在 2022/12/27 17:31, Michael S. Tsirkin 写道:
On Tue, Dec 27, 2022 at 05:17:20PM +0800, Jason Wang wrote:
In particular, we will also directly break the device.
It's kind of hardening for malicious devices.
ATM no amount of hardening can prevent a malicious hypervisor from
blocking the guest. Recovering when a hardware device is broken would be
nice but I think if we do bother then we should try harder to recover,
such as by driving device reset.
Probably, but as discussed in another thread, it needs co-operation in the
upper layer (networking core).
To track all state? Yea, maybe. For sure it's doable just in virtio,
but if you can find 1-2 other drivers that do this internally
then factoring this out to net core will likely be accepted.
One thing that might be useful is to reuse tx_timeout() but current
virtio-net doesn't do more than a simple warning (other drivers may try
to reset).
So I would leave it for future investigation.
Thanks
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