Re: [EXTERNAL] [PATCH RFC 2/2] PCI: hv: Add vPCI device reset support

On Thu, Aug 13, 2026 at 09:40:48PM +0000, Long Li wrote:
> 
> 
> > -----Original Message-----
> > From: [email protected] <[email protected]>
> > Sent: Friday, July 24, 2026 4:09 PM
> > To: Linux on Hyper-V List <[email protected]>; linux-
> > [email protected]
> > Cc: Wei Liu <[email protected]>; KY Srinivasan <[email protected]>;
> > Haiyang Zhang <[email protected]>; Dexuan Cui
> > <[email protected]>; Long Li <[email protected]>; Jonathan Corbet
> > <[email protected]>; Shuah Khan <[email protected]>; Lorenzo
> > Pieralisi <[email protected]>; Krzysztof Wilczyński
> > <[email protected]>; Manivannan Sadhasivam <[email protected]>; Rob
> > Herring <[email protected]>; Bjorn Helgaas <[email protected]>; open
> > list:DOCUMENTATION <[email protected]>; open list <linux-
> > [email protected]>
> > Subject: [EXTERNAL] [PATCH RFC 2/2] PCI: hv: Add vPCI device reset support
> > 
> > From: Wei Liu <[email protected]>
> > 
> > Hyper-V vPCI protocol version 1.5 adds a RESET_DEVICE request for projected
> > PCI functions. Negotiate the new protocol version and issue the request
> > through the vPCI VMBus channel from the PCI controller reset callback.
> > 
> > Use the existing VMBus response path. Return -ENOTTY when the host
> > reports STATUS_NOT_SUPPORTED so PCI core may try another reset method.
> > 
> > Signed-off-by: Wei Liu <[email protected]>
> 
> Reviewed-by: Long Li <[email protected]>

Thanks for the review!

I still need to find some copious free time to test the new hook
suggested in patch one.

I don't think changes in patch 1 will result in major changes in this
patch, so I intend to retain this tag when I post next time.

Thanks,
Wei