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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 555sIBLsmocCw8iS22a+9g8CUP5+DFa3RHaOk75NwO8BkrlYwJYVnShRlo3xln3OJEJRxVW2QDB8VcCgDuvD1pwVe0xmv6fgjZxcCKZSvTS4NFcKiv2hlue/Z76L3uFpb8Jry+jLL60X/6DeSPiaudCSSkIxTZ2f4MCXOUISCfhQyATW+s6t4bb4r5aS022YZpvfF/aq/iTR+GM5h4YH8cDYlzNVDjX1Df95uD9q77/7fkvhBO/f/bjT9FTu6SofzJDPkddFtzISHfoYJKrVPe8D7125mEz/kGg4bOziPEBd2CljNNv2OkrDzqNCa2h3HnkDs9v32uDWAn0GCL/86Ye+y8Zioq2i/+Uk5q63KGzciBt4j4Lft6y1cRqv+f68nzOPqYNo/z+6vbfco9JlGaWZ3eqyOSxg4oKvnTcLyTHma5s6CZwfH/p0VSFr0fTT X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jul 2026 21:51:43.4912 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a879a4e4-5bcf-40f5-8fab-08dedc71ef2d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000F0E3.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8102 Generic resctrl exposes kernel-mode policy options via sysfs only after architectures indicate the set of supported policies using resctrl_set_kmode_support(). On AMD systems, Privilege Level Zero Association (PLZA) provides two global assignment modes: - GLOBAL_ASSIGN_CTRL_INHERIT_MON_PER_CPU: Assigns the resource allocation for kernel work; but monitoring is inherited from the user task. - GLOBAL_ASSIGN_CTRL_ASSIGN_MON_PER_CPU: Assigns a dedicated resource allocation and monitoring for kernel work. Expose these modes during resource discovery when PLZA is available. Signed-off-by: Babu Moger --- v4: New patch to set the supported features during arch init. --- arch/x86/kernel/cpu/resctrl/core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 27e09cded829..df7e19fe6007 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -962,6 +962,9 @@ static __init bool get_rdt_alloc_resources(void) if (get_slow_mem_config()) ret = true; + if (ret && rdt_cpu_has(X86_FEATURE_PLZA)) + resctrl_set_kmode_support(GLOBAL_ASSIGN_CTRL_INHERIT_MON_PER_CPU); + return ret; } @@ -988,6 +991,9 @@ static __init bool get_rdt_mon_resources(void) if (!ret) return false; + if (rdt_cpu_has(X86_FEATURE_PLZA)) + resctrl_set_kmode_support(GLOBAL_ASSIGN_CTRL_ASSIGN_MON_PER_CPU); + return !rdt_get_l3_mon_config(r); } -- 2.43.0