[PATCH v2 0/8] target/riscv: Improve RISC-V Debug support

[Bin Meng <bmeng.cn@gmail.com>]

This patchset refactors RISC-V Debug support to allow more types of
triggers to be extended.

The initial support of type 6 trigger, which is similar to type 2
trigger with additional functionality, is also introduced in this
patchset.

This is a v2 respin of previous patch originally done by Frank Chang
at SiFive. I've incorperated my review comments in v2 and rebased
against QEMU mainline.

Changes in v2:
- fixed MXL_RV128 case
- moved macros to patch#2
- added log guest errors for TRIGGER_TYPE_{NO_EXIST,UNAVAIL}
- moved RV{32,64}_DATA_MASK definition to this patch
- add handling of the DBG_ACTION_NONE case in do_trigger_action()
- drop patch: "target/riscv: debug: Return 0 if previous value written to tselect >= number of triggers"

Frank Chang (8):
  target/riscv: debug: Determine the trigger type from tdata1.type
  target/riscv: debug: Introduce build_tdata1() to build tdata1 register
    content
  target/riscv: debug: Introduce tdata1, tdata2, and tdata3 CSRs
  target/riscv: debug: Restrict the range of tselect value can be
    written
  target/riscv: debug: Introduce tinfo CSR
  target/riscv: debug: Create common trigger actions function
  target/riscv: debug: Check VU/VS modes for type 2 trigger
  target/riscv: debug: Add initial support of type 6 trigger

 target/riscv/cpu.h      |   6 +-
 target/riscv/cpu_bits.h |   1 +
 target/riscv/debug.h    |  55 +++--
 target/riscv/csr.c      |  10 +-
 target/riscv/debug.c    | 484 ++++++++++++++++++++++++++++++++--------
 target/riscv/machine.c  |  20 +-
 6 files changed, 445 insertions(+), 131 deletions(-)

-- 
2.34.1