On Wed, Feb 24, 2021 at 05:30:37PM +0800, Jason Wang wrote: > > 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 which one do you mean? -- MST _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
