Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Jason Wang <jasowang@redhat.com>
To:     jasowang@redhat.com, mst@redhat.com, linux-kernel@vger.kernel.org,
        virtualization@lists.linux-foundation.org
Cc:     sgarzare@redhat.com, eperezma@redhat.com, lulu@redhat.com,
        tglx@linutronix.de, peterz@infradead.org, paulmck@kernel.org,
        maz@kernel.org, pasic@linux.ibm.com, cohuck@redhat.com
Subject: [PATCH V3 5/9] virtio-mmio: implement synchronize_cbs()
Date:   Mon, 25 Apr 2022 10:44:14 +0800
Message-Id: <20220425024418.8415-6-jasowang@redhat.com>
In-Reply-To: <20220425024418.8415-1-jasowang@redhat.com>
References: <20220425024418.8415-1-jasowang@redhat.com>
MIME-Version: 1.0
Content-type: text/plain
Content-Transfer-Encoding: 8bit
Precedence: bulk

Simply synchronize the platform irq that is used by us.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/virtio/virtio_mmio.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 56128b9c46eb..4a3b66e4e198 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -345,6 +345,14 @@ static void vm_del_vqs(struct virtio_device *vdev)
 	free_irq(platform_get_irq(vm_dev->pdev, 0), vm_dev);
 }
 
+
+static void vm_synchronize_cbs(struct virtio_device *vdev)
+{
+	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
+
+	synchronize_irq(platform_get_irq(vm_dev->pdev, 0));
+}
+
 static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index,
 				  void (*callback)(struct virtqueue *vq),
 				  const char *name, bool ctx)
@@ -541,6 +549,7 @@ static const struct virtio_config_ops virtio_mmio_config_ops = {
 	.finalize_features = vm_finalize_features,
 	.bus_name	= vm_bus_name,
 	.get_shm_region = vm_get_shm_region,
+	.synchronize_cbs = vm_synchronize_cbs,
 };
 
 
-- 
2.25.1