[Xen-devel] Re: [PATCH] VT-d: IOTLB flush fixups

["Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx>]

> On map: only flush when old PTE was valid or invalid PTE may be cached.
> On unmap: always flush old entry, but skip flush for unaffected IOMMUs.
> 
> Signed-off-by: Espen Skoglund <espen.skoglund@xxxxxxxxxxxxx>
> 
> --
>  iommu.c |   17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
> --

Seems my last mail sent to the xen-devel is lost and I have no local
copy so I have to write again...

Espen,
Thanks for the patch! I also noticed context/iotlb flush need a cleanup.
As flush of present/non-present entry are different, your change to
iommu_intel_map_page are not that correct. So I made up anther patch.
iommu_flush is also removed, as VTd table is not shared with p2m any
more.

Signed-off-by: Xiaowei Yang <xiaowei.yang@xxxxxxxxx>

Thanks,
Xiaowei

Attachment: flush.diff
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