On Thu, Apr 02, 2015 at 03:16:37PM +0200, Greg Kurz wrote: > Hi, > > This patchset allows vhost to be used with legacy virtio when guest and host > have a different endianness. It is a complete rework of my initial post. > > Patches 1 to 5 are preliminary work: we move the endianness check out of all > memory accessors to separate functions. > > Patch 6 changes the semantics of the accessors so that they have explicit big > endian support. > > Patch 7 brings the cross-endian feature, with the following changes since v1: > - conditionnal enablement through a kernel config > - introduction of a new vhost feature to advertise cross-endian to userspace I think adding ioctls is sufficient for this, we don't need to burn up a feature bit. > The tentative to fix vnet headers was dropped for the moment. As a consequnce, > vhost_net still fails to work with cross-endian. It will be fixed in another > patchset I'm currently working on. I think I'll probably hold off on applying this patchset until it all actually works. > --- > > Greg Kurz (7): > virtio: introduce virtio_is_little_endian() helper > tun: add tun_is_little_endian() helper > macvtap: introduce macvtap_is_little_endian() helper > vringh: introduce vringh_is_little_endian() helper > vhost: introduce vhost_is_little_endian() helper > virtio: add explicit big-endian support to memory accessors > vhost: feature to set the vring endianness > > > drivers/net/macvtap.c | 11 +++++++++-- > drivers/net/tun.c | 11 +++++++++-- > drivers/vhost/Kconfig | 10 ++++++++++ > drivers/vhost/net.c | 5 +++++ > drivers/vhost/scsi.c | 4 ++++ > drivers/vhost/test.c | 4 ++++ > drivers/vhost/vhost.c | 19 +++++++++++++++++++ > drivers/vhost/vhost.h | 32 +++++++++++++++++++++++++------- > include/linux/virtio_byteorder.h | 24 ++++++++++++++---------- > include/linux/virtio_config.h | 19 +++++++++++++------ > include/linux/vringh.h | 19 +++++++++++++------ > include/uapi/linux/vhost.h | 10 ++++++++++ > 12 files changed, 135 insertions(+), 33 deletions(-) > > -- > Greg _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
