diff options
author | Jason Wang <jasowang@redhat.com> | 2015-06-04 12:34:30 +0200 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2015-06-10 18:15:05 +0200 |
commit | 975acc0ae6d60260859884a9235ae3c62e2969a2 (patch) | |
tree | 14d90d3235c1492b3111c1d35eea24832551ee98 /hw | |
parent | 4e93a68eb369b2f7adbef7a4f6afd7a30a0ed927 (diff) |
virtio-pci: correctly set host notifiers for modern bar
Currently, during host notifier set. We only add eventfd for legacy
bar, this is not correct since:
- Non-transitional device does not have legacy bar, so qemu will crash
since proxy->bar was not initialized.
- Modern device uses modern bar and notify cap to notify the device,
we should add eventfd for proxy->notify.
So this patch fixes the above two issues by adding eventfd based on
whether legacy or modern device were supported.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/virtio/virtio-pci.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 7804361ecc..b7beddd6c1 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -135,12 +135,21 @@ static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) return 0; } +#define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 + static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, int n, bool assign, bool set_handler) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, n); EventNotifier *notifier = virtio_queue_get_host_notifier(vq); + bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY); + bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN); + MemoryRegion *modern_mr = &proxy->notify; + MemoryRegion *legacy_mr = &proxy->bar; + hwaddr modern_addr = QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * + virtio_get_queue_index(vq); + hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; int r = 0; if (assign) { @@ -151,11 +160,23 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, return r; } virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); - memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, - true, n, notifier); + if (modern) { + memory_region_add_eventfd(modern_mr, modern_addr, 2, + true, n, notifier); + } + if (legacy) { + memory_region_add_eventfd(legacy_mr, legacy_addr, 2, + true, n, notifier); + } } else { - memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, - true, n, notifier); + if (modern) { + memory_region_del_eventfd(modern_mr, modern_addr, 2, + true, n, notifier); + } + if (legacy) { + memory_region_del_eventfd(legacy_mr, legacy_addr, 2, + true, n, notifier); + } virtio_queue_set_host_notifier_fd_handler(vq, false, false); event_notifier_cleanup(notifier); } @@ -934,8 +955,6 @@ static void virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, cap->cap_len - PCI_CAP_FLAGS); } -#define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 - static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, unsigned size) { |