From b6ffe4d9e074561f95a728e1f822ed15e533ec6e Mon Sep 17 00:00:00 2001 From: Perry Yuan Date: Mon, 9 Jun 2025 15:05:11 -0500 Subject: [PATCH] platform/x86: hfi: Init per-cpu scores for each class MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Initialize per CPU score `amd_hfi_ipcc_scores` which store energy score and performance score data for each class. Classic and dense cores are ranked according to those values as energy efficiency capability or performance capability. OS scheduler will pick cores from the ranking list on each class ID for the thread which provide the class id got from hardware feedback interface. Signed-off-by: Perry Yuan Co-developed-by: Mario Limonciello Signed-off-by: Mario Limonciello Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Gautham R. Shenoy Acked-by: Ilpo Järvinen Link: https://lore.kernel.org/20250609200518.3616080-7-superm1@kernel.org --- drivers/platform/x86/amd/hfi/hfi.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c index 690b7b1b9943..b10bd96c5920 100644 --- a/drivers/platform/x86/amd/hfi/hfi.c +++ b/drivers/platform/x86/amd/hfi/hfi.c @@ -228,6 +228,31 @@ static int amd_hfi_alloc_class_data(struct platform_device *pdev) return 0; } +static int amd_set_hfi_ipcc_score(struct amd_hfi_cpuinfo *hfi_cpuinfo, int cpu) +{ + for (int i = 0; i < hfi_cpuinfo->nr_class; i++) + WRITE_ONCE(hfi_cpuinfo->ipcc_scores[i], + hfi_cpuinfo->amd_hfi_classes[i].perf); + + return 0; +} + +static int update_hfi_ipcc_scores(void) +{ + int cpu; + int ret; + + for_each_possible_cpu(cpu) { + struct amd_hfi_cpuinfo *hfi_cpuinfo = per_cpu_ptr(&amd_hfi_cpuinfo, cpu); + + ret = amd_set_hfi_ipcc_score(hfi_cpuinfo, cpu); + if (ret) + return ret; + } + + return 0; +} + static int amd_hfi_metadata_parser(struct platform_device *pdev, struct amd_hfi_data *amd_hfi_data) { @@ -310,6 +335,10 @@ static int amd_hfi_probe(struct platform_device *pdev) if (ret) return ret; + ret = update_hfi_ipcc_scores(); + if (ret) + return ret; + return 0; } -- 2.47.2