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[Qemu-devel] [PATCHv3-RFC 0/2] qemu: properties for feature compatibilit
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCHv3-RFC 0/2] qemu: properties for feature compatibility |
Date: |
Mon, 21 Dec 2009 18:53:09 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
Here's what I came up with for solving the problem of differences in
features in virtio between 0.12 and 0.11. This also enables migration
between different backends, e.g. between host where tap supports virtio
net header and where it does not: management just needs to set features
appropriately.
Changes since RFC v2:
- we already have a flag to control write cache feature,
let's not add another one
Changes since RFC:
- add symbolic names for properties
- only optional features can be changed
Comments? Gerd, what do you think?
Michael S. Tsirkin (2):
qdev: add bit property type
virtio: add features as qdev properties
hw/qdev-properties.c | 70 +++++++++++++++++++++++++++++++++++++++++++++-----
hw/qdev.h | 9 ++++++
hw/syborg_virtio.c | 12 +++++---
hw/virtio-balloon.c | 4 +-
hw/virtio-blk.c | 6 +---
hw/virtio-blk.h | 8 +++++
hw/virtio-console.c | 4 +-
hw/virtio-net.c | 39 +++++++++++----------------
hw/virtio-net.h | 20 ++++++++++++++
hw/virtio-pci.c | 25 ++++++++++++-----
hw/virtio.c | 2 +-
hw/virtio.h | 7 ++++-
12 files changed, 152 insertions(+), 54 deletions(-)
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