linux-kernel - Re: [PATCH] riscv: gcov: enable gcov for RISC-V

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Date:   Thu, 2 Jan 2020 09:07:12 +0530
From:   Anup Patel <anup@...infault.org>
To:     Zong Li <zong.li@...ive.com>
Cc:     corbet@....net, Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>, linux-doc@...r.kernel.org,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH] riscv: gcov: enable gcov for RISC-V

On Thu, Jan 2, 2020 at 8:40 AM Zong Li <zong.li@...ive.com> wrote:
>
> This patch enables GCOV code coverage measurement on RISC-V.
> Lightly tested on QEMU and Hifive Unleashed board, seems to work as
> expected.
>
> Signed-off-by: Zong Li <zong.li@...ive.com>
> ---
>  Documentation/features/debug/gcov-profile-all/arch-support.txt | 2 +-
>  arch/riscv/Kconfig                                             | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/features/debug/gcov-profile-all/arch-support.txt b/Documentation/features/debug/gcov-profile-all/arch-support.txt
> index 059d58a549c7..6fb2b0671994 100644
> --- a/Documentation/features/debug/gcov-profile-all/arch-support.txt
> +++ b/Documentation/features/debug/gcov-profile-all/arch-support.txt
> @@ -23,7 +23,7 @@
>      |    openrisc: | TODO |
>      |      parisc: | TODO |
>      |     powerpc: |  ok  |
> -    |       riscv: | TODO |
> +    |       riscv: |  ok  |
>      |        s390: |  ok  |
>      |          sh: |  ok  |
>      |       sparc: | TODO |
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index d8efbaa78d67..a31169b02ec0 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -64,6 +64,7 @@ config RISCV
>         select SPARSEMEM_STATIC if 32BIT
>         select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
>         select HAVE_ARCH_MMAP_RND_BITS if MMU
> +       select ARCH_HAS_GCOV_PROFILE_ALL
>
>  config ARCH_MMAP_RND_BITS_MIN
>         default 18 if 64BIT
> --
> 2.24.1
>

Looks good to me.

Reviewed-by: Anup Patel <anup@...infault.org>

May be (not 100% sure) split this into two patches so that
Documentation patch can be taken by Jonathan.

Regards,
Anup