On Mon, 2020-12-14 at 10:24 +0900, Ryutaroh Matsumoto wrote: Hi Ben, thanks again for your response.
> We used to provide a 'versatile' flavour on armel, for the ARM > > Versatile boards that QEMU has supported for a long time. I removed > > this flavour back in 2016 after finding that it had been broken for a > > while and no-one had reported it. Adding that back might be an option, > > if the Raspberry Pi device emulation in QEMU is slow. What do you > think? If nobody uses linux-image-versatile now, I don't want to request the kernel team to revive it. It may/might increase the maintainance effort... It will, though probably not very much. The minimum requirements by autopkgtest-virt-qemu are * VM has at least two serial ports, * the Linux kernel has a driver for them, and * the Linux kernel has a driver for a storage attached to the VM. On the other hand, RPi series has only one serial port by PL011. So we need to attach another serial port to the VM. For armhf, arm64, and ppc64el, I was advised to use virtconsole by Simon McVittie, and it has worked fine as far as I see. But linux-image-rpi does not have the virtio driver, this option cannot be used (at least for now). Can you try adding it? You should be able to cross-build the kernel package quite easily if you use the profiles "cross,pkg.linux.notools". There are generic instructions at <https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s-common-official>. [...] > The usual practice is to use u-boot or some other board-specific boot > loader, which can be configured by the flash-kernel package. I don't > think that works in QEMU. I have not intensively investigated if we can boot linux-image-marvell by qemu-system-arm and some u-boot Debian package... I will see it within several days and report it back here. First I will see u-boot-qemu Debian package and the qemu "virt" machine can boot linux-image-marvell as suggested at https://github.com/ARM-software/u-boot/blob/master/doc/README.qemu-arm It won't - it has very different hardware. Even the CPU will be incompatible (ARMv7 whereas marvell is built for v5). Ben. linux-image-marvell seems capable of handling PCI serial ports. Storage options for QEMU VM seems only "ich9-ahci" and "sdhci-pci"... Best regards, Ryutaroh -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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