Re: [PATCH v2 05/10] riscv: Prepare for user-space perf event mmap support

Andrew Jones
2023-05-31T14:24:48Z

On Fri, May 12, 2023 at 10:53:16AM +0200, Alexandre Ghiti wrote:
> Provide all the necessary bits in the generic riscv pmu driver to be
> able to mmap perf events in userspace: the heavy lifting lies in the
> driver backend, namely the legacy and sbi implementations.
>
> Note that arch_perf_update_userpage is almost a copy of arm64 code.
>
> Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
> ---
> arch/riscv/kernel/Makefile | 2 +-
> arch/riscv/kernel/perf_event.c | 58 ++++++++++++++++++++++++++++++++++
> drivers/perf/riscv_pmu.c | 41 ++++++++++++++++++++++++
> include/linux/perf/riscv_pmu.h | 4 +++
> 4 files changed, 104 insertions(+), 1 deletion(-)
> create mode 100644 arch/riscv/kernel/perf_event.c
>

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>