Some cleanups and reorg of paravirt code and headers:

- The first 2 patches should be not controversial at all, as they
  remove just some no longer needed #include and struct forward
  declarations.

- The 3rd patch is removing CONFIG_PARAVIRT_DEBUG, which IMO has
  no real value, as it just changes a crash to a BUG() (the stack
  trace will basically be the same). As the maintainer of the main
  paravirt user (Xen) I have never seen this crash/BUG() to happen.

- The 4th patch is just a movement of code.

- I don't know for what reason asm/paravirt_api_clock.h was added,
  as all archs supporting it do it exactly in the same way. Patch
  5 is removing it.

- Patches 6-14 are streamlining the paravirt clock interfaces by
  using a common implementation across architectures where possible
  and by moving the related code into common sched code, as this is
  where it should live.

- Patches 15-20 are more like RFC material preparing the paravirt
  infrastructure to support multiple pv_ops function arrays.
  As a prerequisite for that it makes life in objtool much easier
  with dropping the Xen static initializers of the pv_ops sub-
  structures, which is done in patches 15-17.
  Patches 18-20 are doing the real preparations for multiple pv_ops
  arrays and using those arrays in multiple headers.

- Patch 21 is an example how the new scheme can look like using the
  PV-spinlocks.

Changes in V2:
- new patches 13-18 and 20
- complete rework of patch 21

Changes in V3:
- fixed 2 issues detected by kernel test robot

Changes in V4:
- fixed one build issue

Changes in V5:
- fixed another build issue
- rebase

Juergen Gross (21):
  x86/paravirt: Remove not needed includes of paravirt.h
  x86/paravirt: Remove some unneeded struct declarations
  x86/paravirt: Remove PARAVIRT_DEBUG config option
  x86/paravirt: Move thunk macros to paravirt_types.h
  paravirt: Remove asm/paravirt_api_clock.h
  sched: Move clock related paravirt code to kernel/sched
  arm/paravirt: Use common code for paravirt_steal_clock()
  arm64/paravirt: Use common code for paravirt_steal_clock()
  loongarch/paravirt: Use common code for paravirt_steal_clock()
  riscv/paravirt: Use common code for paravirt_steal_clock()
  x86/paravirt: Use common code for paravirt_steal_clock()
  x86/paravirt: Move paravirt_sched_clock() related code into tsc.c
  x86/paravirt: Introduce new paravirt-base.h header
  x86/paravirt: Move pv_native_*() prototypes to paravirt.c
  x86/xen: Drop xen_irq_ops
  x86/xen: Drop xen_cpu_ops
  x86/xen: Drop xen_mmu_ops
  objtool: Allow multiple pv_ops arrays
  x86/paravirt: Allow pv-calls outside paravirt.h
  x86/paravirt: Specify pv_ops array in paravirt macros
  x86/pvlocks: Move paravirt spinlock functions into own header

