Messages in this thread | | | Subject | [PATCH v2 0/7] vhost: support for cross endian guests | From | Greg Kurz <> | Date | Thu, 02 Apr 2015 15:16:37 +0200 |
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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
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.
---
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
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