This is the first part of v6 patchset. The changelog of v6 is only coverd
the part1.

Features:
  * support specification riscv-v-spec-0.7.1.
  * support basic vector extension.
  * support Zvlsseg.
  * support Zvamo.
  * not support Zvediv as it is changing.
  * SLEN always equals VLEN.
  * element width support 8bit, 16bit, 32bit, 64bit.

Changelog:
v6
  * keep vector CSR in read/write order
  * define fields name of VTYPE just like specification.
v5
  * vector registers as direct fields in RISCVCPUState.
  * mov the properties to last patch.
  * check RVV in vs().
  * check if rs1 is x0 in vsetvl/vsetvli.
  * check VILL, EDIV, RESERVED fileds in vsetvl.
v4
  * adjust max vlen to 512 bits.
  * check maximum on elen(64bits).
  * check minimum on vlen(128bits).
  * check if rs1 is x0 in vsetvl/vsetvli.
  * use gen_goto_tb in vsetvli instead of exit_tb.
  * fixup fetch vlmax from rs2, not env->vext.type.
v3
  * support VLEN configure from qemu command line.
  * support ELEN configure from qemu command line.
  * support vector specification version configure from qemu command line.
  * only default on for "any" cpu, others turn on from command line.
  * use a continous memory block for vector register description.
V2
  * use float16_compare{_quiet}
  * only use GETPC() in outer most helper
  * add ctx.ext_v Property

LIU Zhiwei (4):
  target/riscv: add vector extension field in CPURISCVState
  target/riscv: implementation-defined constant parameters
  target/riscv: support vector extension csr
  target/riscv: add vector configure instruction

 target/riscv/Makefile.objs              |  2 +-
 target/riscv/cpu.c                      |  7 +++
 target/riscv/cpu.h                      | 78 ++++++++++++++++++++++---
 target/riscv/cpu_bits.h                 | 15 +++++
 target/riscv/csr.c                      | 75 +++++++++++++++++++++++-
 target/riscv/helper.h                   |  2 +
 target/riscv/insn32.decode              |  5 ++
 target/riscv/insn_trans/trans_rvv.inc.c | 69 ++++++++++++++++++++++
 target/riscv/translate.c                | 17 +++++-
 target/riscv/vector_helper.c            | 53 +++++++++++++++++
 10 files changed, 311 insertions(+), 12 deletions(-)
 create mode 100644 target/riscv/insn_trans/trans_rvv.inc.c
 create mode 100644 target/riscv/vector_helper.c

-- 
2.23.0