[PATCH v10 0/8] ACPI: Unify CPU UID interface and fix ARM64 TPH steer-tag issue

[Chengwen Feng <fengchengwen@xxxxxxxxxx>]

This patchset unifies ACPI Processor UID retrieval across
arm64/loongarch/riscv/x86 via acpi_get_cpu_uid() (with input validation)
and fixes ARM64 CPU steer-tag retrieval failure in PCI/TPH:

1-4: Add acpi_get_cpu_uid() for arm64/loongarch/riscv/x86 (update
     respective users)
5: Centralize acpi_get_cpu_uid() declaration in include/linux/acpi.h
6: Clean up perf/arm_cspmu
7: Clean up ACPI/PPTT and remove unused get_acpi_id_for_cpu()
8: Pass ACPI Processor UID to Cache Locality _DSM

The interface refactor ensures consistent CPU UID retrieval across
architectures (no functional changes for valid inputs) and provides the
unified interface required for the ARM64 TPH fix.

---
Changes in v10:
- Refine commit header&log according to Punit's and Bjorn's review
- Split perf/arm_cspmu as a separate commit which address Punit's
  review

Changes in v9:
- Address Bjorn's review: split commits to each platform so that make
  them easy to review

Changes in v8:
- Moving arm64's get_cpu_for_acpi_id() to kernel/acpi.c which address
  Jeremy's review

Chengwen Feng (8):
  arm64: acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  RISC-V: ACPI: Add acpi_get_cpu_uid() for unified ACPI CPU UID
    retrieval
  x86/acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  ACPI: Centralize acpi_get_cpu_uid() declaration in
    include/linux/acpi.h
  perf: arm_cspmu: Switch to acpi_get_cpu_uid() from
    get_acpi_id_for_cpu()
  ACPI: PPTT: Use acpi_get_cpu_uid() and remove get_acpi_id_for_cpu()
  PCI/TPH: Pass ACPI Processor UID to Cache Locality _DSM

 Documentation/PCI/tph.rst          |  4 +--
 arch/arm64/include/asm/acpi.h      | 17 +---------
 arch/arm64/kernel/acpi.c           | 30 ++++++++++++++++++
 arch/loongarch/include/asm/acpi.h  |  5 ---
 arch/loongarch/kernel/acpi.c       |  9 ++++++
 arch/riscv/include/asm/acpi.h      |  4 ---
 arch/riscv/kernel/acpi.c           | 16 ++++++++++
 arch/riscv/kernel/acpi_numa.c      |  9 ++++--
 arch/x86/include/asm/cpu.h         |  1 -
 arch/x86/include/asm/smp.h         |  1 -
 arch/x86/kernel/acpi/boot.c        | 20 ++++++++++++
 arch/x86/xen/enlighten_hvm.c       |  5 +--
 drivers/acpi/pptt.c                | 50 ++++++++++++++++++++++--------
 drivers/acpi/riscv/rhct.c          |  7 ++++-
 drivers/pci/tph.c                  | 16 +++++++---
 drivers/perf/arm_cspmu/arm_cspmu.c |  6 ++--
 include/linux/acpi.h               | 11 +++++++
 include/linux/pci-tph.h            |  4 +--
 18 files changed, 158 insertions(+), 57 deletions(-)

-- 
2.17.1