From d025477368792b272802146a86e41f81a54d8a19 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Tue, 7 Oct 2014 16:39:43 +0200 Subject: 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 Signed-off-by: Cornelia Huck Signed-off-by: Michael S. Tsirkin Reviewed-by: David Hildenbrand Reviewed-by: Cornelia Huck --- drivers/virtio/virtio.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/virtio/virtio.c') 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); -- cgit v1.2.3