diff mbox series

[v4,11/13] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification

Message ID 20241021180252.3531-12-mario.limonciello@amd.com
State Superseded
Headers show
Series Add support for AMD hardware feedback interface | expand

Commit Message

Mario Limonciello Oct. 21, 2024, 6:02 p.m. UTC 
On designs that have workload classification, it's preferred that
the amd-hfi driver is used to provide hints to the scheduler of
which cores to use instead of the amd-pstate driver.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v2->v3:
 * Disable prefcore sysfs file too
---
 drivers/cpufreq/amd-pstate.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 2670bdcad6eda..4dea5a6f86c11 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -782,6 +782,12 @@  static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata)
 	/* user disabled or not detected */
 	if (!amd_pstate_prefcore)
 		return;
+	/* should use amd-hfi instead */
+	if (boot_cpu_has(X86_FEATURE_AMD_WORKLOAD_CLASS) &&
+	    IS_ENABLED(CONFIG_AMD_HFI)) {
+		amd_pstate_prefcore = false;
+		return;
+	}
 
 	cpudata->hw_prefcore = true;