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>

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) {