[Xen-devel] [VTD][PATCH] a time out mechanism for the shared interrupt issue for vtd

["Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx>]

Attached is a patch for shared interrupt between dom0 and HVM domain for vtd.

Most of problem is caused by that we should inject interrupt to both domains and the

physical interrupt deassertion then may be delayed by the device assigned to the HVM.

 

The patch adds a timer, and the time out value is sufficient large to tolerant

the delaying used to wait for the physical interrupt deassertion.

 

The patch works well with the situation that SATA disk shares interrupt with PCIe NIC.

And for vtd=1, the ioapic_ack=new method also works well.

 

Signed-off-by: Xin, Xiaohui<xiaohui.xin@xxxxxxxxx

Signed-off-by: Kevin Tian <kevin.tian@xxxxxxxxx>

 

 

 

Attachment: timeout.patch
Description: timeout.patch

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