Linux Virtualization - Oct 2014 - [PATCH RFC v4 07/17] virtio_config: endian conversion for v1.0

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

Reviewed-by: David Hildenbrand <dahi at linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty at rustcorp.com.au>
Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
 include/linux/virtio_config.h | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 952b6d7..05b9ff7 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -281,12 +281,13 @@ 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));
 }
 
@@ -295,12 +296,13 @@ 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));
 }
 
@@ -309,12 +311,13 @@ 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));
 }
 
-- 
MST

On Thu, 23 Oct 2014 19:24:30 +0300
"Michael S. Tsirkin" <mst at redhat.com> wrote:
> We (ab)use virtio conversion functions for device-specific
> config space accesses.
> 
> Reviewed-by: David Hildenbrand <dahi at linux.vnet.ibm.com>
> Signed-off-by: Rusty Russell <rusty at rustcorp.com.au>
> Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com>
> Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> ---
>  include/linux/virtio_config.h | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
Not objecting to the patch, but something seems to have gotten messed
up wrt authorship? You only adapted it, right?

On Fri, Oct 24, 2014 at 10:53:27AM +0200, Cornelia Huck
wrote:
> On Thu, 23 Oct 2014 19:24:30 +0300
> "Michael S. Tsirkin" <mst at redhat.com> wrote:
> 
> > We (ab)use virtio conversion functions for device-specific
> > config space accesses.
> > 
> > Reviewed-by: David Hildenbrand <dahi at linux.vnet.ibm.com>
> > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au>
> > Signed-off-by: Cornelia Huck <cornelia.huck at de.ibm.com>
> > Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> > ---
> >  include/linux/virtio_config.h | 9 ++++++---
> >  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> Not objecting to the patch, but something seems to have gotten messed
> up wrt authorship? You only adapted it, right?
I'll change author to Rusty.