Re: [PATCH v4 1/4] u-boot: disable CONFIG_BLOBLIST on genericarm64 and qemuarm64

[Mikko Rapeli <mikko.rapeli@linaro.org>]

Hi,

On Tue, May 27, 2025 at 06:51:33PM -0600, Tom Rini wrote:
> On Mon, May 26, 2025 at 11:35:44AM +0300, Mikko Rapeli wrote:
> 
> > Booting u-boot on qemu with kvm is currently hanging on aarch64
> > build host. Root cause is in u-boot and CONFIG_BLOBLIST can be
> > disabled as a workaround.
> > 
> > To reproduce, build on kvm enabled host where "kvm-ok"
> > succeeds. For example genericarm64 machine and core-image-base
> > should then boot with:
> > 
> > $ runqemu slirp nographic novga snapshot kvm
> > 
> > On qemuarm64, default kvm setup will boot directly to kernel
> > and is not affected by this. If build enables u-boot as bios
> > then the same issue happens.
> > 
> > Without this config workaround, the boot hangs without
> > any messages in qemu output but ctrl-a-c to qemu console
> > can shutdown the emulated machine.
> > 
> > This seems to have regressed after u-boot 2025.04 update.
> > KVM boot can be detected from speed, for example genericarm64
> > boots in 550 ms with KVM and without in over 5 seconds.
> > 
> > Fixes: [YOCTO #15872]
> > 
> > Upstream u-boot discussion:
> > https://lists.denx.de/pipermail/u-boot/2025-May/590101.html
> > 
> > Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
> > Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
> 
> I think it's a tad early to disable this. On the U-Boot side, it's being
> looked in to. In fact, you're saying v2025.04 is working (current
> release) and v2025.07-rcX is failing. At this point in the U-Boot cycle
> I think we'll figure out the problem and fix it. If we can't figure out
> how to keep all the use cases working for v2025.07 then disabling
> BLOBLIST here in OE can be thought on, I would expect. Thanks.

2025.04 is affected by this. My wording for this is not accurate enough, sorry.

We have a workaround for qemuarm64 and generiarm64 for testing use cases
with disabling BLOBLIST so we might as well use it since there does
not seem to be any downsides to it in testing.

Cheers,

-Mikko