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qemu/vfio-ccw-Connect-the-device-request-noti.patch
Bruce Rogers 0cf745d181 Accepting request 879686 from home:bfrogers:branches:Virtualization
- Fix s390x "mediated device is in use" error condition
  (bsc#1183634)
  update-linux-headers-Include-const.h.patch
  Update-linux-headers-to-5.11-rc2.patch
  vfio-ccw-Connect-the-device-request-noti.patch

OBS-URL: https://build.opensuse.org/request/show/879686
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=630
2021-03-17 13:23:38 +00:00

116 lines
3.8 KiB
Diff

From: Eric Farman <farman@linux.ibm.com>
Date: Mon, 4 Jan 2021 21:20:57 +0100
Subject: vfio-ccw: Connect the device request notifier
Git-commit: b2f96f9e4f5fbc8f2770a436191cb328da4d5350
References: 1183634
Now that the vfio-ccw code has a notifier interface to request that
a device be unplugged, let's wire that together.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20210104202057.48048-4-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
hw/vfio/ccw.c | 40 ++++++++++++++++++++++++++++++++++++----
1 file changed, 36 insertions(+), 4 deletions(-)
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index d2755d7fc5cace038ca7e4f87822..bc78a0ad7638c329bbc06a69a432 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -49,6 +49,7 @@ struct VFIOCCWDevice {
struct ccw_crw_region *crw_region;
EventNotifier io_notifier;
EventNotifier crw_notifier;
+ EventNotifier req_notifier;
bool force_orb_pfch;
bool warned_orb_pfch;
};
@@ -287,6 +288,21 @@ static void vfio_ccw_crw_read(VFIOCCWDevice *vcdev)
} while (1);
}
+static void vfio_ccw_req_notifier_handler(void *opaque)
+{
+ VFIOCCWDevice *vcdev = opaque;
+ Error *err = NULL;
+
+ if (!event_notifier_test_and_clear(&vcdev->req_notifier)) {
+ return;
+ }
+
+ qdev_unplug(DEVICE(vcdev), &err);
+ if (err) {
+ warn_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
+ }
+}
+
static void vfio_ccw_crw_notifier_handler(void *opaque)
{
VFIOCCWDevice *vcdev = opaque;
@@ -386,6 +402,10 @@ static void vfio_ccw_register_irq_notifier(VFIOCCWDevice *vcdev,
notifier = &vcdev->crw_notifier;
fd_read = vfio_ccw_crw_notifier_handler;
break;
+ case VFIO_CCW_REQ_IRQ_INDEX:
+ notifier = &vcdev->req_notifier;
+ fd_read = vfio_ccw_req_notifier_handler;
+ break;
default:
error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
return;
@@ -440,6 +460,9 @@ static void vfio_ccw_unregister_irq_notifier(VFIOCCWDevice *vcdev,
case VFIO_CCW_CRW_IRQ_INDEX:
notifier = &vcdev->crw_notifier;
break;
+ case VFIO_CCW_REQ_IRQ_INDEX:
+ notifier = &vcdev->req_notifier;
+ break;
default:
error_report("vfio: Unsupported device irq(%d)", irq);
return;
@@ -661,20 +684,28 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp)
vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX, &err);
if (err) {
- goto out_notifier_err;
+ goto out_io_notifier_err;
}
if (vcdev->crw_region) {
vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX, &err);
if (err) {
- vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
- goto out_notifier_err;
+ goto out_crw_notifier_err;
}
}
+ vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX, &err);
+ if (err) {
+ goto out_req_notifier_err;
+ }
+
return;
-out_notifier_err:
+out_req_notifier_err:
+ vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
+out_crw_notifier_err:
+ vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
+out_io_notifier_err:
vfio_ccw_put_region(vcdev);
out_region_err:
vfio_ccw_put_device(vcdev);
@@ -696,6 +727,7 @@ static void vfio_ccw_unrealize(DeviceState *dev)
S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
VFIOGroup *group = vcdev->vdev.group;
+ vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX);
vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
vfio_ccw_put_region(vcdev);