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| author | Andrea Parri <parri.andrea@gmail.com> | 2024-01-31 15:49:35 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-02-15 08:04:13 -0800 |
| commit | 4ff4c745a16c4c151a71863420811e7f406c3ec2 (patch) | |
| tree | fcda33acb75221cff1faee8582ab99e6ee96adbf /include/linux/sync_core.h | |
| parent | a14d11a0f5f4105e0df96811dfa81dc5f79fecba (diff) | |
| download | linux-4ff4c745a16c4c151a71863420811e7f406c3ec2.tar.gz linux-4ff4c745a16c4c151a71863420811e7f406c3ec2.tar.bz2 linux-4ff4c745a16c4c151a71863420811e7f406c3ec2.zip | |
locking: Introduce prepare_sync_core_cmd()
Introduce an architecture function that architectures can use to set
up ("prepare") SYNC_CORE commands.
The function will be used by RISC-V to update its "deferred icache-
flush" data structures (icache_stale_mask).
Architectures defining prepare_sync_core_cmd() static inline need to
select ARCH_HAS_PREPARE_SYNC_CORE_CMD.
Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/r/20240131144936.29190-4-parri.andrea@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'include/linux/sync_core.h')
| -rw-r--r-- | include/linux/sync_core.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/sync_core.h b/include/linux/sync_core.h index 013da4b8b327..67bb9794b875 100644 --- a/include/linux/sync_core.h +++ b/include/linux/sync_core.h @@ -17,5 +17,19 @@ static inline void sync_core_before_usermode(void) } #endif -#endif /* _LINUX_SYNC_CORE_H */ +#ifdef CONFIG_ARCH_HAS_PREPARE_SYNC_CORE_CMD +#include <asm/sync_core.h> +#else +/* + * This is a dummy prepare_sync_core_cmd() implementation that can be used on + * all architectures which provide unconditional core serializing instructions + * in switch_mm(). + * If your architecture doesn't provide such core serializing instructions in + * switch_mm(), you may need to write your own functions. + */ +static inline void prepare_sync_core_cmd(struct mm_struct *mm) +{ +} +#endif +#endif /* _LINUX_SYNC_CORE_H */ |