[Intel-SIG] new CPU topology series - 4/4: x86/apic: Rework APIC registration #105

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quanxianwang wants to merge 109 commits into6.6-velinuxfrom

DMR-new-cpu-topo-6.6-PR4-withfixes

Commits on Dec 16, 2025

hwmon: (fam15h_power) Use topology_core_id()

KAGA-KOKO
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quanxianwang
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x86/cpu: Move cpu_core_id into topology info

KAGA-KOKO
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quanxianwang
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x86/cpu: Move cu_id into topology info

KAGA-KOKO
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quanxianwang
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x86/cpu: Remove pointless evaluation of x86_coreid_bits

KAGA-KOKO
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quanxianwang
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x86/cpu: Move logical package and die IDs into topology info

KAGA-KOKO
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quanxianwang
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x86/cpu: Move cpu_l[l2]c_id into topology info

KAGA-KOKO
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quanxianwang
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x86/apic: Use BAD_APICID consistently

KAGA-KOKO
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quanxianwang
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x86/apic: Use u32 for APIC IDs in global data

KAGA-KOKO
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quanxianwang
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x86/apic: Use u32 for check_apicid_used()

KAGA-KOKO
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quanxianwang
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x86/apic: Use u32 for cpu_present_to_apicid()

KAGA-KOKO
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quanxianwang
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x86/apic: Use u32 for phys_pkg_id()

KAGA-KOKO
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quanxianwang
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x86/apic: Use u32 for [gs]et_apic_id()

KAGA-KOKO
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quanxianwang
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x86/apic, x86/hyperv: Use u32 in hv_snp_boot_ap() too

Ingo Molnar
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quanxianwang
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x86/apic: Use u32 for wakeup_secondary_cpu[_64]()

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Cure the abuse of cpuinfo for persisting logical ids

KAGA-KOKO
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quanxianwang
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x86/cpu: Provide debug interface

KAGA-KOKO
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quanxianwang
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x86/cpu: Provide cpuid_read() et al.

KAGA-KOKO
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quanxianwang
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x86/cpuid: Include <linux/build_bug.h> in <asm/cpuid.h>

Ahmed S. Darwish
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quanxianwang
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x86/cpu: Provide cpu_init/parse_topology()

KAGA-KOKO
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quanxianwang
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x86/cpu: Add legacy topology parser

KAGA-KOKO
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quanxianwang
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x86/cpu: Use common topology code for Centaur and Zhaoxin

KAGA-KOKO
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quanxianwang
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x86/cpu: Move __max_die_per_package to common.c

KAGA-KOKO
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quanxianwang
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x86/cpu: Provide a sane leaf 0xb/0x1f parser

KAGA-KOKO
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x86/cpu: Use common topology code for Intel

KAGA-KOKO
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x86/topology/intel: Unlock CPUID before evaluating anything

KAGA-KOKO
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x86/cpu: Provide an AMD/HYGON specific topology parser

KAGA-KOKO
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x86/cpu/amd: Make the CPUID 0x80000008 parser correct

KAGA-KOKO
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x86/cpu/amd: Make the NODEID_MSR union actually work

KAGA-KOKO
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quanxianwang
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x86/cpu/amd: Move TOPOEXT enablement into the topology parser

KAGA-KOKO
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quanxianwang
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x86/topology/amd: Ensure that LLC ID is initialized

KAGA-KOKO
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x86/topology/amd: Evaluate SMT in CPUID leaf 0x8000001e only on family 0x17 and greater

KAGA-KOKO
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x86/smpboot: Teach it about topo.amd_node_id

KAGA-KOKO
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quanxianwang
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x86/cpu: Use common topology code for AMD

KAGA-KOKO
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quanxianwang
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x86/cpu: Use common topology code for HYGON

KAGA-KOKO
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x86/mm/numa: Use core domain size on AMD

KAGA-KOKO
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x86/cpu: Make topology_amd_node_id() use the actual node info

KAGA-KOKO
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quanxianwang
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x86/cpu: Remove topology.c

KAGA-KOKO
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quanxianwang
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x86/cpu: Remove x86_coreid_bits

KAGA-KOKO
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quanxianwang
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x86/apic: Remove unused phys_pkg_id() callback

KAGA-KOKO
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quanxianwang
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x86/xen/smp_pv: Remove cpudata fiddling

KAGA-KOKO
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quanxianwang
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x86/apic/uv: Remove the private leaf 0xb parser

KAGA-KOKO
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quanxianwang
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Commits on Jan 6, 2026

x86/cpu/topology: Use initial APIC ID from XTOPOLOGY leaf on AMD/HYGON

kudureranganath
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quanxianwang
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x86/cpu/topology: Make the APIC mismatch warnings complete

KAGA-KOKO
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quanxianwang
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x86/xen: return a sane initial apic id when running as PV guest

jgross1
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quanxianwang
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x86/platform/ce4100: Dont override x86_init.mpparse.setup_ioapic_ids

KAGA-KOKO
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quanxianwang
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x86/ioapic: Replace some more set bit nonsense

KAGA-KOKO
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quanxianwang
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x86/apic: Get rid of get_physical_broadcast()

KAGA-KOKO
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quanxianwang
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x86/ioapic: Make io_apic_get_unique_id() simpler

KAGA-KOKO
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quanxianwang
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x86/ioapic: Simplify setup_ioapic_ids_from_mpc_nocheck()

