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u-boot: disable CONFIG_BLOBLIST on genericarm64 and qemuarm64

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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>
(From OE-Core rev: c5fa4320e666a0606b18be8f0a08e659170568f2)

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mikko Rapeli 2025-06-03 15:29:36 +03:00 committed by Richard Purdie
parent bcfe285bb1
commit 953cb7b0c2
2 changed files with 5 additions and 0 deletions
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1
meta/recipes-bsp/u-boot/files/disable-CONFIG_BLOBLIST.cfg Normal file
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@ -0,0 +1 @@
# CONFIG_BLOBLIST is not set

4
meta/recipes-bsp/u-boot/u-boot-common.inc
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@ -16,6 +16,10 @@ SRCREV = "34820924edbc4ec7803eb89d9852f4b870fa760a"
SRC_URI = "git://source.denx.de/u-boot/u-boot.git;protocol=https;branch=master;tag=v${PV}"
# workaround for aarch64 kvm qemu boot regression
SRC_URI:append:qemuarm64 = " file://disable-CONFIG_BLOBLIST.cfg"
SRC_URI:append:genericarm64 = " file://disable-CONFIG_BLOBLIST.cfg"
S = "${WORKDIR}/git"
B = "${WORKDIR}/build"