linux-kernel - [PATCH v3 13/14] platform/x86/amd: hfi: Set ITMT priority from ranking data

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Message-ID: <20241015213645.1476-14-mario.limonciello@amd.com>
Date: Tue, 15 Oct 2024 16:36:44 -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 v3 13/14] platform/x86/amd: hfi: Set ITMT priority from ranking data

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.

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 08051cd4f74d..4dfa7641b35b 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 classification guidance to the operating system
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index 79963c423d35..6c90b50f0a40 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -120,6 +120,12 @@ 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;
@@ -246,6 +252,8 @@ 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;
 }
 
@@ -463,6 +471,8 @@ 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