 arch/Kconfig                                  |   3 +
 arch/arm/Kconfig                              |   1 +
 arch/arm/include/asm/paravirt.h               |  22 --
 arch/arm/include/asm/paravirt_api_clock.h     |   1 -
 arch/arm/kernel/Makefile                      |   1 -
 arch/arm/kernel/paravirt.c                    |  23 --
 arch/arm64/Kconfig                            |   1 +
 arch/arm64/include/asm/paravirt.h             |  14 -
 arch/arm64/include/asm/paravirt_api_clock.h   |   1 -
 arch/arm64/kernel/paravirt.c                  |  11 +-
 arch/loongarch/Kconfig                        |   1 +
 arch/loongarch/include/asm/paravirt.h         |  13 -
 .../include/asm/paravirt_api_clock.h          |   1 -
 arch/loongarch/kernel/paravirt.c              |  10 +-
 arch/powerpc/include/asm/paravirt.h           |   3 -
 arch/powerpc/include/asm/paravirt_api_clock.h |   2 -
 arch/powerpc/platforms/pseries/setup.c        |   4 +-
 arch/riscv/Kconfig                            |   1 +
 arch/riscv/include/asm/paravirt.h             |  14 -
 arch/riscv/include/asm/paravirt_api_clock.h   |   1 -
 arch/riscv/kernel/paravirt.c                  |  11 +-
 arch/x86/Kconfig                              |   8 +-
 arch/x86/entry/entry_64.S                     |   1 -
 arch/x86/entry/vsyscall/vsyscall_64.c         |   1 -
 arch/x86/hyperv/hv_spinlock.c                 |  11 +-
 arch/x86/include/asm/apic.h                   |   4 -
 arch/x86/include/asm/highmem.h                |   1 -
 arch/x86/include/asm/mshyperv.h               |   1 -
 arch/x86/include/asm/paravirt-base.h          |  35 ++
 arch/x86/include/asm/paravirt-spinlock.h      | 145 ++++++++
 arch/x86/include/asm/paravirt.h               | 331 +++++-------------
 arch/x86/include/asm/paravirt_api_clock.h     |   1 -
 arch/x86/include/asm/paravirt_types.h         | 269 +++++++-------
 arch/x86/include/asm/pgtable_32.h             |   1 -
 arch/x86/include/asm/ptrace.h                 |   2 +-
 arch/x86/include/asm/qspinlock.h              |  87 +----
 arch/x86/include/asm/spinlock.h               |   1 -
 arch/x86/include/asm/timer.h                  |   1 +
 arch/x86/include/asm/tlbflush.h               |   4 -
 arch/x86/kernel/Makefile                      |   2 +-
 arch/x86/kernel/apm_32.c                      |   1 -
 arch/x86/kernel/callthunks.c                  |   1 -
 arch/x86/kernel/cpu/bugs.c                    |   1 -
 arch/x86/kernel/cpu/vmware.c                  |   1 +
 arch/x86/kernel/kvm.c                         |  13 +-
 arch/x86/kernel/kvmclock.c                    |   1 +
 arch/x86/kernel/paravirt-spinlocks.c          |  26 +-
 arch/x86/kernel/paravirt.c                    |  42 +--
 arch/x86/kernel/tsc.c                         |  10 +-
 arch/x86/kernel/vsmp_64.c                     |   1 -
 arch/x86/lib/cache-smp.c                      |   1 -
 arch/x86/mm/init.c                            |   1 -
 arch/x86/xen/enlighten_pv.c                   |  82 ++---
 arch/x86/xen/irq.c                            |  20 +-
 arch/x86/xen/mmu_pv.c                         | 100 ++----
 arch/x86/xen/spinlock.c                       |  11 +-
 arch/x86/xen/time.c                           |   2 +
 drivers/clocksource/hyperv_timer.c            |   2 +
 drivers/xen/time.c                            |   2 +-
 include/linux/sched/cputime.h                 |  18 +
 kernel/sched/core.c                           |   5 +
 kernel/sched/cputime.c                        |  13 +
 kernel/sched/sched.h                          |   3 +-
 tools/objtool/arch/x86/decode.c               |   8 +-
 tools/objtool/check.c                         |  78 ++++-
 tools/objtool/include/objtool/check.h         |   1 +
 66 files changed, 662 insertions(+), 827 deletions(-)
 delete mode 100644 arch/arm/include/asm/paravirt.h
 delete mode 100644 arch/arm/include/asm/paravirt_api_clock.h
 delete mode 100644 arch/arm/kernel/paravirt.c
 delete mode 100644 arch/arm64/include/asm/paravirt_api_clock.h
 delete mode 100644 arch/loongarch/include/asm/paravirt_api_clock.h
 delete mode 100644 arch/powerpc/include/asm/paravirt_api_clock.h
 delete mode 100644 arch/riscv/include/asm/paravirt_api_clock.h
 create mode 100644 arch/x86/include/asm/paravirt-base.h
 create mode 100644 arch/x86/include/asm/paravirt-spinlock.h
 delete mode 100644 arch/x86/include/asm/paravirt_api_clock.h

-- 
2.51.0

Hello:

This series was applied to riscv/linux.git (fixes)
by Borislav Petkov (AMD) <bp@alien8.de>:

On Mon,  5 Jan 2026 12:04:59 +0100 you wrote:
> Some cleanups and reorg of paravirt code and headers:
> 
> - The first 2 patches should be not controversial at all, as they
>   remove just some no longer needed #include and struct forward
>   declarations.
> 
> - The 3rd patch is removing CONFIG_PARAVIRT_DEBUG, which IMO has
>   no real value, as it just changes a crash to a BUG() (the stack
>   trace will basically be the same). As the maintainer of the main
>   paravirt user (Xen) I have never seen this crash/BUG() to happen.
> 
> [...]

Here is the summary with links:
  - [v5,05/21] paravirt: Remove asm/paravirt_api_clock.h
    https://git.kernel.org/riscv/c/68b10fd40d49
  - [v5,06/21] sched: Move clock related paravirt code to kernel/sched
    https://git.kernel.org/riscv/c/e6b2aa6d4004
  - [v5,10/21] riscv/paravirt: Use common code for paravirt_steal_clock()
    https://git.kernel.org/riscv/c/ee9ffcf99f07

You are awesome, thank you!
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