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[PATCH v3 06/15] xen/cpufreq: disable px statistic info in amd-cppc mode
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Penny Zheng <Penny.Zheng@xxxxxxx>
- Date: Thu, 6 Mar 2025 16:39:40 +0800
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- Cc: <ray.huang@xxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Thu, 06 Mar 2025 08:40:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Bypass cnstruction and deconstruction for px statistic info(
cpufreq_statistic_init and cpufreq_statistic_exit) in cpufreq
CPPC mode.
Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
---
v2 -> v3:
- new commit
---
xen/drivers/cpufreq/utility.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c
index e690a484f1..f1fd2fdbce 100644
--- a/xen/drivers/cpufreq/utility.c
+++ b/xen/drivers/cpufreq/utility.c
@@ -98,6 +98,9 @@ int cpufreq_statistic_init(unsigned int cpu)
if ( !pmpt )
return -EINVAL;
+ if ( !(pmpt->init & XEN_PX_INIT) )
+ return 0;
+
spin_lock(cpufreq_statistic_lock);
pxpt = per_cpu(cpufreq_statistic_data, cpu);
@@ -147,8 +150,12 @@ int cpufreq_statistic_init(unsigned int cpu)
void cpufreq_statistic_exit(unsigned int cpu)
{
struct pm_px *pxpt;
+ const struct processor_pminfo *pmpt = processor_pminfo[cpu];
spinlock_t *cpufreq_statistic_lock = &per_cpu(cpufreq_statistic_lock, cpu);
+ if ( !(pmpt->init & XEN_PX_INIT) )
+ return;
+
spin_lock(cpufreq_statistic_lock);
pxpt = per_cpu(cpufreq_statistic_data, cpu);
--
2.34.1
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