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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: xq0X8/W/3CyoB8Y8yc7qqjT6L0keV1Df911zvISdthgV6LnD+i7R9XtZ5TEhDZJBtyGP0tZvx8Pn3JzXNC+/6gHDw2v4jtymE52WxR9QI64aDJQe2X5c0bF8dtvKlARiGyYhv8RKb0lsaTL4iZxjn3EQvv3kqD2LcU4SSQJt160Rh535tK6aZ7oKF6wN/DJSHQ2EnNoiPNipWdcHfSLUOC+miLbGIC0l5bf+g0ReFkFADPVXDKHPecEwkzcEjNvSqQWoai+3gdChnQRV3hCNxd33+esFTKBAOXrdQUNQfB29uCjroh3lHMFZ8le+5Y7MWmn34n50Kd1I15Me8jvM5ACgDb8kZYpxaFOElgEZRaydZ2ZvsThqbr87TupfP7b1dNAI4C0vGRp2SYXRrhW1AhH9rEITK/WJ5dztbVK0OjijTrYAremmLqEs/vIWZ5kb X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jun 2026 09:45:10.5671 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 17b164ea-0249-4089-854e-08ded5c31c76 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: CH2PEPF0000009D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6309 Replace the bare 0/1 in get_topology_cpu_type() with named constants that mirror what the AMD APM publishes for CPUID Fn0x80000026 EBX[31:28] (Extended CPU Topology, Core Type): 0 - Performance core 1 - Efficient core 2 - Low-power core (used by a follow-up) No functional change. Suggested-by: Borislav Petkov (AMD) Signed-off-by: Vishal Badole --- arch/x86/include/asm/topology.h | 6 ++++++ arch/x86/kernel/cpu/topology_common.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 0ba9bdb99871..9658b5676ce6 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -120,6 +120,12 @@ enum x86_topology_cpu_type { TOPO_CPU_TYPE_UNKNOWN, }; +enum amd_cpu_type { + AMD_CPU_TYPE_PERFORMANCE = 0, + AMD_CPU_TYPE_EFFICIENCY = 1, + AMD_CPU_TYPE_LOW_POWER = 2, +}; + struct x86_topology_system { unsigned int dom_shifts[TOPO_MAX_DOMAIN]; unsigned int dom_size[TOPO_MAX_DOMAIN]; diff --git a/arch/x86/kernel/cpu/topology_common.c b/arch/x86/kernel/cpu/topology_common.c index cf7513416b70..e1cc25a115ca 100644 --- a/arch/x86/kernel/cpu/topology_common.c +++ b/arch/x86/kernel/cpu/topology_common.c @@ -42,8 +42,8 @@ enum x86_topology_cpu_type get_topology_cpu_type(struct cpuinfo_x86 *c) } if (c->x86_vendor == X86_VENDOR_AMD) { switch (c->topo.amd_type) { - case 0: return TOPO_CPU_TYPE_PERFORMANCE; - case 1: return TOPO_CPU_TYPE_EFFICIENCY; + case AMD_CPU_TYPE_PERFORMANCE: return TOPO_CPU_TYPE_PERFORMANCE; + case AMD_CPU_TYPE_EFFICIENCY: return TOPO_CPU_TYPE_EFFICIENCY; } } -- 2.34.1