From: Farhan Ali <alifm@linux.ibm.com>
Subject: s390: vfio-ap: implement VFIO_DEVICE_RESET ioctl
Patch-mainline: v4.20-rc1
Git-commit: cd8a377e3b40002cd7983b53f384456393908b7e
References: FATE#326370, LTC#169186, bsc#1113483
Summary: kernel: AP Crypto Passthrough
Description: This adds support for AP crypto passthrough for
kvm guests.
Upstream-Description:
s390: vfio-ap: implement VFIO_DEVICE_RESET ioctl
Implements the VFIO_DEVICE_RESET ioctl. This ioctl zeroizes
all of the AP queues assigned to the guest.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Tested-by: Michael Mueller <mimu@linux.ibm.com>
Tested-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20180925231641.4954-15-akrowiak@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -917,7 +917,7 @@ static int vfio_ap_mdev_get_device_info(
if (info.argsz < minsz)
return -EINVAL;
- info.flags = VFIO_DEVICE_FLAGS_AP;
+ info.flags = VFIO_DEVICE_FLAGS_AP | VFIO_DEVICE_FLAGS_RESET;
info.num_regions = 0;
info.num_irqs = 0;
@@ -933,6 +933,9 @@ static ssize_t vfio_ap_mdev_ioctl(struct
case VFIO_DEVICE_GET_INFO:
ret = vfio_ap_mdev_get_device_info(arg);
break;
+ case VFIO_DEVICE_RESET:
+ ret = vfio_ap_mdev_reset_queues(mdev);
+ break;
default:
ret = -EOPNOTSUPP;
break;