From: Yi Liu <yi.l.liu@intel.com> To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com Cc: joro@8bytes.org, robin.murphy@arm.com, cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com, lulu@redhat.com, suravee.suthikulpanit@amd.com, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org, xudong.hao@intel.com, yan.y.zhao@intel.com, terrence.xu@intel.com, yanting.jiang@intel.com Subject: [PATCH v8 01/24] vfio: Allocate per device file structure Date: Mon, 27 Mar 2023 02:40:24 -0700 [thread overview] Message-ID: <20230327094047.47215-2-yi.l.liu@intel.com> (raw) In-Reply-To: <20230327094047.47215-1-yi.l.liu@intel.com> This is preparation for adding vfio device cdev support. vfio device cdev requires: 1) A per device file memory to store the kvm pointer set by KVM. It will be propagated to vfio_device:kvm after the device cdev file is bound to an iommufd. 2) A mechanism to block device access through device cdev fd before it is bound to an iommufd. To address above requirements, this adds a per device file structure named vfio_device_file. For now, it's only a wrapper of struct vfio_device pointer. Other fields will be added to this per file structure in future commits. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Tested-by: Terrence Xu <terrence.xu@intel.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> --- drivers/vfio/group.c | 13 +++++++++++-- drivers/vfio/vfio.h | 6 ++++++ drivers/vfio/vfio_main.c | 35 ++++++++++++++++++++++++++++------- 3 files changed, 45 insertions(+), 9 deletions(-) diff --git a/drivers/vfio/group.c b/drivers/vfio/group.c index d0c95d033605..8a13cea43f49 100644 --- a/drivers/vfio/group.c +++ b/drivers/vfio/group.c @@ -218,19 +218,26 @@ void vfio_device_group_close(struct vfio_device *device) static struct file *vfio_device_open_file(struct vfio_device *device) { + struct vfio_device_file *df; struct file *filep; int ret; + df = vfio_allocate_device_file(device); + if (IS_ERR(df)) { + ret = PTR_ERR(df); + goto err_out; + } + ret = vfio_device_group_open(device); if (ret) - goto err_out; + goto err_free; /* * We can't use anon_inode_getfd() because we need to modify * the f_mode flags directly to allow more than just ioctls */ filep = anon_inode_getfile("[vfio-device]", &vfio_device_fops, - device, O_RDWR); + df, O_RDWR); if (IS_ERR(filep)) { ret = PTR_ERR(filep); goto err_close_device; @@ -254,6 +261,8 @@ static struct file *vfio_device_open_file(struct vfio_device *device) err_close_device: vfio_device_group_close(device); +err_free: + kfree(df); err_out: return ERR_PTR(ret); } diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index c0aeea24fbd6..250fbd3786c5 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -16,11 +16,17 @@ struct iommufd_ctx; struct iommu_group; struct vfio_container; +struct vfio_device_file { + struct vfio_device *device; +}; + void vfio_device_put_registration(struct vfio_device *device); bool vfio_device_try_get_registration(struct vfio_device *device); int vfio_device_open(struct vfio_device *device, struct iommufd_ctx *iommufd); void vfio_device_close(struct vfio_device *device, struct iommufd_ctx *iommufd); +struct vfio_device_file * +vfio_allocate_device_file(struct vfio_device *device); extern const struct file_operations vfio_device_fops; diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index ebbb6b91a498..89722bf87edc 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -404,6 +404,20 @@ static bool vfio_assert_device_open(struct vfio_device *device) return !WARN_ON_ONCE(!READ_ONCE(device->open_count)); } +struct vfio_device_file * +vfio_allocate_device_file(struct vfio_device *device) +{ + struct vfio_device_file *df; + + df = kzalloc(sizeof(*df), GFP_KERNEL_ACCOUNT); + if (!df) + return ERR_PTR(-ENOMEM); + + df->device = device; + + return df; +} + static int vfio_device_first_open(struct vfio_device *device, struct iommufd_ctx *iommufd) { @@ -517,12 +531,15 @@ static inline void vfio_device_pm_runtime_put(struct vfio_device *device) */ static int vfio_device_fops_release(struct inode *inode, struct file *filep) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; vfio_device_group_close(device); vfio_device_put_registration(device); + kfree(df); + return 0; } @@ -1087,7 +1104,8 @@ static int vfio_ioctl_device_feature(struct