forked from mirrors/linux
4ff4c745a1
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>
35 lines
1 KiB
C
35 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SYNC_CORE_H
|
|
#define _LINUX_SYNC_CORE_H
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
|
|
#include <asm/sync_core.h>
|
|
#else
|
|
/*
|
|
* This is a dummy sync_core_before_usermode() implementation that can be used
|
|
* on all architectures which return to user-space through core serializing
|
|
* instructions.
|
|
* If your architecture returns to user-space through non-core-serializing
|
|
* instructions, you need to write your own functions.
|
|
*/
|
|
static inline void sync_core_before_usermode(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#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 */
|