linux-kernel - [PATCH v4 0/8] vhost: support for cross endian guests

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Date:	Fri, 10 Apr 2015 12:15:00 +0200
From:	Greg Kurz <gkurz@...ux.vnet.ibm.com>
To:	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Cornelia Huck <cornelia.huck@...ibm.com>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: [PATCH v4 0/8] vhost: support for cross endian guests

Hi,

This patchset allows vhost to be used with legacy virtio when guest and host
have a different endianness.

Patch 7 got rewritten according to Cornelia's and Michael's comments. I have
also introduced patch 8 that brings BE vnet headers support to tun/macvtap.

This series is enough to have vhost_net working flawlessly. I could
succesfully reboot guests from ppc64 to ppc64le and vice-versa on ppc64
and ppc64le hosts.

---

Greg Kurz (8):
      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
      macvtap/tun: add VNET_BE flag


 drivers/net/Kconfig              |   12 ++++++
 drivers/net/macvtap.c            |   69 ++++++++++++++++++++++++++++++++++-
 drivers/net/tun.c                |   71 +++++++++++++++++++++++++++++++++++-
 drivers/vhost/Kconfig            |   10 +++++
 drivers/vhost/vhost.c            |   76 ++++++++++++++++++++++++++++++++++++++
 drivers/vhost/vhost.h            |   25 ++++++++++---
 include/linux/virtio_byteorder.h |   24 +++++++-----
 include/linux/virtio_config.h    |   19 +++++++---
 include/linux/vringh.h           |   19 +++++++---
 include/uapi/linux/if_tun.h      |    2 +
 include/uapi/linux/vhost.h       |    9 +++++
 11 files changed, 303 insertions(+), 33 deletions(-)

--
Greg

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