vfio_device *device, static long vfio_device_fops_unl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; int ret; ret = vfio_device_pm_runtime_get(device); @@ -1114,7 +1132,8 @@ static long vfio_device_fops_unl_ioctl(struct file *filep, static ssize_t vfio_device_fops_read(struct file *filep, char __user *buf, size_t count, loff_t *ppos) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->read)) return -EINVAL; @@ -1126,7 +1145,8 @@ static ssize_t vfio_device_fops_write(struct file *filep, const char __user *buf, size_t count, loff_t *ppos) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->write)) return -EINVAL; @@ -1136,7 +1156,8 @@ static ssize_t vfio_device_fops_write(struct file *filep, static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->mmap)) return -EINVAL; @@ -1156,11 +1177,11 @@ const struct file_operations vfio_device_fops = { static struct vfio_device *vfio_device_from_file(struct file *file) { - struct vfio_device *device = file->private_data; + struct vfio_device_file *df = file->private_data; if (file->f_op != &vfio_device_fops) return NULL; - return device; + return df->device; } /** -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Yi Liu <yi.l.liu@intel.com> To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com Cc: mjrosato@linux.ibm.com, jasowang@redhat.com, xudong.hao@intel.com, peterx@redhat.com, terrence.xu@intel.com, chao.p.peng@linux.intel.com, linux-s390@vger.kernel.org, yi.l.liu@intel.com, kvm@vger.kernel.org, lulu@redhat.com, yanting.jiang@intel.com, joro@8bytes.org, nicolinc@nvidia.com, yan.y.zhao@intel.com, intel-gfx@lists.freedesktop.org, eric.auger@redhat.com, intel-gvt-dev@lists.freedesktop.org, yi.y.sun@linux.intel.com, cohuck@redhat.com, shameerali.kolothum.thodi@huawei.com, suravee.suthikulpanit@amd.com, robin.murphy@arm.com Subject: [Intel-gfx] [PATCH v8 01/24] vfio: Allocate per device file structure Date: Mon, 27 Mar 2023 02:40:24 -0700 [thread overview] Message-ID: <20230327094047.47215-2-yi.l.liu@intel.com> (raw) In-Reply-To: <20230327094047.47215-1-yi.l.liu@intel.com> This is preparation for adding vfio device cdev support. vfio device cdev requires: 1) A per device file memory to store the kvm pointer set by KVM. It will be propagated to vfio_device:kvm after the device cdev file is bound to an iommufd. 2) A mechanism to block device access through device cdev fd before it is bound to an iommufd. To address above requirements, this adds a per device file structure named vfio_device_file. For now, it's only a wrapper of struct vfio_device pointer. Other fields will be added to this per file structure in future commits. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Tested-by: Terrence Xu <terrence.xu@intel.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> --- drivers/vfio/group.c | 13 +++++++++++-- drivers/vfio/vfio.h | 6 ++++++ drivers/vfio/vfio_main.c | 35 ++++++++++++++++++++++++++++------- 3 files changed, 45 insertions(+), 9 deletions(-) diff --git a/drivers/vfio/group.c b/drivers/vfio/group.c index d0c95d033605..8a13cea43f49 100644 --- a/drivers/vfio/group.c +++ b/drivers/vfio/group.c @@ -218,19 +218,26 @@ void vfio_device_group_close(struct vfio_device *device) static struct file *vfio_device_open_file(struct vfio_device *device) { + struct vfio_device_file *df; struct file *filep; int ret; + df = vfio_allocate_device_file(device); + if (IS_ERR(df)) { + ret = PTR_ERR(df); + goto err_out; + } + ret = vfio_device_group_open(device); if (ret) - goto err_out; + goto err_free; /* * We can't use anon_inode_getfd() because we need to modify * the f_mode flags directly to allow more than just ioctls */ filep = anon_inode_getfile("[vfio-device]", &vfio_device_fops, - device, O_RDWR); + df, O_RDWR); if (IS_ERR(filep)) { ret = PTR_ERR(filep); goto err_close_device; @@ -254,6 +261,8 @@ static struct file *vfio_device_open_file(struct vfio_device *device) err_close_device: vfio_device_group_close(device); +err_free: + kfree(df); err_out: return ERR_PTR(ret); } diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index c0aeea24fbd6..250fbd3786c5 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -16,11 +16,17 @@ struct iommufd_ctx; struct iommu_group; struct vfio_container; +struct vfio_device_file { + struct vfio_device *device; +}; + void vfio_device_put_registration(struct vfio_device *device); bool vfio_device_try_get_registration(struct vfio_device *device); int vfio_device_open(struct vfio_device *device, struct iommufd_ctx *iommufd); void vfio_device_close(struct vfio_device *device, struct iommufd_ctx *iommufd); +struct vfio_device_file * +vfio_allocate_device_file(struct vfio_device *device); extern const struct file_operations vfio_device_fops; diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index ebbb6b91a498..89722bf87edc 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -404,6 +404,20 @@ static bool vfio_assert_device_open(struct vfio_device *device) return !WARN_ON_ONCE(!READ_ONCE(device->open_count)); } +struct vfio_device_file * +vfio_allocate_device_file(struct vfio_device *device) +{ + struct vfio_device_file *df; + + df = kzalloc(sizeof(*df), GFP_KERNEL_ACCOUNT); + if (!df) + return ERR_PTR(-ENOMEM); + + df->device = device; + + return df; +} + static int vfio_device_first_open(struct vfio_device *device, struct iommufd_ctx *iommufd) { @@ -517,12 +531,15 @@ static inline void vfio_device_pm_runtime_put(struct vfio_device *device) */ static int vfio_device_fops_release(struct inode *inode, struct file *filep) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; vfio_device_group_close(device); vfio_device_put_registration(device); + kfree(df); + return 0; } @@ -1087,7 +1104,8 @@ static int vfio_ioctl_device_feature(struct vfio_device *device, static long vfio_device_fops_unl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; int ret; ret = vfio_device_pm_runtime_get(device); @@ -1114,7 +1132,8 @@ static long vfio_device_fops_unl_ioctl(struct file *filep, static ssize_t vfio_device_fops_read(struct file *filep, char __user *buf, size_t count, loff_t *ppos) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->read)) return -EINVAL; @@ -1126,7 +1145,8 @@ static ssize_t vfio_device_fops_write(struct file *filep, const char __user *buf, size_t count, loff_t *ppos) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->write)) return -EINVAL; @@ -1136,7 +1156,8 @@ static ssize_t vfio_device_fops_write(struct file *filep, static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma) { - struct vfio_device *device = filep->private_data; + struct vfio_device_file *df = filep->private_data; + struct vfio_device *device = df->device; if (unlikely(!device->ops->mmap)) return -EINVAL; @@ -1156,11 +1177,11 @@ const struct file_operations vfio_device_fops = { static struct vfio_device *vfio_device_from_file(struct file *file) { - struct vfio_device *device = file->private_data; + struct vfio_device_file *df = file->private_data; if (file->f_op != &vfio_device_fops) return NULL; - return device; + return df->device; } /** -- 2.34.1
next prev parent reply other threads:[~2023-03-27 9:40 UTC|newest] Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-27 9:40 [PATCH v8 00/24] Add vfio_device cdev for iommufd support Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` Yi Liu [this message] 2023-03-27 9:40 ` [Intel-gfx] [PATCH v8 01/24] vfio: Allocate per device file structure Yi Liu 2023-03-27 9:40 ` [PATCH v8 02/24] vfio: Refine vfio file kAPIs for KVM Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 03/24] vfio: Remove vfio_file_is_group() Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-30 23:50 ` Jason Gunthorpe 2023-03-30 23:50 ` [Intel-gfx] " Jason Gunthorpe 2023-03-27 9:40 ` [PATCH v8 04/24] vfio: Accept vfio device file in the KVM facing kAPI Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 05/24] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 06/24] kvm/vfio: Accept vfio device file from userspace Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 07/24] vfio: Pass struct vfio_device_file * to vfio_device_open/close() Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 08/24] vfio: Block device access via device fd until device is opened Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-28 21:33 ` Alex Williamson 2023-03-28 21:33 ` Alex Williamson 2023-03-29 2:23 ` Liu, Yi L 2023-03-29 2:23 ` [Intel-gfx] " Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 09/24] vfio: Add cdev_device_open_cnt to vfio_group Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 10/24] vfio: