Re: [PATCH 2/2] virtio reset support

Anthony Liguori wrote:

Avi Kivity wrote:

quoted

Anthony Liguori wrote:

quoted

PCI-e has a common reset concept (warm and cold).  I've been looking 
around and I can't seem to find any common reset mechanism for PCI.  
Is FLR something that is per-device or a standard PCI mechanism?  If 
it's the former, than we've basically implemented FLR using this bit 
in the config space.

I believe it is a standard mechanism, albeit new, so perhaps many 
devices don't implement it.

I don't have a copy of the PCI specification handy.  Can you dig up 
how it's implemented?  I don't see any references in my local 
documentation and I couldn't find anything in Linux that referenced it 
at the PCI level.

I think it's NDA material, so even if I found it, I couldn't publish 
it.  It can probably be reverse-engineered from the Xen patches, or 
perhaps your employer is a PCI-SIG member so you can get access to it.

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