[PATCH v2 0/6] riscv: Make IPI_MAX visible and use it consistently

[Guo Ren <guoren@kernel.org>]

This series removes the implicit assumption that RISC-V supports exactly
eight IPI message types.

Currently, the SBI, CLINT and ACLINT SSWI IPI providers use
BITS_PER_BYTE when sizing the generic IPI mux, while IMSIC carries a
separate IMSIC_NR_IPI definition set to 8. These values happen to match
IPI_MAX today, but neither is the proper source of truth for the number
of RISC-V IPI message types.

Move enum ipi_message_type to asm/smp.h so IPI providers can use IPI_MAX
directly, then replace the BITS_PER_BYTE and IMSIC_NR_IPI uses with
IPI_MAX.

This also makes adding future RISC-V IPI message types independent of
the current eight-entry assumption.

A follow-up patch renames the MediaTek VPU mailbox terminator from
IPI_MAX to IPI_VPU_MAX. That token belongs to the VPU firmware IPI id
enum and should follow the same prefixed convention as IPI_VPU_INIT
(and SCP_IPI_MAX on the SCP side), instead of reusing the generic
IPI_MAX name.

---
GUO Ren (XuanTie) (4):
      clocksource: clint: Use IPI_MAX for IPI muxing
      irqchip/aclint-sswi: Use IPI_MAX for IPI muxing
      irqchip/imsic: Use IPI_MAX instead of IMSIC_NR_IPI
      media: mtk-vpu: rename IPI_MAX to IPI_VPU_MAX

tip-bot2 for GUO Ren (XuanTie) (2):
      riscv: smp: Move enum ipi_message_type to asm/smp.h
      riscv: sbi: Use IPI_MAX for SBI IPI muxing

 arch/riscv/include/asm/smp.h                  | 12 ++++++++++++
 arch/riscv/kernel/sbi-ipi.c                   |  4 ++--
 arch/riscv/kernel/smp.c                       | 12 ------------
 drivers/clocksource/timer-clint.c             |  4 ++--
 drivers/irqchip/irq-aclint-sswi.c             |  4 ++--
 drivers/irqchip/irq-riscv-imsic-early.c       |  4 ++--
 drivers/irqchip/irq-riscv-imsic-state.h       |  1 -
 drivers/media/platform/mediatek/vpu/mtk_vpu.c | 12 ++++++------
 drivers/media/platform/mediatek/vpu/mtk_vpu.h |  4 ++--
 9 files changed, 28 insertions(+), 29 deletions(-)
---
base-commit: 08df884136f1c1197bab2a27814404fd329d9aac
change-id: 20260911-ipi_max-ff71eeadf6fd

Best regards,
--  
GUO Ren (XuanTie) <guoren@kernel.org>