[Xen-devel][VTD][RESEND]add a timer for the shared interrupt issue for vt-d

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

Keir,

It’s a resending patch for the timeout mechanism to deal with the shared interrupt issue for vt-d enabled hvm guest.

We modify the patch following your comments last time and make some other small fix:

1)       We don’t touch the locking around the hvm_dpci_eoi().

2)       Remove the HZ from the TIME_OUT_PERIOD macro which may confuse others.

3)       Add some explanation to the return value for the hvm_pci_intx_assert(), and the has_timer parameter for the hvm_dpci_eoi.

We have tested it with shared interrupt between dom0/HVM(pcie/disk) and HVM/HVM(pcie/pcie).

 

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

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

 

 

Attachment: timeout-2.diff
Description: timeout-2.diff

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