diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2016-11-04 12:04:23 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-11-15 17:20:36 +0200 |
| commit | 9b706dbbbb81f5cb7c67e491d38cd6077205e056 (patch) | |
| tree | a6169a835baa959e8dbdaae6cadb22136665ad9e | |
| parent | 1b39bc1cf67eee07518ee05ce9306eaa53d868e4 (diff) | |
| download | qemu-9b706dbbbb81f5cb7c67e491d38cd6077205e056.tar.gz | |
virtio: allow per-device-class legacy features
Legacy features are those that transitional devices only
expose on the legacy interface.
Allow different ones per device class.
Cc: qemu-stable@nongnu.org # dependency for the next patch
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 4 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.c | 4 | ||||
| -rw-r--r-- | hw/virtio/virtio.c | 2 | ||||
| -rw-r--r-- | include/hw/virtio/virtio.h | 5 |
4 files changed, 13 insertions, 2 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 7d7f8f6e19..f5c1d98192 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -303,6 +303,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret = -EFAULT; } else { + VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); + features.index = address_space_ldub(&address_space_memory, ccw.cda + sizeof(features.features), @@ -312,7 +314,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (dev->revision >= 1) { /* Don't offer legacy features for modern devices. */ features.features = (uint32_t) - (vdev->host_features & ~VIRTIO_LEGACY_FEATURES); + (vdev->host_features & ~vdc->legacy_features); } else { features.features = (uint32_t)vdev->host_features; } diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 62001b46d7..97b32febaf 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1175,7 +1175,9 @@ static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, break; case VIRTIO_PCI_COMMON_DF: if (proxy->dfselect <= 1) { - val = (vdev->host_features & ~VIRTIO_LEGACY_FEATURES) >> + VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); + + val = (vdev->host_features & ~vdc->legacy_features) >> (32 * proxy->dfselect); } break; diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 1df5f4e5b0..72ee06be6c 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2214,6 +2214,8 @@ static void virtio_device_class_init(ObjectClass *klass, void *data) dc->props = virtio_properties; vdc->start_ioeventfd = virtio_device_start_ioeventfd_impl; vdc->stop_ioeventfd = virtio_device_stop_ioeventfd_impl; + + vdc->legacy_features |= VIRTIO_LEGACY_FEATURES; } bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev) diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index f12a1a8635..bdb3c4b46b 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -113,6 +113,11 @@ typedef struct VirtioDeviceClass { void (*set_config)(VirtIODevice *vdev, const uint8_t *config); void (*reset)(VirtIODevice *vdev); void (*set_status)(VirtIODevice *vdev, uint8_t val); + /* For transitional devices, this is a bitmap of features + * that are only exposed on the legacy interface but not + * the modern one. + */ + uint64_t legacy_features; /* Test and clear event pending status. * Should be called after unmask to avoid losing events. * If backend does not support masking, |