The vfio-ccw module does the check too, and there is actually no technical obstacle for supporting fmt 1 idaws. Let us be ready for the beautiful day when fmt 1 idaws become supported by the vfio-ccw kernel module. QEMU does not have to do a thing for that, except not insisting on this check.
Signed-off-by: Halil Pasic <pa...@linux.ibm.com> Acked-by: Jason J. Herne <jjhe...@linux.ibm.com> Tested-by: Jason J. Herne <jjhe...@linux.ibm.com> --- v1 -> v2: unchanged --- hw/s390x/css.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 39ae5bbf7e..5424ea4562 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -1199,17 +1199,6 @@ static IOInstEnding sch_handle_start_func_passthrough(SubchDev *sch) assert(orb != NULL); p->intparm = orb->intparm; } - - /* - * Only support prefetch enable mode. - * Only support 64bit addressing idal. - */ - if (!(orb->ctrl0 & ORB_CTRL0_MASK_C64)) { - warn_report("vfio-ccw requires PFCH and C64 flags set"); - sch_gen_unit_exception(sch); - css_inject_io_interrupt(sch); - return IOINST_CC_EXPECTED; - } return s390_ccw_cmd_request(sch); } -- 2.16.3