From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [PATCH v2 0/6] qemu-arm64: Allow booting via Trusted Firmware
Date: Wed, 30 Sep 2020 13:39:58 -0400 [thread overview]
Message-ID: <20200930173958.GG14816@bill-the-cat> (raw)
In-Reply-To: <20200930163918.24995-1-andre.przywara@arm.com>
On Wed, Sep 30, 2020 at 05:39:12PM +0100, Andre Przywara wrote:
> U-Boot on QEMU-arm64 can be used in two configurations: Loaded directly
> via QEMU's -bios option, or as a non-secure payload (BL33) via
> ARM Trusted Firmware-A (TF-A).
> In the latter case we need to define CONFIG_TFABOOT, to accommodate
> the first flash bank being secure only, and manually set SYS_TEXT_BASE
> to the address configured in TF-A (currently 0x60000000).
>
> To avoid this poorly documented adventure, we enable a position
> independent build, and also let the flash regions be always detected
> through the DTB. This results in a single build to work under both
> scenarios, and also allows to move the BL33 load address in TF-A to
> something lower in the future.
>
> For this to work, we have to first make PIE work when booted from ROM.
> While writing to ROM should not hurt, it might trigger CFI flash
> sequences, and indeed crashes for me in the middle of the fixup routine.
> This is covered by patch 2/6, which skips the whole fixup routine if the
> offset is actually 0 (as it is in our case). To support older toolchains
> (including the popular Linaro builds), we need to ensure we do the
> static RELA fixups, even with PIE enabled (patch 1/6).
> Also we have to decouple the relative initial stack pointer from the
> PIE option, as we always need to use the fixed version, pointing to
> RAM (patch 3/6).
> Patch 4/6 drops the hard-coded flash address, instead U-Boot can already
> read all required information from QEMU's DTB.
> Patch 5/6 is a cleanup, while the last patch enables the PIE build.
>
> With this series the very same u-boot.bin file works when directly loaded
> from the QEMU command line (-bios), but also when embedded into TF-A's
> fip.bin, removing the need for case-specific build options.
>
> Please have a look!
Can you please also update doc/board/emulation/qemu-arm.rst with
instructions / example of using this configuration? Thanks!
--
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 659 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20200930/ac3f1c5b/attachment.sig>
prev parent reply other threads:[~2020-09-30 17:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 16:39 [PATCH v2 0/6] qemu-arm64: Allow booting via Trusted Firmware Andre Przywara
2020-09-30 16:39 ` [PATCH v2 1/6] arm64: PIE: Do not skip static relocation Andre Przywara
2020-09-30 17:11 ` Stephen Warren
2020-10-01 8:33 ` Amit Tomar
2020-10-09 13:02 ` Tom Rini
2020-09-30 16:39 ` [PATCH v2 2/6] arm64: PIE: Skip fixups if distance is zero Andre Przywara
2020-10-09 13:02 ` Tom Rini
2020-09-30 16:39 ` [PATCH v2 3/6] arm64: PIE: Allow fixed stack pointer Andre Przywara
2020-10-09 13:02 ` Tom Rini
2020-09-30 16:39 ` [PATCH v2 4/6] qemu-arm: Remove need to specify flash banks Andre Przywara
2020-10-09 13:02 ` Tom Rini
2020-09-30 16:39 ` [PATCH v2 5/6] qemu-arm: Drop ARCH_SUPPORT_TFABOOT Andre Przywara
2020-09-30 17:40 ` Tom Rini
2020-10-09 13:02 ` Tom Rini
2020-09-30 16:39 ` [PATCH v2 6/6] qemu-arm64: Enable POSITION_INDEPENDENT Andre Przywara
2020-10-09 13:03 ` Tom Rini
2020-09-30 17:39 ` Tom Rini [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200930173958.GG14816@bill-the-cat \
--to=trini@konsulko.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox