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[PATCH v5 07/18] xen/cpufreq: disable px statistic info in amd-cppc mode
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Penny Zheng <Penny.Zheng@xxxxxxx>
- Date: Tue, 27 May 2025 16:48:22 +0800
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- Cc: <ray.huang@xxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Tue, 27 May 2025 08:49:33 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
We want to bypass construction of px statistic info, while not bypassing
cpufreq_statistic_lock initialization for a good reason, in
cpufreq_statistic_init() for amd-cppc mode, as P-states is not necessary there.
Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v3 -> v4:
- remove unnecessary stub for cpufreq_statistic_exit()
---
v4 -> v5:
- refactor commit message
---
xen/drivers/cpufreq/utility.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c
index e690a484f1..b35e2eb1b6 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);
--
2.34.1
|
