Hi, This series was developped by Jean-Philippe and is needed for a series I'll be posting shortly after to load firmwares on arm kvmtool. Currently, when a guest tries to reset a device, a lot of ressources aren't reset (threads keep running, virtio queue keep their state, etc). When the guest only does the reset to initialize the device and there were no previous users, there is no noticeable issue. But when a guest has a firmare + Linux, if the firmware uses a virtio device, Linux will fail to probe that device. This series aim to properly reset the virtio resources when the guests requests it. Reset of net vhost is unsupported for now. Patch 1 is a bug fix on ioeventfd Patch 2-6 provide the core support so devices can implement their reset Patch 7-13 implements the reset for the various virtio devices Changes since v1[1]: - Fix build issue by removing reference to VIRTIO_CONFIG_S_NEEDS_RESET [1] https://marc.info/?l=kvm&m=154392208726108&w=2 Thanks, Julien --> Jean-Philippe Brucker (13): ioeventfd: Fix removal of ioeventfd virtio: Implement notify_status virtio: Add get_vq_count() callback virtio: Add get_vq() callback virtio: Add exit_vq() callback virtio: Add reset() callback net/uip: Add exit function virtio/net: Clean virtqueue state virtio/net: Implement device and virtqueue reset virtio/blk: Reset virtqueue threadpool: Add cancel() function virtio/p9: Implement reset virtio/console: Implement reset include/kvm/threadpool.h | 2 + include/kvm/uip.h | 6 ++ include/kvm/virtio-mmio.h | 1 + include/kvm/virtio-pci.h | 1 + include/kvm/virtio.h | 29 ++++++- ioeventfd.c | 6 +- net/uip/core.c | 17 ++++ net/uip/dhcp.c | 6 ++ net/uip/tcp.c | 54 ++++++++++--- net/uip/udp.c | 41 ++++++++-- util/threadpool.c | 25 +++++- virtio/9p.c | 33 +++++++- virtio/balloon.c | 17 +++- virtio/blk.c | 84 ++++++++++++++------ virtio/console.c | 49 ++++++++---- virtio/core.c | 42 ++++++++++ virtio/mmio.c | 52 +++++++++---- virtio/net.c | 195 +++++++++++++++++++++++++++++++++------------- virtio/pci.c | 49 ++++++++---- virtio/rng.c | 12 ++- virtio/scsi.c | 17 +++- 21 files changed, 581 insertions(+), 157 deletions(-) -- 1.9.1
