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

[Tom Rini <trini@konsulko.com>]

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On Wed, May 28, 2025 at 09:40:59AM +0300, Mikko Rapeli wrote:
> 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.

Do you have a known good version where it does work? I assume it's
v2025.01 that does work, and an OE-specific revert of commit
53d5a221632e ("emulation: Use bloblist to hold tables") with appropriate
status tags about it being discussed upstream would make the most sense.

-- 
Tom

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