On 5/15/24 4:37 PM, Tian, Kevin wrote:
+
+ iopf_group_response(group, response.code);
PCIe spec states that a response failure disables the PRI interface. For SR-IOV
it'd be dangerous allowing user to trigger such code to VF to close the entire
shared PRI interface.
Just another example lacking of coordination for shared capabilities between
PF/VF. But exposing such gap to userspace makes it worse.
Yes. You are right.
I guess we don't want to make this work depending on that cleanup. The
minimal correct thing is to disallow attaching VF to a fault-capable hwpt
with a note here that once we turn on support for VF the response failure
code should not be forwarded to the hardware. Instead it's an indication
that the user cannot serve more requests and such situation waits for
a vPRI reset to recover.
Is it the same thing to disallow PRI for VF in IOMMUFD?
Best regards,
baolu
