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| author | Michael S. Tsirkin | 2012-12-24 16:35:27 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin | 2013-01-07 18:42:23 +0100 |
| commit | f1d0f15a6d46bd47e7658e44a004c8898c8cb91e (patch) | |
| tree | d660f5f1ae105ade8db5eb39fa52677990a6e8a5 /hw/pci/pci.h | |
| parent | virtio-pci: cache msix messages (diff) | |
| download | qemu-f1d0f15a6d46bd47e7658e44a004c8898c8cb91e.tar.gz qemu-f1d0f15a6d46bd47e7658e44a004c8898c8cb91e.tar.xz qemu-f1d0f15a6d46bd47e7658e44a004c8898c8cb91e.zip | |
virtio: backend virtqueue notifier masking
some backends (notably vhost) can mask events
at their source in a way that is more efficient
than masking through kvm.
Specifically
- masking in kvm uses rcu write side so it has high latency
- in kvm on unmask we always send an interrupt
masking at source does not have these issues.
Add such support in virtio.h and use in virtio-pci.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pci/pci.h')
0 files changed, 0 insertions, 0 deletions