From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753952AbbCaTwm (ORCPT ); Tue, 31 Mar 2015 15:52:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43220 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751323AbbCaTwj (ORCPT ); Tue, 31 Mar 2015 15:52:39 -0400 Date: Tue, 31 Mar 2015 21:52:37 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Subject: [PATCH v2 0/6] virtio_balloon: virtio 1 support Message-ID: <1427831230-28044-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Virtio 1.0 doesn't include a modern balloon device. At some point we'll likely define an incompatible interface with a different ID. But for now, it's not a big effort to support a transitional balloon device: this has the advantage of supporting existing drivers, transparently, as well as transports that don't allow mixing virtio 0 and virtio 1 devices. And balloon is an easy device to test, so it's also useful for people to test virtio core handling of transitional devices. The only interface issue is with the stats buffer, which has misaligned fields. Seems easy to fix by prepending a 6 byte reserved field. I also had to change config structure field types from __le32 to __u32 to match other devices. This means we need a couple of __force tags for legacy path but that seems minor. Changes from v1: correctly handle config space endian-ness Michael S. Tsirkin (6): virtio_balloon: transitional interface virtio: balloon might not be a legacy device virtio_ccw: support non-legacy balloon devices virtio_mmio: support non-legacy balloon devices virtio_pci: support non-legacy balloon devices virtio: drop virtio_device_is_legacy_only include/linux/virtio.h | 2 -- include/uapi/linux/virtio_balloon.h | 11 +++++++++-- drivers/s390/kvm/virtio_ccw.c | 10 +++------- drivers/virtio/virtio.c | 6 ------ drivers/virtio/virtio_balloon.c | 29 +++++++++++++++++++++-------- drivers/virtio/virtio_mmio.c | 8 -------- drivers/virtio/virtio_pci_modern.c | 3 --- 7 files changed, 33 insertions(+), 36 deletions(-) -- MST