[PATCH v2 0/2] iommu/riscv: Support Svpbmt memory types in generic_pt

[fangyu . yu]

From: Fangyu Yu <fangyu.yu@xxxxxxxxxxxxxxxxx>

RISC-V Svpbmt adds page-based memory types (PBMT) to PTEs, allowing
mappings to be tagged as e.g. normal memory, non-cacheable memory, or
I/O.

This series wires the RISC-V IOMMU Svpbmt capability into generic_pt
and uses PBMT to encode device memory attributes for IOMMU mappings.

This series builds on top of the new RISC-V IOMMU page table patches:
https://patch.msgid.link/r/0-v3-9dbf0a72a51c+302-iommu_pt_riscv_jgg@xxxxxxxxxx

---
Changes in v2:
    - Add a comment for PT_FEAT_RISCV_SVPBMT (per Kevin and Jason).
    - Clarify PBMT encoding condition, sort PBMT-related bits by
      position, and drop the redundant PBMT clear(per Kevin).
    - Link to v1:
      https://lore.kernel.org/linux-iommu/20260411022223.91029-1-fangyu.yu@xxxxxxxxxxxxxxxxx/

Fangyu Yu (2):
  iommu/riscv: Advertise Svpbmt support to generic page table
  iommupt: Encode IOMMU_MMIO/IOMMU_CACHE via RISC-V Svpbmt bits

 drivers/iommu/generic_pt/fmt/riscv.h | 8 ++++++++
 drivers/iommu/riscv/iommu.c          | 2 ++
 include/linux/generic_pt/common.h    | 4 ++++
 3 files changed, 14 insertions(+)

-- 
2.50.1