In this patch series are introduced necessary functions to build and manage
RISC-V guest page tables and MMIO/RAM mappings.

CI tests:
  https://gitlab.com/xen-project/people/olkur/xen/-/pipelines/1862284573

---
Changes in V2:
 - Merged to staging:
   - [PATCH v1 1/6] xen/riscv: add inclusion of xen/bitops.h to asm/cmpxchg.h
 - New patches:
   - xen/riscv: implement sbi_remote_hfence_gvma{_vmid}().
 - Split patch "xen/riscv: implement p2m mapping functionality" into smaller
   one patches:
   - xen/riscv: introduce page_set_xenheap_gfn()
   - xen/riscv: implement guest_physmap_add_entry() for mapping GFNs to MFNs
   - xen/riscv: implement p2m_set_entry() and __p2m_set_entry()
   - xen/riscv: Implement p2m_free_entry() and related helpers
   - xen/riscv: Implement superpage splitting for p2m mappings
   - xen/riscv: implement p2m_next_level()
   - xen/riscv: Implement p2m_entry_from_mfn() and support PBMT configuration
 - Move root p2m table allocation to separate patch:
   xen/riscv: add root page table allocation
 - Drop dependency of this patch series from the patch witn an introduction of
   SvPBMT as it was merged.
 - Patch "[PATCH v1 4/6] xen/riscv: define pt_t and pt_walk_t structures" was
   renamed to xen/riscv: introduce pte_{set,get}_mfn() as after dropping of
   bitfields for PTE structure, this patch introduce only pte_{set,get}_mfn().
 - Rename "xen/riscv: define pt_t and pt_walk_t structures" to
   "xen/riscv: introduce pte_{set,get}_mfn()" as pt_t and pt_walk_t were
   dropped.
 - Introduce guest domain's VMID allocation and manegement.
 - Add patches necessary to implement p2m lookup:
   - xen/riscv: implement mfn_valid() and page reference, ownership handling helpers
   - xen/riscv: add support of page lookup by GFN
 - Re-sort patch series.
 - Add link to CI tests.
 - All other changes are patch-specific. Please check them.
---

Oleksii Kurochko (17):
  xen/riscv: implement sbi_remote_hfence_gvma()
  xen/riscv: introduce sbi_remote_hfence_gvma_vmid()
  xen/riscv: introduce guest domain's VMID allocation and manegement
  xen/riscv: construct the P2M pages pool for guests
  xen/riscv: introduce things necessary for p2m initialization
  xen/riscv: add root page table allocation
  xen/riscv: introduce pte_{set,get}_mfn()
  xen/riscv: add new p2m types and helper macros for type classification
  xen/riscv: introduce page_set_xenheap_gfn()
  xen/riscv: implement guest_physmap_add_entry() for mapping GFNs to
    MFNs
  xen/riscv: implement p2m_set_entry() and __p2m_set_entry()
  xen/riscv: Implement p2m_free_entry() and related helpers
  xen/riscv: Implement p2m_entry_from_mfn() and support PBMT
    configuration
  xen/riscv: implement p2m_next_level()
  xen/riscv: Implement superpage splitting for p2m mappings
  xen/riscv: implement mfn_valid() and page reference, ownership
    handling helpers
  xen/riscv: add support of page lookup by GFN

 xen/arch/riscv/Makefile                     |    1 +
 xen/arch/riscv/include/asm/domain.h         |   16 +
 xen/arch/riscv/include/asm/mm.h             |   45 +-
 xen/arch/riscv/include/asm/p2m.h            |  125 +-
 xen/arch/riscv/include/asm/page.h           |   33 +
 xen/arch/riscv/include/asm/riscv_encoding.h |    4 +
 xen/arch/riscv/include/asm/sbi.h            |   38 +
 xen/arch/riscv/mm.c                         |   97 +-
 xen/arch/riscv/p2m.c                        | 1188 +++++++++++++++++++
 xen/arch/riscv/sbi.c                        |   18 +
 xen/arch/riscv/setup.c                      |    3 +
 11 files changed, 1550 insertions(+), 18 deletions(-)
 create mode 100644 xen/arch/riscv/p2m.c

-- 
2.49.0