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| author | Peter Xu <peterx@redhat.com> | 2017-04-07 18:59:15 +0800 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2017-04-20 15:22:41 -0300 |
| commit | dd4d607e40dcd2cb7646b510504880a70939d91b (patch) | |
| tree | 202101a219f01aab952a79e8ac0d75f295da75be /hw/core/null-machine.c | |
| parent | 558e0024a428a8f21605dc8aa026612ccc0f14cd (diff) | |
intel_iommu: enable remote IOTLB
This patch is based on Aviv Ben-David (<bd.aviv@gmail.com>)'s patch
upstream:
"IOMMU: enable intel_iommu map and unmap notifiers"
https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html
However I removed/fixed some content, and added my own codes.
Instead of translate() every page for iotlb invalidations (which is
slower), we walk the pages when needed and notify in a hook function.
This patch enables vfio devices for VT-d emulation.
And, since we already have vhost DMAR support via device-iotlb, a
natural benefit that this patch brings is that vt-d enabled vhost can
live even without ATS capability now. Though more tests are needed.
Signed-off-by: Aviv Ben-David <bdaviv@cs.technion.ac.il>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-10-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'hw/core/null-machine.c')
0 files changed, 0 insertions, 0 deletions