[PATCH] configuration space endian-ness

["Michael S. Tsirkin" <mst@redhat.com>]

make it all LE and require natural width accesses

resolves VIRTIO-9

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 virtio-v1.0-wd01-part1-specification.txt | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt
index 91ee13e..d9a6de7 100644
--- a/virtio-v1.0-wd01-part1-specification.txt
+++ b/virtio-v1.0-wd01-part1-specification.txt
@@ -88,6 +88,8 @@ o Feature bits
 o Configuration space
 o One or more virtqueues
 
+Unless explicitly specified otherwise, all multi-byte fields are little-endian.
+
 2.1.1. Device Status Field
 -------------------------
 
@@ -202,7 +204,13 @@ Interface' in the section title.
 Configuration space is generally used for rarely-changing or
 initialization-time parameters.
 
-Note that this space is generally the guest's native endian,
+Note that configuration space generally uses the little-endian format
+for multi-byte fields.
+
+100.100.4.1. Legacy Interface: A Note on Configuration Space endian-ness
+--------------------------------------
+
+Note that for legacy interfaces, configuration space is generally the guest's native endian,
 rather than PCI's little-endian.
 
 2.1.4. Virtqueues
@@ -689,13 +697,14 @@ device-specific region.
 
 There may be different widths of accesses to the I/O region; the
 “natural” access method for each field in the virtio header must be
-used (i.e. 32-bit accesses for 32-bit fields, etc), but the
+used (i.e. 32-bit accesses for 32-bit fields, etc), but
+when accessed through the legacy interface the
 device-specific region can be accessed using any width accesses, and
 should obtain the same results.
 
 Note that this is possible because while the virtio header is PCI
-(i.e. little) endian, the device-specific region is encoded in
-the native endian of the guest (where such distinction is
+(i.e. little) endian, when using the legacy interface the device-specific
+region is encoded in the native endian of the guest (where such distinction is
 applicable).
 
 2.3.1.2.1. PCI Device Virtio Header
-- 
MST