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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	will@kernel.org, maz@kernel.org, robin.murphy@arm.com,
	joro@8bytes.org, alex.williamson@redhat.com, tn@semihalf.com,
	zhukeqian1@huawei.com
Cc: jean-philippe@linaro.org, jacob.jun.pan@linux.intel.com,
	wangxingang5@huawei.com, lushenming@huawei.com,
	chenxiang66@hisilicon.com, nicoleotsuka@gmail.com,
	vivek.gautam@arm.com, vdumpa@nvidia.com, yi.l.liu@intel.com,
	vsethi@nvidia.com, zhangfei.gao@linaro.org
Subject: [PATCH v13 10/13] vfio/pci: Register and allow DMA FAULT IRQ signaling
Date: Sun, 11 Apr 2021 13:46:56 +0200	[thread overview]
Message-ID: <20210411114659.15051-11-eric.auger@redhat.com> (raw)
In-Reply-To: <20210411114659.15051-1-eric.auger@redhat.com>

Register the VFIO_IRQ_TYPE_NESTED/VFIO_IRQ_SUBTYPE_DMA_FAULT
IRQ that allows to signal a nested mode DMA fault.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v10 -> v11:
- the irq now is registered in vfio_pci_dma_fault_init()
  in case the domain is nested
---
 drivers/vfio/pci/vfio_pci.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index b3fc6ed4ed7a..72d7c667b64c 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -396,6 +396,7 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 		(struct vfio_region_dma_fault *)vdev->fault_pages;
 	struct iommu_fault *new;
 	u32 head, tail, size;
+	int ext_irq_index;
 	int ret = -EINVAL;
 
 	if (WARN_ON(!reg))
@@ -420,7 +421,19 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 	ret = 0;
 unlock:
 	mutex_unlock(&vdev->fault_queue_lock);
-	return ret;
+	if (ret)
+		return ret;
+
+	ext_irq_index = vfio_pci_get_ext_irq_index(vdev, VFIO_IRQ_TYPE_NESTED,
+						   VFIO_IRQ_SUBTYPE_DMA_FAULT);
+	if (ext_irq_index < 0)
+		return -EINVAL;
+
+	mutex_lock(&vdev->igate);
+	if (vdev->ext_irqs[ext_irq_index].trigger)
+		eventfd_signal(vdev->ext_irqs[ext_irq_index].trigger, 1);
+	mutex_unlock(&vdev->igate);
+	return 0;
 }
 
 #define DMA_FAULT_RING_LENGTH 512
@@ -475,6 +488,12 @@ static int vfio_pci_dma_fault_init(struct vfio_pci_device *vdev)
 	if (ret) /* the dma fault region is freed in vfio_pci_disable() */
 		goto out;
 
+	ret = vfio_pci_register_irq(vdev, VFIO_IRQ_TYPE_NESTED,
+				    VFIO_IRQ_SUBTYPE_DMA_FAULT,
+				    VFIO_IRQ_INFO_EVENTFD);
+	if (ret) /* the fault handler is also freed in vfio_pci_disable() */
+		goto out;
+
 	return 0;
 out:
 	kfree(vdev->fault_pages);
-- 
2.26.3

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	will@kernel.org, maz@kernel.org, robin.murphy@arm.com,
	joro@8bytes.org, alex.williamson@redhat.com, tn@semihalf.com,
	zhukeqian1@huawei.com
Cc: jean-philippe@linaro.org, wangxingang5@huawei.com,
	lushenming@huawei.com, vivek.gautam@arm.com, vsethi@nvidia.com,
	zhangfei.gao@linaro.org, jiangkunkun@huawei.com
Subject: [PATCH v13 10/13] vfio/pci: Register and allow DMA FAULT IRQ signaling
Date: Sun, 11 Apr 2021 13:46:56 +0200	[thread overview]
Message-ID: <20210411114659.15051-11-eric.auger@redhat.com> (raw)
In-Reply-To: <20210411114659.15051-1-eric.auger@redhat.com>

Register the VFIO_IRQ_TYPE_NESTED/VFIO_IRQ_SUBTYPE_DMA_FAULT
IRQ that allows to signal a nested mode DMA fault.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v10 -> v11:
- the irq now is registered in vfio_pci_dma_fault_init()
  in case the domain is nested
---
 drivers/vfio/pci/vfio_pci.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index b3fc6ed4ed7a..72d7c667b64c 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -396,6 +396,7 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 		(struct vfio_region_dma_fault *)vdev->fault_pages;
 	struct iommu_fault *new;
 	u32 head, tail, size;
+	int ext_irq_index;
 	int ret = -EINVAL;
 
 	if (WARN_ON(!reg))
@@ -420,7 +421,19 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 	ret = 0;
 unlock:
 	mutex_unlock(&vdev->fault_queue_lock);
-	return ret;
+	if (ret)
+		return ret;
+
+	ext_irq_index = vfio_pci_get_ext_irq_index(vdev, VFIO_IRQ_TYPE_NESTED,
+						   VFIO_IRQ_SUBTYPE_DMA_FAULT);
+	if (ext_irq_index < 0)
+		return -EINVAL;
+
+	mutex_lock(&vdev->igate);
+	if (vdev->ext_irqs[ext_irq_index].trigger)
+		eventfd_signal(vdev->ext_irqs[ext_irq_index].trigger, 1);
+	mutex_unlock(&vdev->igate);
+	return 0;
 }
 
 #define DMA_FAULT_RING_LENGTH 512
@@ -475,6 +488,12 @@ static int vfio_pci_dma_fault_init(struct vfio_pci_device *vdev)
 	if (ret) /* the dma fault region is freed in vfio_pci_disable() */
 		goto out;
 
