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[PATCH v10 1/8] xen/cpufreq: make HW_ALL the only expected value for CPPC mode
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Penny Zheng <Penny.Zheng@xxxxxxx>
- Date: Tue, 23 Sep 2025 12:38:19 +0800
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- Cc: <ray.huang@xxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Tue, 23 Sep 2025 04:39:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Right now, no matter for code construction or hardware restriction, HW_ALL
shall be the only expected values in _PSD for AMD CPPC mode
Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
---
v9 - v10:
- new commit
---
xen/drivers/cpufreq/cpufreq.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
index fe6bd7ff25..4b74f5590b 100644
--- a/xen/drivers/cpufreq/cpufreq.c
+++ b/xen/drivers/cpufreq/cpufreq.c
@@ -765,6 +765,16 @@ int set_cppc_pminfo(unsigned int acpi_id,
goto out;
}
+ /* Right now, HW_ALL shall be the only expected value in CPPC mode */
+ if ( cppc_data->shared_type != CPUFREQ_SHARED_TYPE_HW )
+ {
+ ret = -EINVAL;
+ printk_once(XENLOG_ERR
+ "Unsupported sharing type %u in CPPC mode\n",
+ cppc_data->shared_type);
+ goto out;
+ }
+
if ( cppc_data->flags & XEN_CPPC_CPC )
{
if ( cppc_data->cpc.highest_perf == 0 ||
--
2.34.1
|
