Re: [RFC] ARM/ARM64: KVM: Implement KVM_FLUSH_DCACHE_GPA ioctl

Paolo Bonzini
2015-05-07T16:52:58Z

On 07/05/2015 18:56, Jérémy Fanguède wrote:
> USB devices fail with a timeout error, as if the communication between
> the kernel and the devices fail at a certain point:
> usb 1-1: device not accepting address 5, error -110
> usb usb1-port1: unable to enumerate USB device
>
> e1000 fails when the userspace tries to use it, with these type of
> kernel messages:
> e1000 0000:00:02.0 eth0: Detected Tx Unit Hang
> Tx Queue <0>
> TDH <d>
> TDT <d>
> next_to_use <d>
> next_to_clean <9>
> buffer_info[next_to_clean]
> time_stamp <ffff9311>
> next_to_watch
> jiffies <ffff956a>
> next_to_watch.status <0>

Can you find out what memory attributes the guest is using for the
memory---and if it's uncached, why?

Paolo
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