Hi,  

I've been doing some testing if KVM with 4K physical sector virtio disks and 
they work with KVM as a none boot disk.  We'd like to be able to boot a 4k 
physical sector disk in KVM, is there 4K support in any seabios newer/upcoming 
releases, or is there a way to configure for 4k sectors?

reference from master
src/hw/virtio-blk.c lin 142

       if (vdrive->drive.blksize != DISK_SECTOR_SIZE) {
            dprintf(1, "virtio-blk %pP block size %d is unsupported\n",
                    pci, vdrive->drive.blksize);
            goto fail;
        }

Thanks,
Jim

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