[PATCH V4 0/6] Support RISC-V migration

[Yifei Jiang <jiangyifei@huawei.com>]

This patches supported RISC-V migration based on tcg accel. And we have
verified related migration features such as snapshot and live migration.

A few weeks ago, we submitted RFC patches about supporting RISC-V migration
based on kvm accel: https://www.spinics.net/lists/kvm/msg223605.html.
And we found that tcg accelerated migration can be supported with a few
changes. Most of the devices have already implemented the migration
interface, so, to achieve the tcg accelerated migration, we just need to
add vmstate of both cpu and sifive_plic.

changes since v3
1. Apply Alistair's patch to exend get/set_field():
   https://www.mail-archive.com/qemu-devel@nongnu.org/msg753575.html
2. Remake the patch: Merge m/vsstatus and m/vsstatush into one uint64_t
   unit.

Changes since v2:
1. Move vmstate_riscv_cpu declaration to internals.h.
2. Merge m/vsstatus and m/vsstatush into one uint64_t unit.

Changes since v1:
1. Add license head to target/riscv/machine.c.
2. Regenerate some state of PMP at post_load hook.

Yifei Jiang (6):
  target/riscv: Merge m/vsstatus and m/vsstatush into one uint64_t unit
  target/riscv: Add basic vmstate description of CPU
  target/riscv: Add PMP state description
  target/riscv: Add H extension state description
  target/riscv: Add V extension state description
  target/riscv: Add sifive_plic vmstate

 hw/intc/sifive_plic.c     |  26 ++++-
 hw/intc/sifive_plic.h     |   1 +
 target/riscv/cpu.c        |  16 ++--
 target/riscv/cpu.h        |  24 +++--
 target/riscv/cpu_bits.h   |  19 +---
 target/riscv/cpu_helper.c |  35 ++-----
 target/riscv/csr.c        |  18 ++--
 target/riscv/internals.h  |   4 +
 target/riscv/machine.c    | 196 ++++++++++++++++++++++++++++++++++++++
 target/riscv/meson.build  |   3 +-
 target/riscv/op_helper.c  |  11 +--
 target/riscv/pmp.c        |  29 +++---
 target/riscv/pmp.h        |   2 +
 13 files changed, 290 insertions(+), 94 deletions(-)
 create mode 100644 target/riscv/machine.c

-- 
2.19.1