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| author | Palmer Dabbelt <palmer@rivosinc.com> | 2024-04-17 04:50:58 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-04-30 20:35:42 +0300 |
| commit | 4202f62cb64b8a04782435f1006c322af2d2619b (patch) | |
| tree | 080886df135391903ff5c530bc08efe5a803dbcc /include/uapi | |
| parent | 3f45244289398b6f29074fdb91dd164667bb0960 (diff) | |
| parent | decde1fa209323c77a7498e803350c5f3e992d62 (diff) | |
| download | linux-4202f62cb64b8a04782435f1006c322af2d2619b.tar.xz | |
Merge patch series "riscv: Create and document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl"
Charlie Jenkins <charlie@rivosinc.com> says:
Improve the performance of icache flushing by creating a new prctl flag
PR_RISCV_SET_ICACHE_FLUSH_CTX. The interface is left generic to allow
for future expansions such as with the proposed J extension [1].
Documentation is also provided to explain the use case.
Patch sent to add PR_RISCV_SET_ICACHE_FLUSH_CTX to man-pages [2].
[1] https://github.com/riscv/riscv-j-extension
[2] https://lore.kernel.org/linux-man/20240124-fencei_prctl-v1-1-0bddafcef331@rivosinc.com
* b4-shazam-merge:
cpumask: Add assign cpu
documentation: Document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl
riscv: Include riscv_set_icache_flush_ctx prctl
riscv: Remove unnecessary irqflags processor.h include
Link: https://lore.kernel.org/r/20240312-fencei-v13-0-4b6bdc2bbf32@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/prctl.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h index 370ed14b1ae0..524d546d697b 100644 --- a/include/uapi/linux/prctl.h +++ b/include/uapi/linux/prctl.h @@ -306,4 +306,10 @@ struct prctl_mm_map { # define PR_RISCV_V_VSTATE_CTRL_NEXT_MASK 0xc # define PR_RISCV_V_VSTATE_CTRL_MASK 0x1f +#define PR_RISCV_SET_ICACHE_FLUSH_CTX 71 +# define PR_RISCV_CTX_SW_FENCEI_ON 0 +# define PR_RISCV_CTX_SW_FENCEI_OFF 1 +# define PR_RISCV_SCOPE_PER_PROCESS 0 +# define PR_RISCV_SCOPE_PER_THREAD 1 + #endif /* _LINUX_PRCTL_H */ |