[PATCH v3 0/7] target/riscv: Add support for PC-relative translation

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

This patchset tries to add support for PC-relative translation.

The existence of CF_PCREL can improve performance with the guest
kernel's address space randomization.  Each guest process maps libc.so
(et al) at a different virtual address, and this allows those
translations to be shared.

And support of PC-relative translation is the precondition to support
pointer mask for instruction.

The port is available here:
https://github.com/plctlab/plct-qemu/tree/plct-pcrel-upstream-v3

v3:
 * rebase on riscv-to-apply.next

v2:
 * rebase on upstream and add pc-relative translation for Zc* instructions

Weiwei Li (7):
  target/riscv: Fix target address to update badaddr
  target/riscv: Introduce cur_insn_len into DisasContext
  target/riscv: Change gen_goto_tb to work on displacements
  target/riscv: Change gen_set_pc_imm to gen_update_pc
  target/riscv: Use true diff for gen_pc_plus_diff
  target/riscv: Enable PC-relative translation
  target/riscv: Remove pc_succ_insn from DisasContext

 target/riscv/cpu.c                            | 31 ++++--
 .../riscv/insn_trans/trans_privileged.c.inc   |  2 +-
 target/riscv/insn_trans/trans_rvi.c.inc       | 43 ++++++---
 target/riscv/insn_trans/trans_rvv.c.inc       |  4 +-
 target/riscv/insn_trans/trans_rvzawrs.c.inc   |  2 +-
 target/riscv/insn_trans/trans_rvzce.c.inc     | 10 +-
 target/riscv/insn_trans/trans_xthead.c.inc    |  2 +-
 target/riscv/translate.c                      | 94 ++++++++++++-------
 8 files changed, 123 insertions(+), 65 deletions(-)

-- 
2.25.1