linux-kernel - [PATCH v8 11/13] platform/x86/amd: hfi: Set ITMT priority from ranking data

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Message-ID: <20250218190822.1039982-12-superm1@kernel.org>
Date: Tue, 18 Feb 2025 13:08:20 -0600
From: Mario Limonciello <superm1@...nel.org>
To: Hans de Goede <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Mario Limonciello <mario.limonciello@....com>,
	Perry Yuan <perry.yuan@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	"H . Peter Anvin" <hpa@...or.com>,
	Jonathan Corbet <corbet@....net>,
	Huang Rui <ray.huang@....com>,
	"Gautham R . Shenoy" <gautham.shenoy@....com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	platform-driver-x86@...r.kernel.org (open list:AMD HETERO CORE HARDWARE FEEDBACK DRIVER),
	linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	linux-doc@...r.kernel.org (open list:DOCUMENTATION),
	linux-pm@...r.kernel.org (open list:AMD PSTATE DRIVER)
Subject: [PATCH v8 11/13] platform/x86/amd: hfi: Set ITMT priority from ranking data

From: Mario Limonciello <mario.limonciello@....com>

The static ranking data that is read at module load should be used
to set up the priorities for the cores relative to the performance
values.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@....com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/platform/x86/amd/hfi/Kconfig |  1 +
 drivers/platform/x86/amd/hfi/hfi.c   | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/platform/x86/amd/hfi/Kconfig b/drivers/platform/x86/amd/hfi/Kconfig
index 532939eb08a6a..045f598f4866c 100644
--- a/drivers/platform/x86/amd/hfi/Kconfig
+++ b/drivers/platform/x86/amd/hfi/Kconfig
@@ -7,6 +7,7 @@ config AMD_HFI
 	bool "AMD Hetero Core Hardware Feedback Driver"
 	depends on ACPI
 	depends on CPU_SUP_AMD
+	depends on SCHED_MC_PRIO
 	help
 	 Select this option to enable the AMD Heterogeneous Core Hardware
 	 Feedback Interface. If selected, hardware provides runtime thread
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index ad93c3b5d5ddf..14378a0e09e21 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -115,6 +115,12 @@ static DEFINE_PER_CPU(struct amd_hfi_cpuinfo, amd_hfi_cpuinfo) = {.class_index =
 
 static DEFINE_MUTEX(hfi_cpuinfo_lock);
 
+static void amd_hfi_sched_itmt_work(struct work_struct *work)
+{
+	sched_set_itmt_support();
+}
+static DECLARE_WORK(sched_amd_hfi_itmt_work, amd_hfi_sched_itmt_work);
+
 static int find_cpu_index_by_apicid(unsigned int target_apicid)
 {
 	int cpu_index;
@@ -235,6 +241,8 @@ static int amd_set_hfi_ipcc_score(struct amd_hfi_cpuinfo *hfi_cpuinfo, int cpu)
 		WRITE_ONCE(hfi_cpuinfo->ipcc_scores[i],
 			   hfi_cpuinfo->amd_hfi_classes[i].perf);
 
+	sched_set_itmt_core_prio(hfi_cpuinfo->ipcc_scores[0], cpu);
+
 	return 0;
 }
 
@@ -458,6 +466,8 @@ static int amd_hfi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	schedule_work(&sched_amd_hfi_itmt_work);
+
 	return 0;
 }
 
-- 
2.43.0