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| author | Jason Wang | 2020-09-09 10:17:31 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2020-10-30 11:48:53 +0100 |
| commit | 4c70875372b821b045e84f462466a5c04b091ef5 (patch) | |
| tree | d5f444fbfcfee87a03806f240f1222caa310f426 /hw/display/omap_dss.c | |
| parent | pc: Implement -no-hpet as sugar for -machine hpet=on (diff) | |
| download | qemu-4c70875372b821b045e84f462466a5c04b091ef5.tar.gz qemu-4c70875372b821b045e84f462466a5c04b091ef5.tar.xz qemu-4c70875372b821b045e84f462466a5c04b091ef5.zip | |
pci: advertise a page aligned ATS
After Linux kernel commit 61363c1474b1 ("iommu/vt-d: Enable ATS only
if the device uses page aligned address."), ATS will be only enabled
if device advertises a page aligned request.
Unfortunately, vhost-net is the only user and we don't advertise the
aligned request capability in the past since both vhost IOTLB and
address_space_get_iotlb_entry() can support non page aligned request.
Though it's not clear that if the above kernel commit makes
sense. Let's advertise a page aligned ATS here to make vhost device
IOTLB work with Intel IOMMU again.
Note that in the future we may extend pcie_ats_init() to accept
parameters like queue depth and page alignment.
Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20200909081731.24688-1-jasowang@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/display/omap_dss.c')
0 files changed, 0 insertions, 0 deletions