Merge patch series "target/riscv: Various fixes to gdbstub and CSR access"

Merge patch series "target/riscv: Various fixes to gdbstub and CSR access"

Bin Meng <bmeng@tinylab.org> says:

At present gdbstub reports an incorrect / incomplete CSR list in the
target description XML, for example:

- menvcfg is reported in 'sifive_u' machine
- fcsr is missing in a F/D enabled processor

The issue is caused by:
- priv spec version check is missing when reporting CSRs
- CSR predicate() routine is called without turning on the debugger flag

* b4-shazam-merge:
  target/riscv: Group all predicate() routines together
  target/riscv: Drop priv level check in mseccfg predicate()
  target/riscv: Allow debugger to access sstc CSRs
  target/riscv: Allow debugger to access {h, s}stateen CSRs
  target/riscv: Allow debugger to access seed CSR
  target/riscv: Allow debugger to access user timer and counter CSRs
  target/riscv: gdbstub: Drop the vector CSRs in riscv-vector.xml
  target/riscv: gdbstub: Turn on debugger mode before calling CSR predicate()
  target/riscv: Avoid reporting odd-numbered pmpcfgX in the CSR XML for RV64
  target/riscv: Simplify getting RISCVCPU pointer from env
  target/riscv: Simplify {read, write}_pmpcfg() a little bit
  target/riscv: Use 'bool' type for read_only
  target/riscv: Coding style fixes in csr.c
  target/riscv: gdbstub: Do not generate CSR XML if Zicsr is disabled
  target/riscv: gdbstub: Minor change for better readability
  target/riscv: Use g_assert() for the predicate() NULL check
  target/riscv: Add some comments to clarify the priority policy of riscv_csrrw_check()
  target/riscv: gdbstub: Check priv spec version before reporting CSR

Message-ID: <20230228104035.1879882-1-bmeng@tinylab.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>