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[Qemu-devel] [Bug 1797262] Re: qemu arm no longer able to boot RPI Kerne
[Qemu-devel] [Bug 1797262] Re: qemu arm no longer able to boot RPI Kernels
Mon, 08 Jul 2019 16:48:28 -0000
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qemu arm no longer able to boot RPI Kernels
Status in QEMU:
Since RPi Kernel 1.20170427, qemu is no longer able to emulate the
Rasberry Pi, as the linux kernel is complaining about timing issues.
Old kernel output - https://pastebin.com/wvkneNNF
New kernel output - https://pastebin.com/QTwgCkV2
Note that the actual error is caused by the kernel being unable to get
the timing source for the mmc (Line 160), which causes an unable-to-
mount-root panic. There are other issues with the serial port
returning an invalid speed, which displays a divide-by-zero error,
which is PROBABLY a symptom of the same root cause.
This is simple to replicate - The last working kernel is available
Download kernel7 and the dtb, and try to boot with (for example)
qemu-system-aarch64 -M raspi2 -kernel kernel7.img -dtb
bcm2709-rpi-2-b.dtb -serial stdio -sd noobs.img -append
This works, and boots successfully.
However, if you replace the kernel7.img and dtb with ones taken from
https://github.com/raspberrypi/firmware/tree/1.20170427/boot it will
NOT boot because of various clock timing issues (as in the second
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Philippe Mathieu-Daudé <=