Gregory Haskins wrote:

Avi Kivity wrote:
  

quoted

Gregory Haskins wrote:
    

quoted

We need a way to detect if a VM is reset later in the series, so lets
add a capability for userspace to signal a VM reset down to the kernel.
  
      

How do you handle the case of a guest calling kexec to load a new
kernel?  Or is that not important for your use case?

    

Hmm..I had not considered this.  Any suggestions on ways to detect it?

  

Best would be not to detect it; it's tying global events into a device.  
Instead, have a reset command for your device and have the driver issue 
it on load and unload.

btw, reset itself would be better controlled from userspace; qemu knows 
about resets and can reset vbus devices directly instead of relying on 
kvm to reset them.  This decouples the two code bases a bit.  This is 
what virtio does.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.