From 6ee98aabdc700b5705e4f1833e2edc82a826b53b Mon Sep 17 00:00:00 2001 From: Xiaochen Shen Date: Tue, 9 Dec 2025 14:26:49 +0800 Subject: [PATCH] x86/resctrl: Add missing resctrl initialization for Hygon Hygon CPUs supporting Platform QoS features currently undergo partial resctrl initialization through resctrl_cpu_detect() in the Hygon BSP init helper and AMD/Hygon common initialization code. However, several critical data structures remain uninitialized for Hygon CPUs in the following paths: - get_mem_config()-> __rdt_get_mem_config_amd(): rdt_resource::membw,alloc_capable hw_res::num_closid - rdt_init_res_defs()->rdt_init_res_defs_amd(): rdt_resource::cache hw_res::msr_base,msr_update Add the missing AMD/Hygon common initialization to ensure proper Platform QoS functionality on Hygon CPUs. Fixes: d8df126349da ("x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper") Signed-off-by: Xiaochen Shen Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Reinette Chatre Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20251209062650.1536952-2-shenxiaochen@open-hieco.net --- arch/x86/kernel/cpu/resctrl/core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 3792ab4819dc6..10de1594d328f 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -825,7 +825,8 @@ static __init bool get_mem_config(void) if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) return __get_mem_config_intel(&hw_res->r_resctrl); - else if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + else if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) return __rdt_get_mem_config_amd(&hw_res->r_resctrl); return false; @@ -987,7 +988,8 @@ static __init void rdt_init_res_defs(void) { if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) rdt_init_res_defs_intel(); - else if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + else if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) rdt_init_res_defs_amd(); } -- 2.47.3