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.
[1] https://github.com/riscv/riscv-j-extension
Signed-off-by: Charlie Jenkins <[email protected]>
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Charlie Jenkins (2):
riscv: Include riscv_set_icache_flush_ctx prctl
documentation: Document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl
Documentation/arch/riscv/cmodx.rst | 98 ++++++++++++++++++++++++++++++++++++++
Documentation/arch/riscv/index.rst | 1 +
arch/riscv/include/asm/mmu.h | 2 +
arch/riscv/include/asm/processor.h | 6 +++
arch/riscv/mm/cacheflush.c | 37 ++++++++++++++
arch/riscv/mm/context.c | 8 ++--
include/uapi/linux/prctl.h | 3 ++
kernel/sys.c | 6 +++
8 files changed, 158 insertions(+), 3 deletions(-)
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base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86
change-id: 20231117-fencei-f9f60d784fa0
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- Charlie