[PATCH v4 0/8] RISC-V: Add support for ePMP v0.9.1

[Alistair Francis]

This series adds support for ePMP v0.9.1 to the QEMU RISC-V target.

This is based on previous patches, but has been rebased on the latest
master and updated for the latest spec.

The spec is avaliable at: 
https://docs.google.com/document/d/1Mh_aiHYxemL0umN3GTTw8vsbmzHZ_nxZXgjgOUzbvc8

This was tested by running Tock on the OpenTitan board.

This is based on the original work by:
 Hongzheng-Li <Ethan.Lee.QNL@gmail.com>
 Hou Weiying <weiying_hou@outlook.com>
 Myriad-Dreamin <camiyoru@gmail.com>

v4:
 - Fix the pmpcfg write function and log
v3:
 - Address Bin's comments on the ePMP implementation
v2:
 - Rebase on the RISC-V tree

Alistair Francis (4):
  target/riscv: Fix the PMP is locked check when using TOR
  target/riscv: Add the ePMP feature
  target/riscv/pmp: Remove outdated comment
  target/riscv: Add ePMP support for the Ibex CPU

Hou Weiying (4):
  target/riscv: Define ePMP mseccfg
  target/riscv: Add ePMP CSR access functions
  target/riscv: Implementation of enhanced PMP (ePMP)
  target/riscv: Add a config option for ePMP

 target/riscv/cpu.h        |   3 +
 target/riscv/cpu_bits.h   |   3 +
 target/riscv/pmp.h        |  14 +++
 target/riscv/cpu.c        |  11 ++
 target/riscv/csr.c        |  24 +++++
 target/riscv/pmp.c        | 218 ++++++++++++++++++++++++++++++++++----
 target/riscv/trace-events |   3 +
 7 files changed, 254 insertions(+), 22 deletions(-)

-- 
2.31.1