11a6ffa4478241c19bc93735 (patch)
treef563b12a18cadd6583925ce1dbc3bc79538ac866 /arch/i386
parentRevert "swsusp special saveable pages support" commits (diff)
downloadlinux-46f18e3a28295a9e11a6ffa4478241c19bc93735.tar.xz
linux-46f18e3a28295a9e11a6ffa4478241c19bc93735.zip
ACPI: HW P-state coordination support
Treat HW coordination as independent CPUs. This enables per-cpu monintoring of P-states http://bugzilla.kernel.org/show_bug.cgi?id=5737 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c8
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c8
2 files changed, 14 insertions, 2 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 5fd65325b81a..cf0ddc9ee0cd 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -418,8 +418,14 @@ acpi_cpufreq_cpu_init (
goto err_free;
perf = data->acpi_data;
- policy->cpus = perf->shared_cpu_map;
policy->shared_type = perf->shared_type;
+ /*
+ * Will let policy->cpus know about dependency only when software
+ * coordination is required.
+ */
+ if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
+ policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
+ policy->cpus = perf->shared_cpu_map;
if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index f7e4356f6820..8d765509ef59 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -399,8 +399,14 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
dprintk(PFX "obtaining ACPI data failed\n");
return -EIO;
}
- policy->cpus = p->shared_cpu_map;
policy->shared_type = p->shared_type;
+ /*
+ * Will let policy->cpus know about dependency only when software
+ * coordination is required.
+ */
+ if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
+ policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
+ policy->cpus = p->shared_cpu_map;
/* verify the acpi_data */
if (p->state_count <= 1) {