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Re: [Qemu-devel] AVMF & OVMF blobs in QEMU tree???
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] AVMF & OVMF blobs in QEMU tree??? |
Date: |
Thu, 24 Aug 2017 15:49:55 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 |
On 08/24/17 12:55, Gerd Hoffmann wrote:
> Hi,
>
>> Having all our precompiled blobs be in a submodule would
>> maybe be handy for properly keeping them separate from the
>> QEMU code -- would that be useful for downstream distro
>> packagers?
>
> I like the clear separation.
>
> Also you don't have to fetch the firmware submodule if you don't need
> the prebuilds.
>
> It would be a good opportunity to cleanup the mess we have in pc-bios/
> right now.
>
> Clear disadvantage is that firmware updates will become more
> complicated then as two repos must be updated. So either two pull
> requests per firmware update, or write access to the firmware binary
> repo for all firmware maintainers.
>
> Or maybe make the firmware sources submodules of the firmware binary
> repo instead of the qemu repo.
>
>> In any case this seems like a good opportunity to write down
>> exactly what our policy about ROM blobs is (eg where they
>> are, how we update them, requirement for source, whether
>> we allow source to be in a submodule not on qemu.org...)
>
> Tried to write down the current state.
>
> cheers,
> Gerd
>
> ---------------------- docs/firmware.txt ------------------------
>
> prebuilt firmware in qemu
> =========================
>
> The process of building firmware isn't as easy as building qemu
> itself, for example because you must have cross compilers installed
> when building firmware for other architectures. So qemu ships
> prebuilt firmware binaries for convenience reasons.
>
>
> directories
> -----------
>
> pc-bios/
> Firmware binaries.
> Also other files like keymaps and logos which are copied to
> $prefix/share/qemu by "make install".
>
> pc-bios/optionrom/
> Firmware sources, part of the qemu project.
>
> roms/
> Firmware sources, third-party projects, as git submodules.
>
>
> third-party git repos
> ---------------------
>
> For third party firmware sources it is recommended to have a git
> mirror on git.qemu.org. In case the firmware license is GPL the git
> mirror is mandatory for GPL compilance reasons: We ship binaries, so
> we must provide sources too.
>
>
> building the firmware
> ---------------------
>
> Firmware builds should be done using rules in roms/Makefile. That
> serves as documentation how the firmware is built, and it also makes
> firmware updates easier for the maintainer.
>
> "make -C roms" prints a list of firmware build targets.
> "make -C roms $target" kicks a build.
>
>
> notes for specific firmwares
> ----------------------------
>
> ipxe: see https://wiki.qemu.org/IpxeDownstreamForQemu
>
Looks good to me!
Reviewed-by: Laszlo Ersek <address@hidden>
Thanks
Laszlo