mbox series

[0/3] risc-v: Add ISA extension smcntrpmf support

Message ID cover.1689631639.git.kaiwenx@rivosinc.com
Headers show
Series risc-v: Add ISA extension smcntrpmf support | expand

Message

Kaiwen Xue July 18, 2023, 10:47 p.m. UTC 
This patch series adds the support for RISC-V ISA extension smcntrpmf (cycle and
privilege mode filtering) [1]. QEMU only calculates dummy cycles and
instructions, so there is no actual means to stop the icount in QEMU. Therefore,
this series only add the read/write behavior of the relevant CSRs such that the
implemented firmware support [2] can work without causing unnecessary illegal
instruction exceptions.

[1] https://github.com/riscv/riscv-smcntrpmf
[2] https://github.com/rivosinc/opensbi/tree/dev/kaiwenx/smcntrpmf_upstream

Kaiwen Xue (3):
  target/riscv: Add cycle & instret privilege mode filtering properties
  target/riscv: Add cycle & instret privilege mode filtering definitions
  target/riscv: Add cycle & instret privilege mode filtering support

 target/riscv/cpu.c      |  2 ++
 target/riscv/cpu.h      |  6 ++++
 target/riscv/cpu_bits.h | 29 ++++++++++++++++
 target/riscv/cpu_cfg.h  |  1 +
 target/riscv/csr.c      | 73 +++++++++++++++++++++++++++++++++++++++++
 5 files changed, 111 insertions(+)