Andrea Parri cd9b29014d membarrier: riscv: Provide core serializing command ... RISC-V uses xRET instructions on return from interrupt and to go back to user-space; the xRET instruction is not core serializing. Use FENCE.I for providing core serialization as follows: - by calling sync_core_before_usermode() on return from interrupt (cf. ipi_sync_core()), - via switch_mm() and sync_core_before_usermode() (respectively, for uthread->uthread and kthread->uthread transitions) before returning to user-space. On RISC-V, the serialization in switch_mm() is activated by resetting the icache_stale_mask of the mm at prepare_sync_core_cmd(). Suggested-by: Palmer Dabbelt <palmer@dabbelt.com> Signed-off-by: Andrea Parri <parri.andrea@gmail.com> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://lore.kernel.org/r/20240131144936.29190-5-parri.andrea@gmail.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-02-15 08:04:14 -08:00
..
core	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
debug	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
io/dma-contiguous	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
locking	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
perf	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
sched	membarrier: riscv: Provide core serializing command	2024-02-15 08:04:14 -08:00
scripts	Documentation/features-refresh.sh: Only sed the beginning "arch" of ARCH_DIR	2022-12-05 02:50:12 -07:00
seccomp/seccomp-filter	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
time	Documentation: Drop IA64 from feature descriptions	2023-09-11 08:13:18 +00:00
vm	riscv: Add support for BATCHED_UNMAP_TLB_FLUSH	2024-01-11 08:01:53 -08:00
arch-support.txt	Documentation/features: mark BATCHED_UNMAP_TLB_FLUSH doesn't apply to ARM64	2021-03-15 13:17:40 -06:00
list-arch.sh	scripts: get_feat.pl: use its implementation for list-arch.sh	2020-12-03 15:10:14 -07:00