Re: [PATCH] iommu/vt-d: Flush old iotlb for kdump when the device gets context mapped

[Joerg Roedel]

On Thu, Nov 17, 2016 at 10:47:28AM +0800, Xunlei Pang wrote:
> As per the comment, the code here only needs to flush context caches
> for the special domain 0 which is used to tag the
> non-present/erroneous caches, seems we should flush the old domain id
> of present entries for kdump according to the analysis, other than the
> new-allocated domain id. Let me ponder more on this.

Flushing the context entry only is fine. The old domain-id will not be
re-used anyway, so there is no point in reading it out of the context
table and flush it.

Also, please add a Fixes-tag when you re-post this patch.


	Joerg