mbox series

[v3,0/5] Add ISA extension smcntrpmf support

Message ID 20240105221327.176764-1-atishp@rivosinc.com
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Series Add ISA extension smcntrpmf support | expand

Message

Atish Kumar Patra Jan. 5, 2024, 10:13 p.m. UTC 
This patch series adds the support for RISC-V ISA extension smcntrpmf (cycle and
privilege mode filtering) [1]. It is based on Kevin's earlier work but improves
it by actually implement privilege mode filtering by tracking the privilege
mode switches. This enables the privilege mode filtering for mhpmcounters as
well. However, Smcntrpmf/Sscofpmf must be enabled to leverage this. This series
also modified to report the raw instruction count instead of virtual cpu time
based on the instruction count when icount is enabled. The former seems to be
the preferred approach for instruction count for other architectures as well.

Please let me know if anybody thinks that's incorrect.

The series is also available at

Changes from v2->v3:
1. Fixed the rebasing error in PATCH2.
2. Added RB tags.
3. Addressed other review comments. 

Changes from v1->v2:
1. Implemented actual mode filtering for both icount and host ticks mode.
1. Addressed comments in v1.
2. Added Kevin's personal email address.

[1] https://github.com/riscv/riscv-smcntrpmf
[2] https://github.com/atishp04/qemu/tree/smcntrpmf_v3

Atish Patra (2):
target/riscv: Fix the predicate functions for mhpmeventhX CSRs
target/riscv: Implement privilege mode filtering for cycle/instret

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        |  17 +++
target/riscv/cpu_bits.h   |  29 +++++
target/riscv/cpu_cfg.h    |   1 +
target/riscv/cpu_helper.c |   9 +-
target/riscv/csr.c        | 242 ++++++++++++++++++++++++++++++--------
target/riscv/pmu.c        |  43 +++++++
target/riscv/pmu.h        |   2 +
8 files changed, 292 insertions(+), 53 deletions(-)

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2.34.1