ahci_ctx
cfis = paddr_guest2host(ahci_ctx(sc), hdr->ctba,
p->cmd_lst = paddr_guest2host(ahci_ctx(sc), clb,
p->rfis = paddr_guest2host(ahci_ctx(sc), fb, 256);
breq->br_iov[j].iov_base = paddr_guest2host(ahci_ctx(p->pr_sc),
ptr = paddr_guest2host(ahci_ctx(p->pr_sc), prdt->dba, dbcsz);
ptr = paddr_guest2host(ahci_ctx(p->pr_sc), prdt->dba, dbcsz);