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Subject[PATCH v5 0/8] vhost: support for cross endian guests
From
Date
Hi,

This patchset allows vhost to be used with legacy virtio when guest and host
have a different endianness. It is compatible with modern virtio and can be
fully compiled out through kernel config.

FWIW, I could flawlessly kexec/reboot guests from ppc64 to ppc64le and back.
I could also migrate from a ppc64 to a ppc64le host and back. No regressions
on x86 as expected. My experimental QEMU tree is here:

https://github.com/gkurz/qemu.git vhost/cross-endian

I'd be glad if this series could make it to 4.1.

Cheers.

---

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: cross-endian support for legacy devices
macvtap/tun: cross-endian support for little-endian hosts


drivers/net/Kconfig | 14 ++++++
drivers/net/macvtap.c | 68 +++++++++++++++++++++++++++++-
drivers/net/tun.c | 70 ++++++++++++++++++++++++++++++-
drivers/vhost/Kconfig | 15 +++++++
drivers/vhost/vhost.c | 86 ++++++++++++++++++++++++++++++++++++++
drivers/vhost/vhost.h | 25 ++++++++---
include/linux/virtio_byteorder.h | 24 ++++++-----
include/linux/virtio_config.h | 20 ++++++---
include/linux/vringh.h | 17 +++++---
include/uapi/linux/if_tun.h | 6 +++
include/uapi/linux/vhost.h | 12 +++++
11 files changed, 324 insertions(+), 33 deletions(-)

--
Greg



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