Make vfio_device_open() single open for device cdev path Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-30 23:52 ` Jason Gunthorpe 2023-03-30 23:52 ` [Intel-gfx] " Jason Gunthorpe 2023-03-27 9:40 ` [PATCH v8 11/24] vfio: Make vfio_device_first_open() to accept NULL iommufd for noiommu Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-30 23:56 ` Jason Gunthorpe 2023-03-30 23:56 ` [Intel-gfx] " Jason Gunthorpe 2023-03-27 9:40 ` [PATCH v8 12/24] vfio-iommufd: Move noiommu support out of vfio_iommufd_bind() Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 13/24] vfio-iommufd: Split bind/attach into two steps Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 14/24] vfio: Record devid in vfio_device_file Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 15/24] vfio-iommufd: Add detach_ioas support for physical VFIO devices Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 16/24] iommufd/device: Add iommufd_access_detach() API Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-28 2:23 ` Jon Pan-Doh 2023-03-28 2:23 ` [Intel-gfx] " Jon Pan-Doh 2023-03-28 15:54 ` Nicolin Chen 2023-03-28 15:54 ` [Intel-gfx] " Nicolin Chen 2023-03-29 2:24 ` Liu, Yi L 2023-03-29 2:24 ` [Intel-gfx] " Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 17/24] vfio-iommufd: Add detach_ioas support for emulated VFIO devices Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-27 9:40 ` [PATCH v8 18/24] vfio: Determine noiommu in vfio_device registration Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-28 6:36 ` Tian, Kevin 2023-03-28 6:36 ` [Intel-gfx] " Tian, Kevin 2023-03-27 9:40 ` [PATCH v8 19/24] vfio: Name noiommu vfio_device with "noiommu-" prefix Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-28 6:37 ` Tian, Kevin 2023-03-28 6:37 ` [Intel-gfx] " Tian, Kevin 2023-03-27 9:40 ` [PATCH v8 20/24] vfio: Add cdev for vfio_device Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-29 19:57 ` Alex Williamson 2023-03-29 19:57 ` [Intel-gfx] " Alex Williamson 2023-03-30 5:35 ` Liu, Yi L 2023-03-30 5:35 ` [Intel-gfx] " Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 21/24] vfio: Add VFIO_DEVICE_BIND_IOMMUFD Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-29 21:00 ` Alex Williamson 2023-03-29 21:00 ` Alex Williamson 2023-03-29 23:22 ` Jason Gunthorpe 2023-03-29 23:22 ` [Intel-gfx] " Jason Gunthorpe 2023-03-30 12:52 ` Liu, Yi L 2023-03-30 12:52 ` [Intel-gfx] " Liu, Yi L 2023-03-30 12:59 ` Jason Gunthorpe 2023-03-30 12:59 ` [Intel-gfx] " Jason Gunthorpe 2023-03-30 7:09 ` Liu, Yi L 2023-03-30 7:09 ` [Intel-gfx] " Liu, Yi L 2023-03-30 11:52 ` Jason Gunthorpe 2023-03-30 11:52 ` Jason Gunthorpe 2023-03-30 12:53 ` Liu, Yi L 2023-03-30 12:53 ` [Intel-gfx] " Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 22/24] vfio: Add VFIO_DEVICE_AT[DE]TACH_IOMMUFD_PT Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-29 21:19 ` Alex Williamson 2023-03-29 21:19 ` [Intel-gfx] " Alex Williamson 2023-03-30 13:02 ` Liu, Yi L 2023-03-30 13:02 ` Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 23/24] vfio: Compile group optionally Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-29 21:51 ` Alex Williamson 2023-03-29 21:51 ` Alex Williamson 2023-03-30 13:06 ` Liu, Yi L 2023-03-30 13:06 ` [Intel-gfx] " Liu, Yi L 2023-03-27 9:40 ` [PATCH v8 24/24] docs: vfio: Add vfio device cdev description Yi Liu 2023-03-27 9:40 ` [Intel-gfx] " Yi Liu 2023-03-29 22:47 ` Alex Williamson 2023-03-29 22:47 ` Alex Williamson 2023-03-29 22:57 ` Alex Williamson 2023-03-29 22:57 ` [Intel-gfx] " Alex Williamson 2023-03-30 13:11 ` Liu, Yi L 2023-03-30 13:11 ` [Intel-gfx] " Liu, Yi L 2023-03-27 12:03 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Add vfio_device cdev for iommufd support (rev9) Patchwork 2023-03-27 17:48 ` [Intel-gfx] [PATCH v8 00/24] Add vfio_device cdev for iommufd support Nicolin Chen 2023-03-27 17:48 ` Nicolin Chen 2023-03-28 23:16 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Add vfio_device cdev for iommufd support (rev10) Patchwork 2023-03-31 3:10 ` [PATCH v8 00/24] Add vfio_device cdev for iommufd support Jiang, Yanting 2023-03-31 3:10 ` [Intel-gfx] " Jiang, Yanting 2023-03-31 5:01 ` Jiang, Yanting 2023-03-31 5:01 ` [Intel-gfx] " Jiang, Yanting
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