[Xen-devel] [PATCH 1/2] cpufreq, powernow: enable/disable core performance boost for all cpus in policy

[Jacob Shin <jacob.shin@xxxxxxx>]

Currently, enable/disable turbo mode on AMD is broken:

$ xenpm enable-turbo-mode 0 <-- works and proper CPU MSR bit is set
$ xenpm enable-turbo-mode 1 <-- silently broken, MSR bit not set

Since ->turbo is per policy, when user requests to enable/disable
turbo mode, we need to set the bit in all of the ->cpus that this
policy affects.
---
 xen/arch/x86/acpi/cpufreq/powernow.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/acpi/cpufreq/powernow.c 
b/xen/arch/x86/acpi/cpufreq/powernow.c
index 2c9fea2..81ba17f 100644
--- a/xen/arch/x86/acpi/cpufreq/powernow.c
+++ b/xen/arch/x86/acpi/cpufreq/powernow.c
@@ -85,7 +85,7 @@ static int powernow_cpufreq_update (int cpuid,
     if (!cpumask_test_cpu(cpuid, &cpu_online_map))
         return -EINVAL;
 
-    on_selected_cpus(cpumask_of(cpuid), update_cpb, policy, 1);
+    on_selected_cpus(policy->cpus, update_cpb, policy, 1);
 
     return 0;
 }
-- 
1.7.9.5



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