+	ret = vfio_pci_register_irq(vdev, VFIO_IRQ_TYPE_NESTED,
+				    VFIO_IRQ_SUBTYPE_DMA_FAULT,
+				    VFIO_IRQ_INFO_EVENTFD);
+	if (ret) /* the fault handler is also freed in vfio_pci_disable() */
+		goto out;
+
 	return 0;
 out:
 	kfree(vdev->fault_pages);
-- 
2.26.3

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	will@kernel.org, maz@kernel.org, robin.murphy@arm.com,
	joro@8bytes.org, alex.williamson@redhat.com, tn@semihalf.com,
	zhukeqian1@huawei.com
Cc: jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com,
	wangxingang5@huawei.com, jean-philippe@linaro.org,
	zhangfei.gao@linaro.org, zhangfei.gao@gmail.com,
	vivek.gautam@arm.com, shameerali.kolothum.thodi@huawei.com,
	yuzenghui@huawei.com, nicoleotsuka@gmail.com,
	lushenming@huawei.com, vsethi@nvidia.com,
	chenxiang66@hisilicon.com, vdumpa@nvidia.com,
	jiangkunkun@huawei.com
Subject: [PATCH v13 10/13] vfio/pci: Register and allow DMA FAULT IRQ signaling
Date: Sun, 11 Apr 2021 13:46:56 +0200	[thread overview]
Message-ID: <20210411114659.15051-11-eric.auger@redhat.com> (raw)
In-Reply-To: <20210411114659.15051-1-eric.auger@redhat.com>

Register the VFIO_IRQ_TYPE_NESTED/VFIO_IRQ_SUBTYPE_DMA_FAULT
IRQ that allows to signal a nested mode DMA fault.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v10 -> v11:
- the irq now is registered in vfio_pci_dma_fault_init()
  in case the domain is nested
---
 drivers/vfio/pci/vfio_pci.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index b3fc6ed4ed7a..72d7c667b64c 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -396,6 +396,7 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 		(struct vfio_region_dma_fault *)vdev->fault_pages;
 	struct iommu_fault *new;
 	u32 head, tail, size;
+	int ext_irq_index;
 	int ret = -EINVAL;
 
 	if (WARN_ON(!reg))
@@ -420,7 +421,19 @@ vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
 	ret = 0;
 unlock:
 	mutex_unlock(&vdev->fault_queue_lock);
-	return ret;
+	if (ret)
+		return ret;
+
+	ext_irq_index = vfio_pci_get_ext_irq_index(vdev, VFIO_IRQ_TYPE_NESTED,
+						   VFIO_IRQ_SUBTYPE_DMA_FAULT);
+	if (ext_irq_index < 0)
+		return -EINVAL;
+
+	mutex_lock(&vdev->igate);
+	if (vdev->ext_irqs[ext_irq_index].trigger)
+		eventfd_signal(vdev->ext_irqs[ext_irq_index].trigger, 1);
+	mutex_unlock(&vdev->igate);
+	return 0;
 }
 
 #define DMA_FAULT_RING_LENGTH 512
@@ -475,6 +488,12 @@ static int vfio_pci_dma_fault_init(struct vfio_pci_device *vdev)
 	if (ret) /* the dma fault region is freed in vfio_pci_disable() */
 		goto out;
 
+	ret = vfio_pci_register_irq(vdev, VFIO_IRQ_TYPE_NESTED,
+				    VFIO_IRQ_SUBTYPE_DMA_FAULT,
+				    VFIO_IRQ_INFO_EVENTFD);
+	if (ret) /* the fault handler is also freed in vfio_pci_disable() */
+		goto out;
+
 	return 0;
 out:
 	kfree(vdev->fault_pages);
-- 
2.26.3


  parent reply	other threads:[~2021-04-11 11:49 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-11 11:46 [PATCH v13 00/13] SMMUv3 Nested Stage Setup (VFIO part) Eric Auger
2021-04-11 11:46 ` Eric Auger
2021-04-11 11:46 ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 01/13] vfio: VFIO_IOMMU_SET_PASID_TABLE Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 14:12   ` kernel test robot
2021-04-11 14:12     ` kernel test robot
2021-04-11 14:12     ` kernel test robot
2021-04-11 14:12     ` kernel test robot
2021-04-11 14:35   ` kernel test robot
2021-04-11 14:35     ` kernel test robot
2021-04-11 14:35     ` kernel test robot
2021-04-11 14:35     ` kernel test robot
2021-04-11 11:46 ` [PATCH v13 02/13] vfio: VFIO_IOMMU_CACHE_INVALIDATE Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 03/13] vfio: VFIO_IOMMU_SET_MSI_BINDING Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 15:28   ` kernel test robot
2021-04-11 15:28     ` kernel test robot
2021-04-11 15:28     ` kernel test robot
2021-04-11 15:28     ` kernel test robot
2021-04-11 11:46 ` [PATCH v13 04/13] vfio/pci: Add VFIO_REGION_TYPE_NESTED region type Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 05/13] vfio/pci: Register an iommu fault handler Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 06/13] vfio/pci: Allow to mmap the fault queue Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 07/13] vfio: Use capability chains to handle device specific irq Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 08/13] vfio/pci: Add framework for custom interrupt indices Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 09/13] vfio: Add new IRQ for DMA fault reporting Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` Eric Auger [this message]
2021-04-11 11:46   ` [PATCH v13 10/13] vfio/pci: Register and allow DMA FAULT IRQ signaling Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 11/13] vfio: Document nested stage control Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 12/13] vfio/pci: Register a DMA fault response region Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46 ` [PATCH v13 13/13] vfio/pci: Inject page response upon response region fill Eric Auger
2021-04-11 11:46   ` Eric Auger
2021-04-11 11:46   ` Eric Auger

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