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Is the ppc440 "bamboo" board in QEMU still of any use?


From: Thomas Huth
Subject: Is the ppc440 "bamboo" board in QEMU still of any use?
Date: Thu, 14 Oct 2021 11:31:57 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0


 Hi,

I tried to build a current Linux kernel for the "bamboo" board and use it in QEMU, but QEMU then quickly aborts with:

 pci.c:262: pci_bus_change_irq_level: Assertion `irq_num >= 0' failed.

(or with a "DCR write error" if I try to use the cuImage instead).

I googled a little bit and found this discussion:

https://qemu-devel.nongnu.narkive.com/vYHona3u/emulating-powerpc-440ep-with-qemu-system-ppcemb#post2

Seems like this board was used for KVM on the PPC440 only, and has never been enabled with the TCG emulation?

Well, KVM support on the 440 has been removed years ago already:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b2677b8dd8de0dc1496ede4da09b9dfd59f15cea

So is this "bamboo" board dead code in QEMU now? Or does anybody still have a kernel binary which could be used for testing it? Note: This board does not support "-bios", so u-boot or other firmwares are certainly also not an option here...
Should we mark "bamboo" as deprecated nowadays?

 Thomas




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