Messages in this thread | | | Subject | Re: [PATCH] vdpa/mlx5: set_features should allow reset to zero | From | Jason Wang <> | Date | Wed, 24 Feb 2021 17:30:37 +0800 |
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On 2021/2/24 4:43 下午, Michael S. Tsirkin wrote: > On Wed, Feb 24, 2021 at 04:26:43PM +0800, Jason Wang wrote: >> Basically on first guest access QEMU would tell kernel whether >> guest is using the legacy or the modern interface. >> E.g. virtio_pci_config_read/virtio_pci_config_write will call ioctl(ENABLE_LEGACY, 1) >> while virtio_pci_common_read will call ioctl(ENABLE_LEGACY, 0) >> >> >> But this trick work only for PCI I think? >> >> Thanks > ccw has a revision it can check. mmio does not have transitional devices > at all.
Ok, then we can do the workaround in the qemu, isn't it?
Thanks
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