Virtual machine hang with softlockup waiting on ioread8/ioread16

Issue

• System hang with softlockup waiting on ioread8() or ioread16():

NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [pool-283592-thr:10122]
Kernel panic - not syncing: softlockup: hung tasks
NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [pool-283592-thr:10124]
NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [pool-283592-thr:10121]

 #0 [ffff9f77a73c8e48] crash_nmi_callback at ffffffff85258567
 #1 [ffff9f77a73c8e58] nmi_handle at ffffffff8598d93c
 #2 [ffff9f77a73c8eb0] do_nmi at ffffffff8598db5d
 #3 [ffff9f77a73c8ef0] end_repeat_nmi at ffffffff8598cd9c
    [exception RIP: ioread8+22]
    RIP: ffffffff855a1946  RSP: ffff9f723ab4f980  RFLAGS: 00000006
    RAX: ffffffffc01b7750  RBX: ffff9f72f3bec000  RCX: 0023b13d90468d80
    RDX: 0000000000000177  RSI: 0000000000000007  RDI: 0000000000010177
    RBP: ffff9f723ab4f988   R8: 0000000000000010   R9: ffff9f72f3bec198
    R10: ffff9f71b67e8000  R11: 7fffffffffffffff  R12: 00000000000003e8
    R13: 0000000000000000  R14: 0000000000000001  R15: ffff9f72f3bec158
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #4 [ffff9f723ab4f980] ioread8 at ffffffff855a1946
 #5 [ffff9f723ab4f980] ata_sff_check_status at ffffffffc01b7782 [libata]
 #6 [ffff9f723ab4f990] ata_dev_select.constprop.19 at ffffffffc01ba6b7 [libata]
 #7 [ffff9f723ab4f9b8] ata_sff_qc_issue at ffffffffc01ba775 [libata]
 #8 [ffff9f723ab4f9e8] ata_bmdma_qc_issue at ffffffffc01ba953 [libata]
 #9 [ffff9f723ab4fa18] ata_qc_issue at ffffffffc01a5a35 [libata]
#10 [ffff9f723ab4fa70] ata_scsi_queuecmd at ffffffffc01aed38 [libata]
#11 [ffff9f723ab4fab8] scsi_dispatch_cmd at ffffffff856e3e70
#12 [ffff9f723ab4fae0] scsi_request_fn at ffffffff856ed59c
#13 [ffff9f723ab4fb48] __blk_run_queue at ffffffff85553809
#14 [ffff9f723ab4fb60] blk_execute_rq_nowait at ffffffff8555ba45
#15 [ffff9f723ab4fba0] blk_execute_rq at ffffffff8555bb8b
#16 [ffff9f723ab4fc58] scsi_execute at ffffffff856e9ef3
#17 [ffff9f723ab4fc98] scsi_execute_req_flags at ffffffff856ebdce
#18 [ffff9f723ab4fd00] sr_check_events at ffffffffc01eb31c [sr_mod]
#19 [ffff9f723ab4fd70] cdrom_check_events at ffffffffc02a505e [cdrom]
#20 [ffff9f723ab4fd88] sr_block_check_events at ffffffffc01ec091 [sr_mod]
#21 [ffff9f723ab4fdb0] disk_check_events at ffffffff855698d6
#22 [ffff9f723ab4fe10] disk_events_workfn at ffffffff85569a16
#23 [ffff9f723ab4fe20] process_one_work at ffffffff852bddcf
#24 [ffff9f723ab4fe68] worker_thread at ffffffff852beee6
#25 [ffff9f723ab4fec8] kthread at ffffffff852c5da1