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From:   =?UTF-8?B?6L+Q6L6J5bSU?= <cuiyunhui@bytedance.com>
Date:   Wed, 26 Apr 2023 17:34:55 +0800
Message-ID: <CAEEQ3wkJB5CKm33mHXUOPX5makYOHF8By6FYGnNzRkM-Mo72OQ@mail.gmail.com>
Subject: Re: [External] Re: [PATCH] firmware: added a firmware information
 passing method FFI
To:     Ard Biesheuvel <ardb@kernel.org>
Cc:     Mark Rutland <mark.rutland@arm.com>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>, rafael@kernel.org,
        lenb@kernel.org, jdelvare@suse.com, cujomalainey@chromium.org,
        yc.hung@mediatek.com, angelogioacchino.delregno@collabora.com,
        allen-kh.cheng@mediatek.com, pierre-louis.bossart@linux.intel.com,
        tinghan.shen@mediatek.com, linux-kernel@vger.kernel.org,
        linux-acpi@vger.kernel.org, rminnich@gmail.com
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Hi Ard,

On Wed, Apr 26, 2023 at 3:09=E2=80=AFPM Ard Biesheuvel <ardb@kernel.org> wr=
ote:
>
> Hello Yunhui,
>
> I am not sure this is a good idea: this is clearly intended for arm64,
> which cannot use ACPI without the EFI memory map, which it uses to
> cross reference memory opregion accesses, to determine the correct
> memory type attributes.
>
Not only for arm64, but also other arches, such as riscv.
For memory-related nodes, it will be done in the early scan of the device t=
ree.


> What is the use case you are trying to accommodate here?
>
Some bootloaders do not support uefi, such as coreboot,
but need to support acpi, smbios.


Thanks,
Yunhui