linux-kernel - Re: [RFC 3/9] RISC-V: Add FIRMWARE_READ

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Message-ID: <CAAhSdy0_DdCeFdzzJgoWhnrMz1-UqQXKLWNBAAXB6SQ_eJ2gyg@mail.gmail.com>
Date:   Thu, 14 Dec 2023 17:46:17 +0530
From:   Anup Patel <anup@...infault.org>
To:     Atish Patra <atishp@...osinc.com>
Cc:     linux-kernel@...r.kernel.org,
        Alexandre Ghiti <alexghiti@...osinc.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Atish Patra <atishp@...shpatra.org>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Guo Ren <guoren@...nel.org>, Icenowy Zheng <uwu@...nowy.me>,
        kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Will Deacon <will@...nel.org>
Subject: Re: [RFC 3/9] RISC-V: Add FIRMWARE_READ_HI definition

On Tue, Dec 5, 2023 at 8:13 AM Atish Patra <atishp@...osinc.com> wrote:
>
> SBI v2.0 added another function to SBI PMU extension to read
> the upper bits of a counter with width larger than XLEN.
>
> Add the definition for that function.
>
> Signed-off-by: Atish Patra <atishp@...osinc.com>

LGTM.

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

Regards,
Anup

> ---
>  arch/riscv/include/asm/sbi.h | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 0892f4421bc4..f3eeca79a02d 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -121,6 +121,7 @@ enum sbi_ext_pmu_fid {
>         SBI_EXT_PMU_COUNTER_START,
>         SBI_EXT_PMU_COUNTER_STOP,
>         SBI_EXT_PMU_COUNTER_FW_READ,
> +       SBI_EXT_PMU_COUNTER_FW_READ_HI,
>  };
>
>  union sbi_pmu_ctr_info {
> --
> 2.34.1
>