From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
Hi,
This series converts the outer most layer of virtio to
use VMState macros; this is the easy bit, but I'm hoping that
having done that, the next trick is to nibble away at the virtio_save/load
functions and all of the zillions of device/bus helpers.
I think the first two patches are the most controversial;
they remove migration support for old version of virtio-net and virtio-serial;
(for virtio-net versions prior to 0.11 and for virtio-serial prior to 0.13).
I'm working on the basis that migration has bit rotted enough so
that the streams aren't migration compatible for that long back
on upstream - but if anyone knows otherwise please shout.
The reason for doing those is that the virtio structure makes
it a bit tricky to pass the outer device version number down
through VMState to the device specific code (I can do it
as a hack if necessary using a dummy is_needed function);
and with -net and -serial compatibility sorted I think
every other device just supports a single version.
My main reason for doing this is to get rid of the
calls to register_savevm ('going to disappear as soon..' since 2010)
It's lightly tested using the magic line:
./x86_64-softmmu/qemu-system-x86_64 -nographic -machine pc-i440fx-2.6,accel=kvm
-cpu qemu64 -m 2048M -drive file=/home/vmimages/f20.img,if=none,id=drivea
-device virtio-scsi,id=scsi -device scsi-hd,drive=drivea -device virtio-rng
-device virtio-serial -chardev file,id=test,path=/tmp/testfile -device
virtconsole,chardev=test,name=foo -virtfs
local,path=/home,security_model=passthrough,mount_tag=host_share -device
virtio-gpu -drive file=/home/vmimages/jeos-19-64.qcow2,id=jeos,if=none -device
virtio-blk,drive=jeos -device virtio-balloon
Thoughts?
Dave
Dr. David Alan Gilbert (13):
virtio-net: Remove old migration version support
virtio-serial: Remove old migration version support
virtio: Migration helper function and macro
virtio-scsi: Wrap in vmstate
virtio-blk: Wrap in vmstate
virtio-rng: Wrap in vmstate
virtio-balloon: Wrap in vmstate
virtio-net: Wrap in vmstate
virtio-serial: Wrap in vmstate
9pfs: Wrap in vmstate
virtio-input: Wrap in vmstate
virtio-gpu: Wrap in vmstate
virtio: Update migration docs
docs/virtio-migration.txt | 6 ++-
hw/9pfs/virtio-9p-device.c | 14 +++---
hw/block/virtio-blk.c | 16 +++----
hw/char/virtio-serial-bus.c | 62 +++++++++------------------
hw/display/virtio-gpu.c | 17 +++-----
hw/input/virtio-input.c | 26 +++--------
hw/net/virtio-net.c | 102 +++++++++++++++++---------------------------
hw/scsi/virtio-scsi.c | 21 +++------
hw/virtio/virtio-balloon.c | 19 +++------
hw/virtio/virtio-rng.c | 20 +++------
hw/virtio/virtio.c | 6 +++
include/hw/virtio/virtio.h | 20 +++++++++
12 files changed, 130 insertions(+), 199 deletions(-)
--
2.7.4
