Re: [PATCH v5 06/14] iommufd: Add IOMMUFD_OBJ_VEVENTQ and IOMMUFD_CMD_VEVENTQ_ALLOC

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On Sun, Jan 12, 2025 at 08:51:25PM -0800, Nicolin Chen wrote:

> We will still have the fault queue:
> 	if (error is handled by PRI)
> 		report via fault queue; // need response

This is an important point, we can't generate a response for the PRI
unless the fault queue is used, so even though the vEVENTQ could carry
the PRI event, it must not be done. If there is no fault handle
available the kernel must NAK the PRI event internally, never send it
to the vEVENTQ.

Jason




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