From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kurz Subject: [PATCH 0/3] vhost_net: support for cross endian guests Date: Fri, 20 Feb 2015 11:07:24 +0100 Message-ID: <20150220100724.18608.74654.stgit@bahia.local> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Cedric Le Goater , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org To: "Michael S. Tsirkin" Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Hi, This patchset allows vhost_net to be used with legacy virtio when guest and host have a different endianness. It is based on previous work by C=C3=A9dric Le Goater: https://www.mail-archive.com/kvm-ppc@vger.kernel.org/msg09848.html As suggested by MST: - the API now asks for a specific format (big endian) instead of the hi= nt whether byteswap is needed or not (patch 1) - rebased on top of the virtio-1 accessors (patch 2) Patch 3 is a separate fix: I think it is also valid for virtio-1. Please comment. --- Greg Kurz (3): vhost: add VHOST_VRING_F_LEGACY_BIG_ENDIAN flag vhost: add support for legacy virtio vhost_net: fix virtio_net header endianness drivers/vhost/net.c | 32 ++++++++++++++++++++++++++------ drivers/vhost/vhost.c | 6 +++++- drivers/vhost/vhost.h | 23 +++++++++++++++++------ include/uapi/linux/vhost.h | 2 ++ 4 files changed, 50 insertions(+), 13 deletions(-) -- Greg