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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Zdmt1PfrJ9d7zfQ764mxKrV9P6LH9hFk4mZ/q0mKx8di4g1mMd/FS4Dyu8JzOlQKyfTO8TZWfxKVUsFbiry2sWtfjrRkLVBccNQ6lKDzek+FRlAlnec3YzNpaFj/AfQS9HLZvLViGL4mMQDdKiERY0hNt/20BznH6I2skh6EuHhwTmKqxQwzwIzD4olYO5e23UNixIv+bs9Qrb7V2PcTlOemlpXvvpokCLyYky0tZKjGd2IWSRv7mDGQqcrvYhY5i1ApRiigyTgkg1Q+AG+SXa7bRAp6RdPvEBMj0rr3FmUu/XHLQGegQNnmEh2CzbNizGFzbylFLCoEJsXiqNKzthN8vF72XW8J7D5q2Kd00YfUOiP9BPwKjFbAhw0ZfPqILcQUwFIum0enGafQSz7RtNl3VzoGLYWuGRwEqE1R94OqE+lz9jjdxTT1rjNlYJZW X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Apr 2026 23:25:21.9035 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9c8c91b3-1574-429d-a6f0-08dea70fbfef 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: SA2PEPF0000150A.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6223 Privilege Level Zero Association (PLZA) is configured per logical processor via MSR_IA32_PQR_PLZA_ASSOC (0xc00003fc). Software must program RMID and CLOSID association fields and their enable bits using the layout defined for the MSR. Define MSR_IA32_PQR_PLZA_ASSOC and the RMID_EN, CLOSID_EN, and PLZA_EN bit masks in asm/msr-index.h. Add union msr_pqr_plza_assoc in arch resctrl internal.h Signed-off-by: Babu Moger --- v3: No code changes. Patch order cahnged. Improved changelog. v2: No changes. Just rebasing on top of the latest tip branch. --- arch/x86/include/asm/msr-index.h | 7 +++++++ arch/x86/kernel/cpu/resctrl/internal.h | 27 ++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 9dc6b610e4e2..623628d3c643 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -1287,10 +1287,17 @@ /* - AMD: */ #define MSR_IA32_MBA_BW_BASE 0xc0000200 #define MSR_IA32_SMBA_BW_BASE 0xc0000280 +#define MSR_IA32_PQR_PLZA_ASSOC 0xc00003fc #define MSR_IA32_L3_QOS_ABMC_CFG 0xc00003fd #define MSR_IA32_L3_QOS_EXT_CFG 0xc00003ff #define MSR_IA32_EVT_CFG_BASE 0xc0000400 +/* Lower 32 bits of MSR_IA32_PQR_PLZA_ASSOC */ +#define RMID_EN BIT(31) +/* Upper 32 bits of MSR_IA32_PQR_PLZA_ASSOC */ +#define CLOSID_EN BIT(15) +#define PLZA_EN BIT(31) + /* AMD-V MSRs */ #define MSR_VM_CR 0xc0010114 #define MSR_VM_IGNNE 0xc0010115 diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index e3cfa0c10e92..1c2f87ffb0ea 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -222,6 +222,33 @@ union l3_qos_abmc_cfg { unsigned long full; }; +/* + * PLZA is programmed by writing to MSR_IA32_PQR_PLZA_ASSOC. Bitfield + * layout for MSR_IA32_PQR_PLZA_ASSOC (Privilege Level Zero Association). + * + * @rmid : The RMID to be configured for PLZA. + * @reserved1 : Reserved. + * @rmid_en : Associate RMID or not. + * @closid : The CLOSID to be configured for PLZA. + * @reserved2 : Reserved. + * @closid_en : Associate CLOSID or not. + * @reserved3 : Reserved. + * @plza_en : Configure PLZA or not. + */ +union msr_pqr_plza_assoc { + struct { + unsigned long rmid :12, + reserved1 :19, + rmid_en : 1, + closid : 4, + reserved2 :11, + closid_en : 1, + reserved3 :15, + plza_en : 1; + } split; + unsigned long full; +}; + void rdt_ctrl_update(void *arg); int rdt_get_l3_mon_config(struct rdt_resource *r); -- 2.43.0