diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2021-07-09 14:30:01 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-07-09 14:30:01 +0100 |
| commit | 05de778b5b8ab0b402996769117b88c7ea5c7c61 (patch) | |
| tree | 85d2ddee331129bee4ef4b9e357c0b6086ad6287 /hw/block | |
| parent | 53c0123118a15cd25fe81acfa9617ddcbb9258fe (diff) | |
| parent | e3e01466bff42b5ea977340d8d7d90df482b0c97 (diff) | |
| download | qemu-05de778b5b8ab0b402996769117b88c7ea5c7c61.zip qemu-05de778b5b8ab0b402996769117b88c7ea5c7c61.tar.gz qemu-05de778b5b8ab0b402996769117b88c7ea5c7c61.tar.bz2 | |
Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
pc,pci,virtio: bugfixes, improvements
vhost-user-rng support.
Fixes all over the place.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Wed 07 Jul 2021 14:29:30 BST
# gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469
* remotes/mst/tags/for_upstream:
MAINTAINERS: Add maintainer for vhost-user RNG implementation
docs: add slot when adding new PCIe root port
acpi/ged: fix reset cause
tests: acpi: pc: update expected DSDT blobs
acpi: pc: revert back to v5.2 PCI slot enumeration
tests: acpi: prepare for changing DSDT tables
migration: failover: reset partially_hotplugged
virtio-pci: Changed return values for "notify", "device" and "isr" read.
virtio-pci: Added check for virtio device in PCI config cbs.
virtio-pci: Added check for virtio device presence in mm callbacks.
hw/pci-host/q35: Ignore write of reserved PCIEXBAR LENGTH field
virtio: Clarify MR transaction optimization
virtio: disable ioeventfd for record/replay
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/dataplane/virtio-blk.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c index cd81893..252c3a7 100644 --- a/hw/block/dataplane/virtio-blk.c +++ b/hw/block/dataplane/virtio-blk.c @@ -198,6 +198,10 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev) goto fail_guest_notifiers; } + /* + * Batch all the host notifiers in a single transaction to avoid + * quadratic time complexity in address_space_update_ioeventfds(). + */ memory_region_transaction_begin(); /* Set up virtqueue notify */ @@ -211,6 +215,10 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev) virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false); } + /* + * The transaction expects the ioeventfds to be open when it + * commits. Do it now, before the cleanup loop. + */ memory_region_transaction_commit(); while (j--) { @@ -330,12 +338,20 @@ void virtio_blk_data_plane_stop(VirtIODevice *vdev) aio_context_release(s->ctx); + /* + * Batch all the host notifiers in a single transaction to avoid + * quadratic time complexity in address_space_update_ioeventfds(). + */ memory_region_transaction_begin(); for (i = 0; i < nvqs; i++) { virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false); } + /* + * The transaction expects the ioeventfds to be open when it + * commits. Do it now, before the cleanup loop. + */ memory_region_transaction_commit(); for (i = 0; i < nvqs; i++) { |