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Message-ID: <20241021180252.3531-12-mario.limonciello@amd.com>
Date: Mon, 21 Oct 2024 13:02:50 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Borislav Petkov <bp@...en8.de>, Hans de Goede <hdegoede@...hat.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
CC: <x86@...nel.org>, "Gautham R . Shenoy" <gautham.shenoy@....com>, "Mario
Limonciello" <mario.limonciello@....com>, Perry Yuan <perry.yuan@....com>,
<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-pm@...r.kernel.org>, <platform-driver-x86@...r.kernel.org>, "Shyam
Sundar S K" <Shyam-sundar.S-k@....com>
Subject: [PATCH v4 11/13] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification
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@....com>
---
v2->v3:
* Disable prefcore sysfs file too
---
drivers/cpufreq/amd-pstate.c | 6 ++++++
1 file changed, 6 insertions(+)
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;
--
2.43.0
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