From: Anthony Krowiak <akrowiak@xxxxxxxxxxxxx> The interception handler for the PQAP(AQIC) command calls the kvm_s390_gisc_register function to register the guest ISC with the channel subsystem. If that call fails, the status response code 08 - indicating Invalid ZONE/GISA designation - is returned to the guest. This response code does not make sense because the non-zero return code from the kvm_s390_gisc_register function can be due one of two things: Either the ISC passed as a parameter by the guest to the PQAP(AQIC) command is greater than the maximum ISC value allowed, or the guest is not using a GISA. Since this scenario is very unlikely to happen and there is no status response code to indicate an invalid ISC value, let's set the response code to 06 indicating 'Invalid address of AP-queue notification byte'. While this is not entirely accurate, it is better than indicating that the ZONE/GISA designation is invalid which is something the guest can do nothing about since those values are set by the hypervisor. Signed-off-by: Anthony Krowiak <akrowiak@xxxxxxxxxxxxx> Suggested-by: Halil Pasic <pasic@xxxxxxxxxxxxx> --- drivers/s390/crypto/vfio_ap_ops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 9cb28978c186..e7e4dbbf5ad3 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -394,7 +394,7 @@ static int ensure_nib_shared(unsigned long addr, struct gmap *gmap) * host ISC to issue the host side PQAP/AQIC * * Response.status may be set to AP_RESPONSE_INVALID_ADDRESS in case the - * vfio_pin_pages failed. + * vfio_pin_pages or kvm_s390_gisc_register failed. * * Otherwise return the ap_queue_status returned by the ap_aqic(), * all retry handling will be done by the guest. @@ -458,7 +458,7 @@ static struct ap_queue_status vfio_ap_irq_enable(struct vfio_ap_queue *q, __func__, nisc, isc, q->apqn); vfio_unpin_pages(&q->matrix_mdev->vdev, nib, 1); - status.response_code = AP_RESPONSE_INVALID_GISA; + status.response_code = AP_RESPONSE_INVALID_ADDRESS; return status; } -- 2.41.0
