From: Tony Krowiak <akrowiak@linux.ibm.com>
To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com,
mjrosato@linux.ibm.com, pasic@linux.ibm.com,
alex.williamson@redhat.com, kwankhede@nvidia.com,
fiuczy@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com,
hca@linux.ibm.com, gor@linux.ibm.com,
Tony Krowiak <akrowiak@linux.ibm.com>
Subject: [PATCH v12 04/17] s390/vfio-ap: No need to disable IRQ after queue reset
Date: Tue, 24 Nov 2020 16:40:03 -0500 [thread overview]
Message-ID: <20201124214016.3013-5-akrowiak@linux.ibm.com> (raw)
In-Reply-To: <20201124214016.3013-1-akrowiak@linux.ibm.com>
The queues assigned to a matrix mediated device are currently reset when:
* The VFIO_DEVICE_RESET ioctl is invoked
* The mdev fd is closed by userspace (QEMU)
* The mdev is removed from sysfs.
Immediately after the reset of a queue, a call is made to disable
interrupts for the queue. This is entirely unnecessary because the reset of
a queue disables interrupts, so this will be removed.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 28 +++++-----------------------
1 file changed, 5 insertions(+), 23 deletions(-)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 8e6972495daa..dc699fd54505 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -26,14 +26,6 @@
static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev);
-static int match_apqn(struct device *dev, const void *data)
-{
- struct vfio_ap_queue *q = dev_get_drvdata(dev);
-
- return (q->apqn == *(int *)(data)) ? 1 : 0;
-}
-
-
/**
* vfio_ap_get_queue: Retrieve a queue with a specific APQN.
* @matrix_mdev: the associated mediated matrix
@@ -1121,20 +1113,6 @@ static int vfio_ap_mdev_group_notifier(struct notifier_block *nb,
return NOTIFY_OK;
}
-static void vfio_ap_irq_disable_apqn(int apqn)
-{
- struct device *dev;
- struct vfio_ap_queue *q;
-
- dev = driver_find_device(&matrix_dev->vfio_ap_drv->driver, NULL,
- &apqn, match_apqn);
- if (dev) {
- q = dev_get_drvdata(dev);
- vfio_ap_irq_disable(q);
- put_device(dev);
- }
-}
-
static int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi,
unsigned int retry)
{
@@ -1169,6 +1147,7 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev)
{
int ret;
int rc = 0;
+ struct vfio_ap_queue *q;
unsigned long apid, apqi;
struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev);
@@ -1184,7 +1163,10 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev)
*/
if (ret)
rc = ret;
- vfio_ap_irq_disable_apqn(AP_MKQID(apid, apqi));
+
+ q = vfio_ap_get_queue(matrix_mdev, AP_MKQID(apid, apqi);
+ if (q)
+ vfio_ap_free_aqic_resources(q);
}
}
--
2.21.1
next prev parent reply other threads:[~2020-11-24 21:40 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-24 21:39 [PATCH v12 00/17] s390/vfio-ap: dynamic configuration support Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 01/17] s390/vfio-ap: move probe and remove callbacks to vfio_ap_ops.c Tony Krowiak
2020-11-26 9:35 ` Halil Pasic
2020-11-24 21:40 ` [PATCH v12 02/17] s390/vfio-ap: decrement reference count to KVM Tony Krowiak
2020-11-26 9:42 ` Halil Pasic
2020-11-24 21:40 ` [PATCH v12 03/17] 390/vfio-ap: use new AP bus interface to search for queue devices Tony Krowiak
2020-11-26 10:34 ` Halil Pasic
2020-11-30 14:48 ` Tony Krowiak
2020-11-24 21:40 ` Tony Krowiak [this message]
2020-11-26 13:37 ` [PATCH v12 04/17] s390/vfio-ap: No need to disable IRQ after queue reset Halil Pasic
2020-11-24 21:40 ` [PATCH v12 05/17] s390/vfio-ap: manage link between queue struct and matrix mdev Tony Krowiak
2020-11-26 14:08 ` Halil Pasic
2020-12-14 23:37 ` Tony Krowiak
2020-11-26 14:45 ` Halil Pasic
2020-12-14 23:32 ` Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 06/17] s390/zcrypt: driver callback to indicate resource in use Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 07/17] s390/vfio-ap: implement in-use callback for vfio_ap driver Tony Krowiak
2020-11-26 15:54 ` Halil Pasic
2020-12-15 3:52 ` Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 08/17] s390/vfio-ap: introduce shadow APCB Tony Krowiak
2020-11-29 0:44 ` Halil Pasic
2020-11-24 21:40 ` [PATCH v12 09/17] s390/vfio-ap: sysfs attribute to display the guest's matrix Tony Krowiak
2020-11-29 0:49 ` Halil Pasic
2020-12-16 20:00 ` Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 10/17] s390/vfio-ap: initialize the guest apcb Tony Krowiak
2020-11-29 1:09 ` Halil Pasic
2020-12-16 20:08 ` Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 11/17] s390/vfio-ap: allow assignment of unavailable AP queues to mdev device Tony Krowiak
2020-11-29 1:17 ` Halil Pasic
2020-12-16 20:14 ` Tony Krowiak
2020-12-16 22:09 ` Halil Pasic
2020-11-24 21:40 ` [PATCH v12 12/17] s390/vfio-ap: allow hot plug/unplug of AP resources using " Tony Krowiak
2020-11-29 1:52 ` Halil Pasic
2020-11-30 19:36 ` Tony Krowiak
2020-11-30 23:32 ` Halil Pasic
2020-12-01 0:18 ` Tony Krowiak
2020-12-01 10:19 ` Halil Pasic
2020-12-01 17:56 ` Halil Pasic
2020-12-01 22:12 ` Tony Krowiak
2020-12-01 23:14 ` Halil Pasic
2020-11-24 21:40 ` [PATCH v12 13/17] s390/vfio-ap: hot plug/unplug queues on bind/unbind of queue device Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 14/17] s390/zcrypt: Notify driver on config changed and scan complete callbacks Tony Krowiak
[not found] ` <20201130101836.0399547c.pasic@linux.ibm.com>
2020-12-09 7:20 ` Harald Freudenberger
2020-12-16 20:32 ` Tony Krowiak
2020-12-16 20:54 ` Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 15/17] s390/vfio-ap: handle host AP config change notification Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 16/17] s390/vfio-ap: handle AP bus scan completed notification Tony Krowiak
2020-11-24 21:40 ` [PATCH v12 17/17] s390/vfio-ap: update docs to include dynamic config support Tony Krowiak
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