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virtio_config: endian conversion for v1.0

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We (ab)use virtio conversion functions for device-specific
config space accesses.

Based on original patches by Cornelia and 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.com>
This commit is contained in:
Michael S. Tsirkin 2014-10-22 16:59:01 +03:00
parent 00e6f3d9d9
commit 92e6d7438e
1 changed files with 6 additions and 3 deletions
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9
include/linux/virtio_config.h
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@ -318,12 +318,13 @@ static inline u16 virtio_cread16(struct virtio_device *vdev,
{
u16 ret;
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return ret;
return virtio16_to_cpu(vdev, (__force __virtio16)ret);
}
static inline void virtio_cwrite16(struct virtio_device *vdev,
unsigned int offset, u16 val)
{
val = (__force u16)cpu_to_virtio16(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}
@ -332,12 +333,13 @@ static inline u32 virtio_cread32(struct virtio_device *vdev,
{
u32 ret;
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return ret;
return virtio32_to_cpu(vdev, (__force __virtio32)ret);
}
static inline void virtio_cwrite32(struct virtio_device *vdev,
unsigned int offset, u32 val)
{
val = (__force u32)cpu_to_virtio32(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}
@ -346,12 +348,13 @@ static inline u64 virtio_cread64(struct virtio_device *vdev,
{
u64 ret;
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return ret;
return virtio64_to_cpu(vdev, (__force __virtio64)ret);
}
static inline void virtio_cwrite64(struct virtio_device *vdev,
unsigned int offset, u64 val)
{
val = (__force u64)cpu_to_virtio64(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}