static void virtio_setup(uint64_t dev_info) { struct schib schib; int i; int r; bool found = false; bool check_devno = false; uint16_t dev_no = -1; blk_schid.one = 1; if (dev_info != -1) { check_devno = true; dev_no = dev_info & 0xffff; debug_print_int("device no. ", dev_no); blk_schid.ssid = (dev_info >> 16) & 0x3; if (blk_schid.ssid != 0) { debug_print_int("ssid ", blk_schid.ssid); if (enable_mss_facility() != 0) { virtio_panic("Failed to enable mss facility\n"); } } } for (i = 0; i < 0x10000; i++) { blk_schid.sch_no = i; r = stsch_err(blk_schid, &schib); if (r == 3) { break; } if (schib.pmcw.dnv) { if (!check_devno || (schib.pmcw.dev == dev_no)) { if (virtio_is_blk(blk_schid)) { found = true; break; } } } } if (!found) { virtio_panic("No virtio-blk device found!\n"); } virtio_setup_block(blk_schid); }