Introduce necessary things to enable DOMAIN_BUILD_HELPERS config for RISC-V.

This patch series is rebased on top of patch "xen: introduce CONFIG_HAS_DOMAIN_TYPE"
but there is no any technical dependency.

CI: https://gitlab.com/xen-project/people/olkur/xen/-/pipelines/2506574229

---
Changes in v5:
 - Merged to upstream staging:
     xen/riscv: implement get_page_from_gfn()
 - Address other comments from ML.
---
Changes in v4:
 - Move patch up, closer to other common/Arm related patches:
   - xen/dom0less: rename kernel_zimage_probe() to  kernel_image_probe()
   - xen: move declaration of fw_unreserved_regions() to common header
   - xen: move domain_use_host_layout() to common header
   - xen: rename p2m_ipa_bits to p2m_gpa_bits

 - Merged to upstream/staging:
     xen/riscv: implement get_page_from_gfn()

 - Rebase this patch series on top of [PATCH v3 0/3] dom0less: various updates. 
 - Address the comments from ML.
---
Changes in v3:
 - Address the comments from ML.
---
Changes in v2:
 - Address the comments from ML.
 - Introduce some new patches to make dom0less solution more architecture
   indepenent from terminology point of view.
 - Minor fixes.
---

Oleksii Kurochko (11):
  xen: arm: fix len type for guest copy functions
  xen/dom0less: rename kernel_zimage_probe() to kernel_image_probe()
  xen: move declaration of fw_unreserved_regions() to common header
  xen: introduce domain-layout.h with common domain_use_host_layout()
  xen/device-tree: use p2m_gpa_bits in common code
  xen/riscv: implement copy_to_guest_phys()
  xen/riscv: add Linux kernel loading support
  xen/riscv: rework G-stage mode handling
  xen/riscv: introduce p2m_gpa_bits
  xen/riscv: add definition of guest RAM banks
  xen/riscv: enable DOMAIN_BUILD_HELPERS

 xen/arch/arm/domain_build.c               |   1 +
 xen/arch/arm/guestcopy.c                  |   6 +-
 xen/arch/arm/include/asm/domain.h         |  14 --
 xen/arch/arm/include/asm/guest_access.h   |   2 +-
 xen/arch/arm/include/asm/p2m.h            |   2 +
 xen/arch/arm/include/asm/setup.h          |   3 -
 xen/arch/arm/kernel.c                     |  50 ++---
 xen/arch/arm/vgic-v3.c                    |   1 +
 xen/arch/riscv/Kconfig                    |   1 +
 xen/arch/riscv/Makefile                   |   3 +
 xen/arch/riscv/dom0less-build.c           |  71 ++++++
 xen/arch/riscv/guestcopy.c                | 116 ++++++++++
 xen/arch/riscv/include/asm/config.h       |  13 ++
 xen/arch/riscv/include/asm/domain.h       |   1 +
 xen/arch/riscv/include/asm/guest-layout.h |  23 ++
 xen/arch/riscv/include/asm/guest_access.h |   7 +
 xen/arch/riscv/include/asm/p2m.h          |  21 +-
 xen/arch/riscv/include/asm/paging.h       |   1 +
 xen/arch/riscv/kernel.c                   | 249 ++++++++++++++++++++++
 xen/arch/riscv/p2m.c                      | 134 ++++++++----
 xen/arch/riscv/vmid.c                     |   2 +-
 xen/common/device-tree/domain-build.c     |   3 +-
 xen/common/device-tree/kernel.c           |   2 +-
 xen/include/public/arch-riscv.h           |   5 +
 xen/include/xen/bootinfo.h                |   4 +
 xen/include/xen/domain-layout.h           |  28 +++
 xen/include/xen/fdt-domain-build.h        |   2 +-
 xen/include/xen/fdt-kernel.h              |  17 +-
 28 files changed, 683 insertions(+), 99 deletions(-)
 create mode 100644 xen/arch/riscv/dom0less-build.c
 create mode 100644 xen/arch/riscv/guestcopy.c
 create mode 100644 xen/arch/riscv/include/asm/guest-layout.h
 create mode 100644 xen/arch/riscv/kernel.c
 create mode 100644 xen/include/xen/domain-layout.h

-- 
2.54.0