linux-kernel - [tip: x86/platform] platform/x86/amd: hfi: Set ITMT priority from ranking data

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <175196903404.406.4067289694319476043.tip-bot2@tip-bot2>
Date: Tue, 08 Jul 2025 10:03:54 -0000
From: "tip-bot2 for Mario Limonciello" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Mario Limonciello <mario.limonciello@....com>,
 "Borislav Petkov (AMD)" <bp@...en8.de>,
 "Gautham R. Shenoy" <gautham.shenoy@....com>, ilpo.jarvinen@...ux.intel.com,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/platform] platform/x86/amd: hfi: Set ITMT priority from
 ranking data

The following commit has been merged into the x86/platform branch of tip:

Commit-ID:     216fe0d7680b2503e09edd1d7dca73305806591c
Gitweb:        https://git.kernel.org/tip/216fe0d7680b2503e09edd1d7dca73305806591c
Author:        Mario Limonciello <mario.limonciello@....com>
AuthorDate:    Mon, 09 Jun 2025 15:05:16 -05:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Mon, 07 Jul 2025 22:34:17 +02:00

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>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@....com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Link: https://lore.kernel.org/20250609200518.3616080-12-superm1@kernel.org
---
 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 0196380..fecef68 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 b0a5840..805c03b 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -114,6 +114,12 @@ 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;
@@ -238,6 +244,8 @@ 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;
 }
 
@@ -459,6 +467,8 @@ static int amd_hfi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	schedule_work(&sched_amd_hfi_itmt_work);
+
 	return 0;
 }