[RFC PATCH 0/3] support subsets of virtual memory extension

[liweiwei <liweiwei@iscas.ac.cn>]

This patchset implements virtual memory related RISC-V extensions: Svnapot version 0.1, Svinval vesion 0.1, Svpbmt version 0.1. 

Specification:
https://github.com/riscv/virtual-memory/tree/main/specs

The port is available here:
https://github.com/plctlab/plct-qemu/tree/plct-vritmem-upstream

To test svinval implementation, specify cpu argument with 'x-svinval=true'. Other two extensions are enabled by default.

This implementation can pass the riscv-tests for rv64ssvnapot.

liweiwei (3):
  target/riscv: add support for svnapot extension
  target/riscv: add support for svinval extension
  target/riscv: add support for svpbmt extension

 target/riscv/cpu.c                          |  1 +
 target/riscv/cpu.h                          |  1 +
 target/riscv/cpu_bits.h                     |  5 ++
 target/riscv/cpu_helper.c                   | 25 +++++--
 target/riscv/insn32.decode                  |  7 ++
 target/riscv/insn_trans/trans_svinval.c.inc | 75 +++++++++++++++++++++
 target/riscv/translate.c                    |  1 +
 7 files changed, 108 insertions(+), 7 deletions(-)
 create mode 100644 target/riscv/insn_trans/trans_svinval.c.inc

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2.17.1