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From: Greg Kurz <gkurz@linux.vnet.ibm.com>
To: Rusty Russell <rusty@rustcorp.com.au>,
	"Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, virtualization@lists.linux-foundation.org
Subject: [PATCH v5 1/8] virtio: introduce virtio_is_little_endian() helper
Date: Thu, 23 Apr 2015 17:26:20 +0200	[thread overview]
Message-ID: <20150423152617.11795.13272.stgit@bahia.local> (raw)
In-Reply-To: <20150423152608.11795.4373.stgit@bahia.local>

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
---
 include/linux/virtio_config.h |   17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index ca3ed78..bd1a582 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -205,35 +205,40 @@ int virtqueue_set_affinity(struct virtqueue *vq, int cpu)
 	return 0;
 }
 
+static inline bool virtio_is_little_endian(struct virtio_device *vdev)
+{
+	return virtio_has_feature(vdev, VIRTIO_F_VERSION_1);
+}
+
 /* Memory accessors */
 static inline u16 virtio16_to_cpu(struct virtio_device *vdev, __virtio16 val)
 {
-	return __virtio16_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __virtio16_to_cpu(virtio_is_little_endian(vdev), val);
 }
 
 static inline __virtio16 cpu_to_virtio16(struct virtio_device *vdev, u16 val)
 {
-	return __cpu_to_virtio16(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __cpu_to_virtio16(virtio_is_little_endian(vdev), val);
 }
 
 static inline u32 virtio32_to_cpu(struct virtio_device *vdev, __virtio32 val)
 {
-	return __virtio32_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __virtio32_to_cpu(virtio_is_little_endian(vdev), val);
 }
 
 static inline __virtio32 cpu_to_virtio32(struct virtio_device *vdev, u32 val)
 {
-	return __cpu_to_virtio32(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __cpu_to_virtio32(virtio_is_little_endian(vdev), val);
 }
 
 static inline u64 virtio64_to_cpu(struct virtio_device *vdev, __virtio64 val)
 {
-	return __virtio64_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __virtio64_to_cpu(virtio_is_little_endian(vdev), val);
 }
 
 static inline __virtio64 cpu_to_virtio64(struct virtio_device *vdev, u64 val)
 {
-	return __cpu_to_virtio64(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+	return __cpu_to_virtio64(virtio_is_little_endian(vdev), val);
 }
 
 /* Config space accessors. */

  reply	other threads:[~2015-04-23 15:26 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-23 15:26 [PATCH v5 0/8] vhost: support for cross endian guests Greg Kurz
2015-04-23 15:26 ` Greg Kurz [this message]
2015-04-23 17:22   ` [PATCH v5 1/8] virtio: introduce virtio_is_little_endian() helper Thomas Huth
2015-04-23 17:26     ` Thomas Huth
2015-04-23 18:52   ` Thomas Huth
2015-04-23 15:26 ` [PATCH v5 2/8] tun: add tun_is_little_endian() helper Greg Kurz
2015-04-23 18:57   ` Thomas Huth
2015-04-23 15:26 ` [PATCH v5 3/8] macvtap: introduce macvtap_is_little_endian() helper Greg Kurz
2015-04-23 18:59   ` Thomas Huth
2015-04-23 15:26 ` [PATCH v5 4/8] vringh: introduce vringh_is_little_endian() helper Greg Kurz
2015-04-23 19:00   ` Thomas Huth
2015-04-23 15:27 ` [PATCH v5 5/8] vhost: introduce vhost_is_little_endian() helper Greg Kurz
     [not found]   ` <20150423152700.11795.9146.stgit-GiB8zCg7hOfDOqzlkpFKJg@public.gmane.org>
2015-04-23 19:05     ` Thomas Huth
2015-04-23 15:29 ` [PATCH v5 6/8] virtio: add explicit big-endian support to memory accessors Greg Kurz
     [not found]   ` <20150423152712.11795.29245.stgit-GiB8zCg7hOfDOqzlkpFKJg@public.gmane.org>
2015-04-23 19:27     ` Thomas Huth
2015-04-24  7:04       ` Cornelia Huck
     [not found]         ` <20150424090421.123d6ff6.cornelia.huck-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2015-04-24  7:56           ` Greg Kurz
2015-04-23 15:29 ` [PATCH v5 7/8] vhost: cross-endian support for legacy devices Greg Kurz
2015-04-24  7:19   ` Cornelia Huck
2015-04-24  8:06     ` Greg Kurz
2015-04-24  8:09       ` Cornelia Huck
     [not found] ` <20150423152608.11795.4373.stgit-GiB8zCg7hOfDOqzlkpFKJg@public.gmane.org>
2015-04-23 15:30   ` [PATCH v5 8/8] macvtap/tun: cross-endian support for little-endian hosts Greg Kurz

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