"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes: >> By my count, net still has 7 feature bits left, so I don't think the >> feature bits are likely to be a limitation in the next 6 months? > > Yes but you wanted a generic transport feature bit > for flexible SG layout. > Are you happy with VIRTIO_NET_F_ANY_HEADER_SG then? If we need it within 6 months, I'd rather do that: this feature would then be assumed for 1.0, and reserved. We may do that for other features, too (the committee will have to review). >> MMIO is a bigger problem. Linux guests are happy with it: does it break >> the Windows drivers? >> >> Thanks, >> Rusty. > > You mean make BAR0 an MMIO BAR? > Yes, it would break current windows guests. > Further, as long as we use same address to notify all queues, > we would also need to decode the instruction on x86 and that's > measureably slower than PIO. > We could go back to discussing hypercall use for notifications, > but that has its own set of issues... We might have something ready to deploy in 3 months, but realistically, I'd rather have it ready and tested outside the main git tree(s) and push it once the standard is committed. Cheers, Rusty. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
