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From: Loys Ollivier <lollivier@baylibre.com>
To: Atish Patra <atish.patra@wdc.com>, linux-kernel@vger.kernel.org
Cc: mark.rutland@arm.com, Jonathan Corbet <corbet@lwn.net>,
	Albert Ou <aou@eecs.berkeley.edu>,
	linux-doc@vger.kernel.org, catalin.marinas@arm.com,
	ard.biesheuvel@linaro.org, Zong Li <zong@andestech.com>,
	Atish Patra <atish.patra@wdc.com>,
	Anup Patel <Anup.Patel@wdc.com>,
	Palmer Dabbelt <palmer@sifive.com>,
	"paul.walmsley@sifive.com" <paul.walmsley@sifive.com>,
	Nick Kossifidis <mick@ics.forth.gr>,
	linux-riscv@lists.infradead.org,
	"marek.vasut@gmail.com" <marek.vasut@gmail.com>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Karsten Merker <merker@debian.org>
Subject: Re: [v4 PATCH] RISC-V: Add an Image header that boot loader can parse.
Date: Mon, 27 May 2019 14:14:03 +0200	[thread overview]
Message-ID: <86zhn8p01g.fsf@baylibre.com> (raw)
In-Reply-To: <20190524041814.7497-1-atish.patra@wdc.com>

On Thu 23 May 2019 at 21:18, Atish Patra <atish.patra@wdc.com> wrote:

> Currently, the last stage boot loaders such as U-Boot can accept only
> uImage which is an unnecessary additional step in automating boot
> process.
>
> Add an image header that boot loader understands and boot Linux from
> flat Image directly.
>
> This header is based on ARM64 boot image header and provides an
> opportunity to combine both ARM64 & RISC-V image headers in future.
>
> Also make sure that PE/COFF header can co-exist in the same image so
> that EFI stub can be supported for RISC-V in future. EFI specification
> needs PE/COFF image header in the beginning of the kernel image in order
> to load it as an EFI application. In order to support EFI stub, code0
> should be replaced with "MZ" magic string and res4(at offset 0x3c)
> should point to the rest of the PE/COFF header (which will be added
> during EFI support).
>
> Tested on both QEMU and HiFive Unleashed using OpenSBI + U-Boot + Linux.

Thanks Atish, happy to have this support that makes the boot process
more straightforward.
Tested on HiFive Unleashed using OpenSBI + U-Boot v2019.07-rc2 + Linux.

>
> Signed-off-by: Atish Patra <atish.patra@wdc.com>
> Reviewed-by: Karsten Merker <merker@debian.org>
> Tested-by: Karsten Merker <merker@debian.org> (QEMU+OpenSBI+U-Boot)
Tested-by: Loys Ollivier <lollivier@baylibre.com>

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  reply	other threads:[~2019-05-27 12:14 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-24  4:18 [v4 PATCH] RISC-V: Add an Image header that boot loader can parse Atish Patra
2019-05-27 12:14 ` Loys Ollivier [this message]
2019-05-27 14:34 ` Ard Biesheuvel
2019-05-27 22:16   ` Karsten Merker
2019-05-27 23:41     ` Troy Benjegerdes
2019-05-28  3:54       ` Anup Patel
2019-05-28  8:22         ` Karsten Merker
2019-05-28 10:34           ` Anup Patel
2019-05-28 10:46             ` Ard Biesheuvel
2019-05-28 19:39               ` Atish Patra

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