linux-kernel - Re: [External] Re: [PATCH v3 0/4] Obtain SMBIOS and ACPI entry from FFI

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Message-ID: <20230707-gargle-enjoyable-f9f7f87fc7ea@spud>
Date:   Fri, 7 Jul 2023 17:07:05 +0100
From:   Conor Dooley <conor@...nel.org>
To:     葛士建 <geshijian@...edance.com>
Cc:     Sunil V L <sunilvl@...tanamicro.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        ron minnich <rminnich@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Ard Biesheuvel <ardb@...nel.org>, cuiyunhui@...edance.com,
        jrtc27@...c27.com, kernel@...il.dk,
        Paul Walmsley <paul.walmsley@...ive.com>,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        Mark Rutland <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, weidong.wd@...edance.com,
        Dong Wei <Dong.Wei@....com>
Subject: Re: [External] Re: [PATCH v3 0/4] Obtain SMBIOS and ACPI entry from
 FFI

Hey,

On Fri, Jul 07, 2023 at 11:56:48PM +0800, 葛士建 wrote:
> On Fri, Jul 7, 2023 at 8:55 PM Sunil V L <sunilvl@...tanamicro.com> wrote:
> 
> > On Fri, Jul 07, 2023 at 08:05:48PM +0800, 葛士建 wrote:
> > > Hi Sunil,
> > >
> > > From Sunil:
> > > IMO, if the question is generic like "Is UEFI mandatory for RISC-V?",
> > > the answer will be solid "no" because we can use DT without UEFI. But if
> > > you ask whether UEFI is mandatory for ACPI support on RISC-V, then the
> > > answer will be "yes".
> > > ---- Why UEFI is mandatory for ACPI support on RISC-V?  As we know, on X86,
> > > ACPI works well without UEFI. Is there any limitation on RISC-V
> > > architecture?
> > Yes, the limitation is RISC-V can not use IA-PC BIOS. Please see
> > section 5.2.5 and 15 in ACPI spec.
> >
> > I don't have much to add to Ard's reasons.
> >
> > https://lore.kernel.org/linux-riscv/CAMj1kXFZren0Q19DimwQaETCLz64D4bZQC5B2N=i3SAWHygkTQ@mail.gmail.com/
> >

> I don't think that's the limitation on RISC-V. BTW, how does OSPM find the
> RSDP on ARM systems? Does it meet 5.2.5?
> 
> Here are
> 1. Purpose: purpose is to provide another option on Firmware Solution; Our
> purpose is NOT to ban UEFI.
> 2. Both ARM and RISC-V starts from UBOOT solution, and that's close to
> coreboot, so we would like to enable flexible and rich ecosystem.
> 3. We don't like to push coreboot and UEFI together, so we don't plan to
> enable UEFI in coreboot(maybe from Uboot); because that makes the solution
> complex.
> 4. I think we should fix the request and problem, banning or protecting
> something is NOT the goal of us.
> 
> I think the solution is for both RISC-V and ARM, and also it works on X86
> if it's done.
> Let me know what the problem and impact is, please.

If you are going to keep arguing this, please stop sending top-posted
HTML to the mailing list. It makes it impossible for those not in the CC
list to follow along.

Thanks,
Conor.

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