Stefan Hajnoczi e77abbe98b libqos: add virtio used ring support ... Existing tests do not touch the virtqueue used ring. Instead they poll the virtqueue ISR register and peek into their request's device-specific status field. It turns out that the virtqueue ISR register can be set to 1 more than once for a single notification (see commit 83d768b564 "virtio: set ISR on dataplane notifications"). This causes problems for tests that assume a 1:1 correspondence between the ISR being 1 and request completion. Peeking at device-specific status fields is also problematic if the device has no field that can be abused for EINPROGRESS polling semantics. This is the case if all the field's values may be set by the device; there's no magic constant left for polling. It's time to process the used ring for completed requests, just like a real virtio guest driver. This patch adds the necessary APIs. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Tested-by: Eric Blake <eblake@redhat.com> Tested-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20170628184724.21378-3-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>		2017-06-30 11:03:45 +01:00
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ahci.c	…
ahci.h	…
fw_cfg.c	…
fw_cfg.h	…
i2c-imx.c	…
i2c-omap.c	…
i2c.c	…
i2c.h	…
libqos-pc.c	…
libqos-pc.h	…
libqos-spapr.c	…
libqos-spapr.h	…
libqos.c	…
libqos.h	…
malloc-generic.c	…
malloc-generic.h	…
malloc-pc.c	…
malloc-pc.h	…
malloc-spapr.c	…
malloc-spapr.h	…
malloc.c	…
malloc.h	…
pci-pc.c	…
pci-pc.h	…
pci-spapr.c	…
pci-spapr.h	…
pci.c	…
pci.h	…
rtas.c	…
rtas.h	…
usb.c	tests: fix usb-test leaks	2017-03-01 11:51:29 +04:00
usb.h	tests: fix usb-test leaks	2017-03-01 11:51:29 +04:00
virtio-mmio.c	…
virtio-mmio.h	…
virtio-pci.c	tests: fix virtio-blk-test leaks	2017-03-01 11:58:57 +04:00
virtio-pci.h	tests: add specialized device_find function	2017-03-01 11:57:04 +04:00
virtio.c	libqos: add virtio used ring support	2017-06-30 11:03:45 +01:00
virtio.h	libqos: add virtio used ring support	2017-06-30 11:03:45 +01:00