KAGA-KOKO
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x86/apic: Remove check_apicid_used() and ioapic_phys_id_map()

KAGA-KOKO
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quanxianwang
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x86/mpparse: Rename default_find_smp_config()

KAGA-KOKO
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quanxianwang
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x86/mpparse: Provide separate early/late callbacks

KAGA-KOKO
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quanxianwang
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x86/mpparse: Prepare for callback separation

KAGA-KOKO
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quanxianwang
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x86/dtb: Rename x86_dtb_init()

KAGA-KOKO
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quanxianwang
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x86/platform/ce4100: Prepare for separate mpparse callbacks

KAGA-KOKO
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quanxianwang
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x86/platform/intel-mid: Prepare for separate mpparse callbacks

KAGA-KOKO
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quanxianwang
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x86/jailhouse: Prepare for separate mpparse callbacks

KAGA-KOKO
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quanxianwang
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x86/xen/smp_pv: Prepare for separate mpparse callbacks

KAGA-KOKO
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quanxianwang
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x86/hyperv/vtl: Prepare for separate mpparse callbacks

KAGA-KOKO
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quanxianwang
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x86/mpparse: Switch to new init callbacks

KAGA-KOKO
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quanxianwang
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x86/mm/numa: Move early mptable evaluation into common code

KAGA-KOKO
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quanxianwang
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x86/mpparse: Remove the physid_t bitmap wrapper

KAGA-KOKO
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quanxianwang
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x86/apic: Remove the pointless writeback of boot_cpu_physical_apicid

KAGA-KOKO
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quanxianwang
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x86/apic: Remove yet another dubious callback

KAGA-KOKO
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quanxianwang
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x86/apic: Use a proper define for invalid ACPI CPU ID

KAGA-KOKO
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quanxianwang
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x86/of: Move the x86_flattree_get_config() call out of x86_dtb_init()

Saurabh Sengar
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quanxianwang
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x86/hyperv/vtl: Correct x86_init.mpparse.parse_smp_cfg assignment

Saurabh Sengar
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quanxianwang
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x86/of: Set the parse_smp_cfg for all the DeviceTree platforms by default

Saurabh Sengar
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quanxianwang
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Commits on Jan 8, 2026

x86/cpu/topology: Move registration out of APIC code

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Provide separate APIC registration functions

KAGA-KOKO
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quanxianwang
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x86/acpi: Use new APIC registration functions

KAGA-KOKO
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quanxianwang
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x86/jailhouse: Use new APIC registration function

KAGA-KOKO
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quanxianwang
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x86/of: Use new APIC registration functions

KAGA-KOKO
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quanxianwang
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x86/mpparse: Use new APIC registration function

KAGA-KOKO
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quanxianwang
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x86/acpi: Dont invoke topology_register_apic() for XEN PV

KAGA-KOKO
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quanxianwang
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x86/xen/smp_pv: Register fake APICs

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Confine topology information

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Simplify APIC registration

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Use a data structure for topology info

KAGA-KOKO
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quanxianwang
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x86/smpboot: Make error message actually useful

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Sanitize the APIC admission logic

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Rework possible CPU management

KAGA-KOKO
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quanxianwang
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x86/cpu: Detect real BSP on crash kernels

KAGA-KOKO
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quanxianwang
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x86/topology: Add a mechanism to track topology via APIC IDs

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Reject unknown APIC IDs on ACPI hotplug

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Assign hotpluggable CPUIDs during init

KAGA-KOKO
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quanxianwang
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x86/xen/smp_pv: Count number of vCPUs early

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Let XEN/PV use topology from CPUID/MADT

KAGA-KOKO
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Revert "bytedance: x86/tsc: Enhance watchdog check exemption for 4 sockets platform"
quanxianwang
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x86/cpu/topology: Use topology bitmaps for sizing

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Mop up primary thread mask handling

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Simplify cpu_mark_primary_thread()

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Provide logical pkg/die mapping

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Use topology logical mapping mechanism

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Retrieve cores per package from topology bitmaps

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Rename smp_num_siblings

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Rename topology_max_die_per_package()

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Provide __num_[cores|threads]_per_package

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Get rid of cpuinfo::x86_max_cores

KAGA-KOKO
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quanxianwang
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x86/topology: Ignore non-present APIC IDs in a present package

KAGA-KOKO
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quanxianwang
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x86/topology: Don't evaluate logical IDs during early boot

KAGA-KOKO
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quanxianwang
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x86/topology: Don't update cpu_possible_map in topo_set_cpuids()

KAGA-KOKO
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quanxianwang
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x86/xen/smp_pv: Register the boot CPU APIC properly

KAGA-KOKO
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quanxianwang
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x86/topology: Handle bogus ACPI tables correctly

KAGA-KOKO
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quanxianwang
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x86/cpu/topology: Remove limit of CPUs due to disabled IO/APIC

ffmancera
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quanxianwang
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x86/acpi: Don't limit CPUs to 1 for Xen PV guests due to disabled ACPI

arkamar
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quanxianwang
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x86/xen: mark boot CPU of PV guest in MSR_IA32_APICBASE

jgross1
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x86/topology: Handle the !APIC case gracefully

KAGA-KOKO
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quanxianwang
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x86/tsc: Use topology_max_packages() to get package number

ftang1
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quanxianwang
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