linux-kernel - [PATCH RFC v1 04/11] iommu/virtio: Add a io page fault queue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210423095147.27922-5-vivek.gautam@arm.com>
Date:   Fri, 23 Apr 2021 15:21:40 +0530
From:   Vivek Gautam <vivek.gautam@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org,
        virtualization@...ts.linux-foundation.org
Cc:     joro@...tes.org, will.deacon@....com, mst@...hat.com,
        robin.murphy@....com, jean-philippe@...aro.org,
        eric.auger@...hat.com, kevin.tian@...el.com,
        jacob.jun.pan@...ux.intel.com, yi.l.liu@...el.com,
        Lorenzo.Pieralisi@....com, shameerali.kolothum.thodi@...wei.com,
        Vivek Gautam <vivek.gautam@....com>
Subject: [PATCH RFC v1 04/11] iommu/virtio: Add a io page fault queue

Add a io page fault queue to the driver so that it can be used
to redirect faults to the handler.

Signed-off-by: Vivek Gautam <vivek.gautam@....com>
---
 drivers/iommu/virtio-iommu.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index fd237cad1ce5..3da5f0807711 100644
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -58,6 +58,7 @@ struct viommu_dev {
 	struct list_head		endpoints;
 	struct workqueue_struct		*pri_wq;
 	struct viommu_dev_pri_work	*pri_work;
+	struct iopf_queue		*iopf_pri;
 
 	/* Device configuration */
 	struct iommu_domain_geometry	geometry;
@@ -581,6 +582,15 @@ static int viommu_add_pstf(struct viommu_endpoint *vdev, void *pstf, size_t len)
 	return 0;
 }
 
+static int viommu_init_queues(struct viommu_dev *viommu)
+{
+	viommu->iopf_pri = iopf_queue_alloc(dev_name(viommu->dev));
+	if (!viommu->iopf_pri)
+		return -ENOMEM;
+
+	return 0;
+}
+
 static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev)
 {
 	int ret;
@@ -670,6 +680,15 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev)
 
 	list_add(&ep->list, &viommu->endpoints);
 
+	ret = viommu_init_queues(viommu);
+	if (ret)
+		goto out_free_eps;
+
+	kfree(probe);
+	return 0;
+
+out_free_eps:
+	kfree(ep);
 out_free:
 	kfree(probe);
 	return ret;
-- 
2.17.1