arch/riscv/cmodx.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 Concurrent Modification and Execution of Instructions (CMODX) for RISC-V Linux
9 (icache) are not guaranteed to be synchronized on RISC-V hardware. Therefore, the
14 applications. At any point the scheduler may migrate a task onto a new hart. If
16 storage with fence.i, the icache on the new hart will no longer be clean. This
17 is due to the behavior of fence.i only affecting the hart that it is called on.
18 Thus, the hart that the task has been migrated to may not have synchronized
23 userspace. The syscall performs a one-off icache flushing operation. The prctl
29 when the memory map being used by a hart changes. If the prctl() context caused
35 ---------------------
41 .. kernel-doc:: arch/riscv/mm/cacheflush.c
98 	addi a0, a0, 1