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| author | Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru> | 2021-05-17 16:06:28 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-07-02 10:20:13 -0400 |
| commit | 3909c079454a49b113c60a5cd91d749f78ca1c7f (patch) | |
| tree | a2296c33fb1fb171423125c89e9ac388993ca818 /hw/virtio/virtio-pci.c | |
| parent | 9c2647f75004c4f7d64c9c0ec55f8c6f0739a8b1 (diff) | |
| download | focaccia-qemu-3909c079454a49b113c60a5cd91d749f78ca1c7f.tar.gz focaccia-qemu-3909c079454a49b113c60a5cd91d749f78ca1c7f.zip | |
virtio: disable ioeventfd for record/replay
virtio devices support separate iothreads waiting for events from file descriptors. These are asynchronous events that can't be recorded and replayed, therefore this patch disables ioeventfd for all devices when record or replay is enabled. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru> Message-Id: <162125678869.1252810.4317416444097392406.stgit@pasha-ThinkPad-X280> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio/virtio-pci.c')
| -rw-r--r-- | hw/virtio/virtio-pci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index b321604d9b..f1e105fa52 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -37,6 +37,7 @@ #include "qemu/range.h" #include "hw/virtio/virtio-bus.h" #include "qapi/visitor.h" +#include "sysemu/replay.h" #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev)) @@ -1760,6 +1761,11 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } + /* fd-based ioevents can't be synchronized in record/replay */ + if (replay_mode != REPLAY_MODE_NONE) { + proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; + } + /* * virtio pci bar layout used by default. * subclasses can re-arrange things if needed. |