Re: [PATCH v13 2/4] riscv: Include riscv_set_icache_flush_ctx prctl

[Samuel Holland]

On 2024-03-12 6:53 PM, Charlie Jenkins wrote:
> Support new prctl with key PR_RISCV_SET_ICACHE_FLUSH_CTX to enable
> optimization of cross modifying code. This prctl enables userspace code
> to use icache flushing instructions such as fence.i with the guarantee
> that the icache will continue to be clean after thread migration.
> 
> Signed-off-by: Charlie Jenkins <charlie@xxxxxxxxxxxx>
> Reviewed-by: Atish Patra <atishp@xxxxxxxxxxxx>
> Reviewed-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
> ---
>  arch/riscv/include/asm/mmu.h       |   2 +
>  arch/riscv/include/asm/processor.h |  10 ++++
>  arch/riscv/include/asm/switch_to.h |  23 ++++++++
>  arch/riscv/mm/cacheflush.c         | 111 +++++++++++++++++++++++++++++++++++++
>  arch/riscv/mm/context.c            |  19 ++++---
>  include/uapi/linux/prctl.h         |   6 ++
>  kernel/sys.c                       |   6 ++
>  7 files changed, 169 insertions(+), 8 deletions(-)

Thanks for the updates!

Reviewed-by: Samuel Holland <samuel.holland@xxxxxxxxxx>