linux-kernel - Re: [External] Re: [PATCH v2 1/3] riscv: obtain ACPI RSDP from FFI.

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Message-ID: <CANBLGcwcvK55dZ1__wvWCtcw=XoKt=qki8g6C_QYo+TBqqJ=TA@mail.gmail.com>
Date:   Mon, 3 Jul 2023 20:58:04 +0200
From:   Emil Renner Berthing <emil.renner.berthing@...il.com>
To:     运辉崔 <cuiyunhui@...edance.com>
Cc:     Andrew Jones <ajones@...tanamicro.com>, ardb@...nel.org,
        palmer@...belt.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        rminnich@...il.com, mark.rutland@....com, lpieralisi@...nel.org,
        rafael@...nel.org, lenb@...nel.org, jdelvare@...e.com,
        yc.hung@...iatek.com, angelogioacchino.delregno@...labora.com,
        allen-kh.cheng@...iatek.com, pierre-louis.bossart@...ux.intel.com,
        tinghan.shen@...iatek.com, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, geshijian@...edance.com,
        weidong.wd@...edance.com
Subject: Re: [External] Re: [PATCH v2 1/3] riscv: obtain ACPI RSDP from FFI.

On Mon, 3 Jul 2023 at 15:33, 运辉崔 <cuiyunhui@...edance.com> wrote:
>
> Hi drew,
>
> On Mon, Jul 3, 2023 at 9:01 PM Andrew Jones <ajones@...tanamicro.com> wrote:
> >
> >
> > (This is a reply to a non-existent cover letter.)
>
> This has been discussed many times with Ard, Please refer to :
> https://patches.linaro.org/project/linux-acpi/patch/20230426034001.16-1-cuiyunhui@bytedance.com/

Hi Yunhui,

>From that discussion it was mentioned that that arm supports 3 methods
of booting:
  direct + devicetree
  EFI + devicetree
  EFI + ACPI
..but not
  direct + ACPI

To me it isn't obvious from that or this thread, and since arm seems
to be doing fine without the 4th option I'm curious why that's
necessary on riscv?

> > I'm not a big fan of adding yet another interface. Have you considered
> > doing something like [1]?
> >
> > [1] https://github.com/tianocore/tianocore.github.io/wiki/UefiPayloadPkg

Also you didn't answer this question, which I'd also like to hear a reply to.

/Emil

> > Thanks,
> > drew
>
> Thanks,
> Yunhui
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

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