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In our Armv8a server, we try to configure the vhost scsi but fail to boot up the guest (-machine virt-2.10). The guest's boot failure is very early, even earlier than grub. There are 3 virtqueues (ctrl, event and cmd) for virtio scsi device, but ovmf and seabios will only set the physical address for the 3rd one (cmd). Then in vhost_virtqueue_start(), virtio_queue_get_desc_addr will be 0 for ctrl and event vq when qemu negotiates with ovmf. So vhost_memory_map fails with ENOMEM. This patch just fixs it by early quitting the virtqueue start/stop when virtio_queue_get_desc_addr is 0. Btw, after guest kernel starts, all the 3 queues will be initialized and set address correctly. Already tested on Arm64 and X86_64 qemu. Signed-off-by: Jia He <jia.he@hxt-semitech.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
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| .. | ||
| Makefile.objs | ||
| trace-events | ||
| vhost-backend.c | ||
| vhost-stub.c | ||
| vhost-user.c | ||
| vhost-vsock.c | ||
| vhost.c | ||
| virtio-balloon.c | ||
| virtio-bus.c | ||
| virtio-crypto-pci.c | ||
| virtio-crypto.c | ||
| virtio-mmio.c | ||
| virtio-pci.c | ||
| virtio-pci.h | ||
| virtio-rng.c | ||
| virtio.c | ||