Finally, I figured out the root cause of this issue. It happened when I changed the mac address of the virtio net probed for the vm guest. According to the issue, It seemed that the virtio_net driver of the libsel4vmmsupport did not support emulating the io control for changing the mac addess of the virtio net in the guest.

发件人: Tao Heng 陶恒-SW 发送时间: 2022年3月9日 14:49 收件人: 'devel@sel4.systems' devel@sel4.systems 主题: Sel4 VMM Virtio Net Related Porting on Other SOC

Hi everyone ,

Background:

I was porting vm_virtio_net project on other platforms with Cortex-A55. I met a run error with :

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Unhandled offset of 0x14 of size 1, writing 0x2

Assertion failed: !"panic" (/home/kuang/workspace/penoy/system/core/seL4_projects_libs/seL4_projects_libs/libsel4vmmplatsupport/src/drivers/virtio_emul.c: emul_io_out: 109)

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While it ran well on qemu with linux kernel version 4.9.189, my linux kernel version for the SOC is 4.14.61. If I replaced the qemu linux kernel with my kernel, the vm_virtio_net project also ran well on the qemu platform.

To my analyzation, your virtio_net driver should be able to support for my platform. Is this related to my dts configuration for PCI node?

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