From: Nicolin Chen <nicolinc@nvidia.com>
To: <will@kernel.org>, <robin.murphy@arm.com>, <joro@8bytes.org>,
<alex.williamson@redhat.com>, <cohuck@redhat.com>,
<corbet@lwn.net>
Cc: <nicoleotsuka@gmail.com>, <vdumpa@nvidia.com>,
<thierry.reding@gmail.com>, <linux-tegra@vger.kernel.org>,
<nwatterson@nvidia.com>, <Jonathan.Cameron@huawei.com>,
<jean-philippe@linaro.org>, <song.bao.hua@hisilicon.com>,
<eric.auger@redhat.com>, <thunder.leizhen@huawei.com>,
<yuzenghui@huawei.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>, <kvm@vger.kernel.org>,
<linux-doc@vger.kernel.org>
Subject: [RFC][PATCH v2 05/13] vfio/type1: Implement set_vmid and get_vmid
Date: Mon, 30 Aug 2021 19:59:15 -0700 [thread overview]
Message-ID: <20210831025923.15812-6-nicolinc@nvidia.com> (raw)
In-Reply-To: <20210831025923.15812-1-nicolinc@nvidia.com>
Now we have a pair of ->set_vmid() and ->get_vmid() function
pointers. This patch implements them, to exchange VMID value
between vfio container and vfio_iommu_type1.
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
drivers/vfio/vfio_iommu_type1.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 0e9217687f5c..bb5d949bc1af 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -74,6 +74,7 @@ struct vfio_iommu {
uint64_t pgsize_bitmap;
uint64_t num_non_pinned_groups;
wait_queue_head_t vaddr_wait;
+ uint32_t vmid;
bool v2;
bool nesting;
bool dirty_page_tracking;
@@ -2674,6 +2675,7 @@ static void *vfio_iommu_type1_open(unsigned long arg)
iommu->dma_list = RB_ROOT;
iommu->dma_avail = dma_entry_limit;
iommu->container_open = true;
+ iommu->vmid = VFIO_IOMMU_VMID_INVALID;
mutex_init(&iommu->lock);
BLOCKING_INIT_NOTIFIER_HEAD(&iommu->notifier);
init_waitqueue_head(&iommu->vaddr_wait);
@@ -3255,6 +3257,27 @@ static void vfio_iommu_type1_notify(void *iommu_data,
wake_up_all(&iommu->vaddr_wait);
}
+static int vfio_iommu_type1_get_vmid(void *iommu_data, u32 *vmid)
+{
+ struct vfio_iommu *iommu = iommu_data;
+
+ *vmid = iommu->vmid;
+
+ return 0;
+}
+
+static int vfio_iommu_type1_set_vmid(void *iommu_data, u32 vmid)
+{
+ struct vfio_iommu *iommu = iommu_data;
+
+ if (vmid == VFIO_IOMMU_VMID_INVALID)
+ return -EINVAL;
+
+ iommu->vmid = vmid;
+
+ return 0;
+}
+
static const struct vfio_iommu_driver_ops vfio_iommu_driver_ops_type1 = {
.name = "vfio-iommu-type1",
.owner = THIS_MODULE,
@@ -3270,6 +3293,8 @@ static const struct vfio_iommu_driver_ops vfio_iommu_driver_ops_type1 = {
.dma_rw = vfio_iommu_type1_dma_rw,
.group_iommu_domain = vfio_iommu_type1_group_iommu_domain,
.notify = vfio_iommu_type1_notify,
+ .set_vmid = vfio_iommu_type1_set_vmid,
+ .get_vmid = vfio_iommu_type1_get_vmid,
};
static int __init vfio_iommu_type1_init(void)
--
2.17.1
next prev parent reply other threads:[~2021-08-31 3:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 2:59 [RFC][PATCH v2 00/13] iommu/arm-smmu-v3: Add NVIDIA implementation Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 01/13] iommu: Add set_nesting_vmid/get_nesting_vmid functions Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 02/13] vfio: add VFIO_IOMMU_GET_VMID and VFIO_IOMMU_SET_VMID Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 03/13] vfio: Document VMID control for IOMMU Virtualization Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 04/13] vfio: add set_vmid and get_vmid for vfio_iommu_type1 Nicolin Chen
2021-08-31 2:59 ` Nicolin Chen [this message]
2021-08-31 2:59 ` [RFC][PATCH v2 06/13] vfio/type1: Set/get VMID to/from iommu driver Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 07/13] iommu/arm-smmu-v3: Add shared VMID support for NESTING Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 08/13] iommu/arm-smmu-v3: Add VMID alloc/free helpers Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 09/13] iommu/arm-smmu-v3: Pass dev pointer to arm_smmu_detach_dev Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 10/13] iommu/arm-smmu-v3: Pass cmdq pointer in arm_smmu_cmdq_issue_cmdlist() Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 11/13] iommu/arm-smmu-v3: Add implementation infrastructure Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 12/13] iommu/arm-smmu-v3: Add support for NVIDIA CMDQ-Virtualization hw Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 13/13] iommu/nvidia-smmu-v3: Add mdev interface support Nicolin Chen
2021-08-31 16:15 ` [RFC][PATCH v2 00/13] iommu/arm-smmu-v3: Add NVIDIA implementation Alex Williamson
2021-09-01 6:55 ` Tian, Kevin
2021-09-02 14:45 ` Jason Gunthorpe
2021-09-02 22:27 ` Tian, Kevin
2021-09-16 18:21 ` Nicolin Chen
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