Introduce functions required to perform a p2m context switch during a vCPU
context switch.

Although this patch series is technically independent of [1], some merge
conflicts are still possible depending on which series is applied first.
For now, the series has been rebased on top of [1] but can go without [1].

[1] https://lore.kernel.org/xen-devel/cover.1770650552.git.oleksii.kurochko@gmail.com/T/#m5d8de24e5ee0eaf6f35f9f1437a00096e3574684

---
Changes in v2:
 - Drop patch "xen/riscv: introduce struct arch_vcpu", took only declaration of
   vsatp and squash it with the patch:
     xen/riscv: implement p2m_ctx_switch_{to,from}_state()
 - Other changes please look at specific patch.
 - CI tests: https://gitlab.com/xen-project/people/olkur/xen/-/pipelines/2317277592
---


Oleksii Kurochko (2):
  xen/riscv: add support for local guest TLB flush using HFENCE.VVMA
  xen/riscv: add p2m context switch handling for VSATP and HGATP

 xen/arch/riscv/include/asm/domain.h    |   1 +
 xen/arch/riscv/include/asm/flushtlb.h  |   7 ++
 xen/arch/riscv/include/asm/insn-defs.h |  10 ++
 xen/arch/riscv/include/asm/p2m.h       |  11 +++
 xen/arch/riscv/p2m.c                   | 123 +++++++++++++++++++++++++
 xen/arch/riscv/traps.c                 |   2 +
 6 files changed, 154 insertions(+)
 create mode 100644 xen/arch/riscv/include/asm/insn-defs.h

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2.52.0