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| author | Atish Patra <atishp@rivosinc.com> | 2024-07-11 15:31:10 -0700 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2024-07-18 12:08:44 +1000 |
| commit | b2d7a7c7e4e30fb5341d38deac968de675f9419c (patch) | |
| tree | cb43938ffe2840b746896b1c4f24e62d6de675ad /docs/sphinx/kerneldoc.py | |
| parent | 3b31b7baff02b357a6c921b26ae953e04d0cfdbb (diff) | |
| download | focaccia-qemu-b2d7a7c7e4e30fb5341d38deac968de675f9419c.tar.gz focaccia-qemu-b2d7a7c7e4e30fb5341d38deac968de675f9419c.zip | |
target/riscv: Implement privilege mode filtering for cycle/instret
Privilege mode filtering can also be emulated for cycle/instret by tracking host_ticks/icount during each privilege mode switch. This patch implements that for both cycle/instret and mhpmcounters. The first one requires Smcntrpmf while the other one requires Sscofpmf to be enabled. The cycle/instret are still computed using host ticks when icount is not enabled. Otherwise, they are computed using raw icount which is more accurate in icount mode. Co-Developed-by: Rajnesh Kanwal <rkanwal@rivosinc.com> Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Atish Patra <atishp@rivosinc.com> Message-ID: <20240711-smcntrpmf_v7-v8-7-b7c38ae7b263@rivosinc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
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