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| author | Michael S. Tsirkin <mst@redhat.com> | 2014-10-07 16:39:43 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-12-09 12:05:24 +0200 |
| commit | d025477368792b272802146a86e41f81a54d8a19 (patch) | |
| tree | 7e296d48d57796d6b797f4da6dac74d1644092fe /drivers/virtio | |
| parent | 0ffaeadfc451a11b5da35578b2f9b977f9f46489 (diff) | |
| download | lwn-d025477368792b272802146a86e41f81a54d8a19.tar.gz lwn-d025477368792b272802146a86e41f81a54d8a19.zip | |
virtio: add support for 64 bit features.
Change u32 to u64, and use BIT_ULL and 1ULL everywhere.
Note: transports are unchanged, and only set low 32 bit.
This guarantees that no transport sets e.g. VERSION_1
by mistake without proper support.
Based on patch by Rusty.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio.c | 8 | ||||
| -rw-r--r-- | drivers/virtio/virtio_mmio.c | 2 | ||||
| -rw-r--r-- | drivers/virtio/virtio_pci.c | 2 |
3 files changed, 6 insertions, 6 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 2b9aafb4d679..746d350c8062 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -159,7 +159,7 @@ static int virtio_dev_probe(struct device *_d) int err, i; struct virtio_device *dev = dev_to_virtio(_d); struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); - u32 device_features; + u64 device_features; /* We have a driver! */ add_status(dev, VIRTIO_CONFIG_S_DRIVER); @@ -171,14 +171,14 @@ static int virtio_dev_probe(struct device *_d) dev->features = 0; for (i = 0; i < drv->feature_table_size; i++) { unsigned int f = drv->feature_table[i]; - BUG_ON(f >= 32); - if (device_features & (1 << f)) + BUG_ON(f >= 64); + if (device_features & (1ULL << f)) __virtio_set_bit(dev, f); } /* Transport features always preserved to pass to finalize_features. */ for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++) - if (device_features & (1 << i)) + if (device_features & (1ULL << i)) __virtio_set_bit(dev, i); dev->config->finalize_features(dev); diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index eb5b0e2b434a..c63d0efa947b 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -142,7 +142,7 @@ struct virtio_mmio_vq_info { /* Configuration interface */ -static u32 vm_get_features(struct virtio_device *vdev) +static u64 vm_get_features(struct virtio_device *vdev) { struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index 4e112c158488..7e0efa7fc384 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -102,7 +102,7 @@ static struct virtio_pci_device *to_vp_device(struct virtio_device *vdev) } /* virtio config->get_features() implementation */ -static u32 vp_get_features(struct virtio_device *vdev) +static u64 vp_get_features(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); |