Hi Jan,
On 26/02/2021 13:30, Jan Beulich wrote:
On 26.02.2021 11:56, Julien Grall wrote:
From: Julien Grall <jgr...@amazon.com>
The new x86 IOMMU page-tables allocator will release the pages when
relinquishing the domain resources. However, this is not sufficient
when the domain is dying because nothing prevents page-table to be
allocated.
As the domain is dying, it is not necessary to continue to modify the
IOMMU page-tables as they are going to be destroyed soon.
At the moment, page-table allocates will only happen when iommu_map().
So after this change there will be no more page-table allocation
happening because we don't use superpage mappings yet when not sharing
page tables.
In order to observe d->is_dying correctly, we need to rely on per-arch
locking, so the check to ignore IOMMU mapping is added on the per-driver
map_page() callback.
Signed-off-by: Julien Grall <jgr...@amazon.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
Thanks!
Does this also want a Fixes: tag (the same as patch 1)?
I think so. I will add it when committing the series.
Cheers,
--
Julien Grall
