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| author | Alex Williamson | 2018-06-05 16:23:17 +0200 |
|---|---|---|
| committer | Alex Williamson | 2018-06-05 16:28:09 +0200 |
| commit | 2b1dbd0d7250254e9421bce721cc2ea25b4af894 (patch) | |
| tree | 6c87213262cef00382fb8b444bce436bf735ca0e /linux-headers/linux | |
| parent | vfio/quirks: ioeventfd quirk acceleration (diff) | |
| download | qemu-2b1dbd0d7250254e9421bce721cc2ea25b4af894.tar.gz qemu-2b1dbd0d7250254e9421bce721cc2ea25b4af894.tar.xz qemu-2b1dbd0d7250254e9421bce721cc2ea25b4af894.zip | |
vfio/quirks: Enable ioeventfd quirks to be handled by vfio directly
With vfio ioeventfd support, we can program vfio-pci to perform a
specified BAR write when an eventfd is triggered. This allows the
KVM ioeventfd to be wired directly to vfio-pci, entirely avoiding
userspace handling for these events. On the same micro-benchmark
where the ioeventfd got us to almost 90% of performance versus
disabling the GeForce quirks, this gets us to within 95%.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'linux-headers/linux')
0 files changed, 0 insertions, 0 deletions