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Date:   Wed, 31 May 2023 16:24:16 +0200
From:   Andrew Jones <ajones@ventanamicro.com>
To:     Alexandre Ghiti <alexghiti@rivosinc.com>
Cc:     Jonathan Corbet <corbet@lwn.net>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Atish Patra <atishp@atishpatra.org>,
        Anup Patel <anup@brainfault.org>,
        Will Deacon <will@kernel.org>, Rob Herring <robh@kernel.org>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-perf-users@vger.kernel.org, linux-riscv@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 05/10] riscv: Prepare for user-space perf event mmap
 support
Message-ID: <20230531-107c91fd5c1926f7c8a2a25d@orel>
References: <20230512085321.13259-1-alexghiti@rivosinc.com>
 <20230512085321.13259-6-alexghiti@rivosinc.com>
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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>