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pc,pci,virtio: bugfixes, improvements

Browse source 
Fixes all over the place. Faster boot for virtio. ioeventfd support for
 mmio.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,pci,virtio: bugfixes, improvements

Fixes all over the place. Faster boot for virtio. ioeventfd support for
mmio.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Fri 14 May 2021 15:27:13 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:
  Fix build with 64 bits time_t
  vhost-vdpa: Make vhost_vdpa_get_device_id() static
  hw/virtio: enable ioeventfd configuring for mmio
  hw/smbios: support for type 41 (onboard devices extended information)
  checkpatch: Fix use of uninitialized value
  virtio-scsi: Configure all host notifiers in a single MR transaction
  virtio-scsi: Set host notifiers and callbacks separately
  virtio-blk: Configure all host notifiers in a single MR transaction
  virtio-blk: Fix rollback path in virtio_blk_data_plane_start()
  pc-dimm: remove unnecessary get_vmstate_memory_region() method
  amd_iommu: fix wrong MMIO operations
  virtio-net: Constify VirtIOFeature feature_sizes[]
  virtio-blk: Constify VirtIOFeature feature_sizes[]
  hw/virtio: Pass virtio_feature_get_config_size() a const argument
  x86: acpi: use offset instead of pointer when using build_header()
  amd_iommu: Fix pte_override_page_mask()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

# Conflicts:
#	hw/arm/virt.c
This commit is contained in:
Peter Maydell 2021-05-16 17:22:46 +01:00
commit 6005ee07c3
23 changed files with 311 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

36
hw/block/dataplane/virtio-blk.c
View file

@ -198,19 +198,30 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
goto fail_guest_notifiers;
}
memory_region_transaction_begin();
/* Set up virtqueue notify */
for (i = 0; i < nvqs; i++) {
r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, true);
if (r != 0) {
int j = i;
fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
while (i--) {
virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
}
memory_region_transaction_commit();
while (j--) {
virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
}
goto fail_guest_notifiers;
goto fail_host_notifiers;
}
}
memory_region_transaction_commit();
s->starting = false;
vblk->dataplane_started = true;
trace_virtio_blk_data_plane_start(s);
@ -221,7 +232,7 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
aio_context_release(old_context);
if (r < 0) {
error_report_err(local_err);
goto fail_guest_notifiers;
goto fail_aio_context;
}
/* Process queued requests before the ones in vring */
@ -245,6 +256,20 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
aio_context_release(s->ctx);
return 0;
fail_aio_context:
memory_region_transaction_begin();
for (i = 0; i < nvqs; i++) {
virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
}
memory_region_transaction_commit();
for (i = 0; i < nvqs; i++) {
virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
}
fail_host_notifiers:
k->set_guest_notifiers(qbus->parent, nvqs, false);
fail_guest_notifiers:
/*
* If we failed to set up the guest notifiers queued requests will be
@ -305,8 +330,15 @@ void virtio_blk_data_plane_stop(VirtIODevice *vdev)
aio_context_release(s->ctx);
memory_region_transaction_begin();
for (i = 0; i < nvqs; i++) {
virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
}
memory_region_transaction_commit();
for (i = 0; i < nvqs; i++) {
virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
}

2
hw/block/virtio-blk.c
View file

@ -40,7 +40,7 @@
* Starting from the discard feature, we can use this array to properly
* set the config size depending on the features enabled.
*/
static VirtIOFeature feature_sizes[] = {
static const VirtIOFeature feature_sizes[] = {
{.flags = 1ULL << VIRTIO_BLK_F_DISCARD,
.end = endof(struct virtio_blk_config, discard_sector_alignment)},
{.flags = 1ULL << VIRTIO_BLK_F_WRITE_ZEROES,