Since the core function signature changes it has to flow up to all drivers.
Reviewed-by: Kevin Tian <[email protected]> Reviewed-by: Pranjal Shrivastava <[email protected]> Reviewed-by: Brett Creeley <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]> --- .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 30 ++--- drivers/vfio/pci/mlx5/main.c | 2 +- drivers/vfio/pci/nvgrace-gpu/main.c | 51 ++------- drivers/vfio/pci/pds/vfio_dev.c | 2 +- drivers/vfio/pci/qat/main.c | 2 +- drivers/vfio/pci/vfio_pci.c | 2 +- drivers/vfio/pci/vfio_pci_core.c | 103 +++++++----------- drivers/vfio/pci/virtio/common.h | 3 +- drivers/vfio/pci/virtio/legacy_io.c | 26 ++--- drivers/vfio/pci/virtio/main.c | 6 +- include/linux/vfio_pci_core.h | 3 +- 11 files changed, 80 insertions(+), 150 deletions(-) diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c index 559b12c3d67493..8915eb4943e46a 100644 --- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c +++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c @@ -1325,38 +1325,28 @@ static ssize_t hisi_acc_vfio_pci_read(struct vfio_device *core_vdev, } static int hisi_acc_vfio_ioctl_get_region(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg) + struct vfio_region_info *info, + struct vfio_info_cap *caps) { struct vfio_pci_core_device *vdev = container_of(core_vdev, struct vfio_pci_core_device, vdev); struct pci_dev *pdev = vdev->pdev; - struct vfio_region_info info; - unsigned long minsz; - minsz = offsetofend(struct vfio_region_info, offset); + if (info->index != VFIO_PCI_BAR2_REGION_INDEX) + return vfio_pci_ioctl_get_region_info(core_vdev, info, caps); - if (copy_from_user(&info, arg, minsz)) - return -EFAULT; - - if (info.argsz < minsz) - return -EINVAL; - - if (info.index != VFIO_PCI_BAR2_REGION_INDEX) - return vfio_pci_ioctl_get_region_info(core_vdev, arg); - - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); /* * ACC VF dev BAR2 region consists of both functional * register space and migration control register space. * Report only the functional region to Guest. */ - info.size = pci_resource_len(pdev, info.index) / 2; + info->size = pci_resource_len(pdev, info->index) / 2; - info.flags = VFIO_REGION_INFO_FLAG_READ | VFIO_REGION_INFO_FLAG_WRITE | + info->flags = VFIO_REGION_INFO_FLAG_READ | VFIO_REGION_INFO_FLAG_WRITE | VFIO_REGION_INFO_FLAG_MMAP; - - return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; + return 0; } static int hisi_acc_vf_debug_check(struct seq_file *seq, struct vfio_device *vdev) @@ -1554,7 +1544,7 @@ static const struct vfio_device_ops hisi_acc_vfio_pci_migrn_ops = { .open_device = hisi_acc_vfio_pci_open_device, .close_device = hisi_acc_vfio_pci_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = hisi_acc_vfio_ioctl_get_region, + .get_region_info_caps = hisi_acc_vfio_ioctl_get_region, .device_feature = vfio_pci_core_ioctl_feature, .read = hisi_acc_vfio_pci_read, .write = hisi_acc_vfio_pci_write, @@ -1574,7 +1564,7 @@ static const struct vfio_device_ops hisi_acc_vfio_pci_ops = { .open_device = hisi_acc_vfio_pci_open_device, .close_device = vfio_pci_core_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/drivers/vfio/pci/mlx5/main.c b/drivers/vfio/pci/mlx5/main.c index b7f941f8047ea4..9c5970411d07a1 100644 --- a/drivers/vfio/pci/mlx5/main.c +++ b/drivers/vfio/pci/mlx5/main.c @@ -1366,7 +1366,7 @@ static const struct vfio_device_ops mlx5vf_pci_ops = { .open_device = mlx5vf_pci_open_device, .close_device = mlx5vf_pci_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/drivers/vfio/pci/nvgrace-gpu/main.c b/drivers/vfio/pci/nvgrace-gpu/main.c index cab743a30dc35d..5a6f77d5c81e0f 100644 --- a/drivers/vfio/pci/nvgrace-gpu/main.c +++ b/drivers/vfio/pci/nvgrace-gpu/main.c @@ -205,34 +205,25 @@ static int nvgrace_gpu_mmap(struct vfio_device *core_vdev, return 0; } -static int -nvgrace_gpu_ioctl_get_region_info(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg) +static int nvgrace_gpu_ioctl_get_region_info(struct vfio_device *core_vdev, + struct vfio_region_info *info, + struct vfio_info_cap *caps) { struct nvgrace_gpu_pci_core_device *nvdev = container_of(core_vdev, struct nvgrace_gpu_pci_core_device, core_device.vdev); - unsigned long minsz = offsetofend(struct vfio_region_info, offset); - struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; struct vfio_region_info_cap_sparse_mmap *sparse; - struct vfio_region_info info; struct mem_region *memregion; u32 size; int ret; - if (copy_from_user(&info, arg, minsz)) - return -EFAULT; - - if (info.argsz < minsz) - return -EINVAL; - /* * Request to determine the BAR region information. Send the * GPU memory information. */ - memregion = nvgrace_gpu_memregion(info.index, nvdev); + memregion = nvgrace_gpu_memregion(info->index, nvdev); if (!memregion) - return vfio_pci_ioctl_get_region_info(core_vdev, arg); + return vfio_pci_ioctl_get_region_info(core_vdev, info, caps); size = struct_size(sparse, areas, 1); @@ -251,40 +242,22 @@ nvgrace_gpu_ioctl_get_region_info(struct vfio_device *core_vdev, sparse->header.id = VFIO_REGION_INFO_CAP_SPARSE_MMAP; sparse->header.version = 1; - ret = vfio_info_add_capability(&caps, &sparse->header, size); + ret = vfio_info_add_capability(caps, &sparse->header, size); kfree(sparse); if (ret) return ret; - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); /* * The region memory size may not be power-of-2 aligned. * Given that the memory is a BAR and may not be * aligned, roundup to the next power-of-2. */ - info.size = memregion->bar_size; - info.flags = VFIO_REGION_INFO_FLAG_READ | + info->size = memregion->bar_size; + info->flags = VFIO_REGION_INFO_FLAG_READ | VFIO_REGION_INFO_FLAG_WRITE | VFIO_REGION_INFO_FLAG_MMAP; - - if (caps.size) { - info.flags |= VFIO_REGION_INFO_FLAG_CAPS; - if (info.argsz < sizeof(info) + caps.size) { - info.argsz = sizeof(info) + caps.size; - info.cap_offset = 0; - } else { - vfio_info_cap_shift(&caps, sizeof(info)); - if (copy_to_user((void __user *)arg + - sizeof(info), caps.buf, - caps.size)) { - kfree(caps.buf); - return -EFAULT; - } - info.cap_offset = sizeof(info); - } - kfree(caps.buf); - } - return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; + return 0; } static long nvgrace_gpu_ioctl(struct vfio_device *core_vdev, @@ -686,7 +659,7 @@ static const struct vfio_device_ops nvgrace_gpu_pci_ops = { .open_device = nvgrace_gpu_open_device, .close_device = nvgrace_gpu_close_device, .ioctl = nvgrace_gpu_ioctl, - .get_region_info = nvgrace_gpu_ioctl_get_region_info, + .get_region_info_caps = nvgrace_gpu_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = nvgrace_gpu_read, .write = nvgrace_gpu_write, @@ -707,7 +680,7 @@ static const struct vfio_device_ops nvgrace_gpu_pci_core_ops = { .open_device = nvgrace_gpu_open_device, .close_device = vfio_pci_core_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/drivers/vfio/pci/pds/vfio_dev.c b/drivers/vfio/pci/pds/vfio_dev.c index 1946bc75d99b49..be103c74e96957 100644 --- a/drivers/vfio/pci/pds/vfio_dev.c +++ b/drivers/vfio/pci/pds/vfio_dev.c @@ -195,7 +195,7 @@ static const struct vfio_device_ops pds_vfio_ops = { .open_device = pds_vfio_open_device, .close_device = pds_vfio_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/drivers/vfio/pci/qat/main.c b/drivers/vfio/pci/qat/main.c index 8452d9c1d11d3a..8fbdf7c6d666e1 100644 --- a/drivers/vfio/pci/qat/main.c +++ b/drivers/vfio/pci/qat/main.c @@ -609,7 +609,7 @@ static const struct vfio_device_ops qat_vf_pci_ops = { .open_device = qat_vf_pci_open_device, .close_device = qat_vf_pci_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .read = vfio_pci_core_read, .write = vfio_pci_core_write, .mmap = vfio_pci_core_mmap, diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 2d9122efc10baa..a3e49d42c771bc 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -132,7 +132,7 @@ static const struct vfio_device_ops vfio_pci_ops = { .open_device = vfio_pci_open_device, .close_device = vfio_pci_core_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index f21d9026068c37..57c0766fb9f80f 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -997,43 +997,35 @@ static int vfio_pci_ioctl_get_info(struct vfio_pci_core_device *vdev, } int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg) + struct vfio_region_info *info, + struct vfio_info_cap *caps) { struct vfio_pci_core_device *vdev = container_of(core_vdev, struct vfio_pci_core_device, vdev); - unsigned long minsz = offsetofend(struct vfio_region_info, offset); struct pci_dev *pdev = vdev->pdev; - struct vfio_region_info info; - struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; int i, ret; - if (copy_from_user(&info, arg, minsz)) - return -EFAULT; - - if (info.argsz < minsz) - return -EINVAL; - - switch (info.index) { + switch (info->index) { case VFIO_PCI_CONFIG_REGION_INDEX: - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.size = pdev->cfg_size; - info.flags = VFIO_REGION_INFO_FLAG_READ | - VFIO_REGION_INFO_FLAG_WRITE; + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->size = pdev->cfg_size; + info->flags = VFIO_REGION_INFO_FLAG_READ | + VFIO_REGION_INFO_FLAG_WRITE; break; case VFIO_PCI_BAR0_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.size = pci_resource_len(pdev, info.index); - if (!info.size) { - info.flags = 0; + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->size = pci_resource_len(pdev, info->index); + if (!info->size) { + info->flags = 0; break; } - info.flags = VFIO_REGION_INFO_FLAG_READ | - VFIO_REGION_INFO_FLAG_WRITE; - if (vdev->bar_mmap_supported[info.index]) { - info.flags |= VFIO_REGION_INFO_FLAG_MMAP; - if (info.index == vdev->msix_bar) { - ret = msix_mmappable_cap(vdev, &caps); + info->flags = VFIO_REGION_INFO_FLAG_READ | + VFIO_REGION_INFO_FLAG_WRITE; + if (vdev->bar_mmap_supported[info->index]) { + info->flags |= VFIO_REGION_INFO_FLAG_MMAP; + if (info->index == vdev->msix_bar) { + ret = msix_mmappable_cap(vdev, caps); if (ret) return ret; } @@ -1045,9 +1037,9 @@ int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, size_t size; u16 cmd; - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.flags = 0; - info.size = 0; + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->flags = 0; + info->size = 0; if (pci_resource_start(pdev, PCI_ROM_RESOURCE)) { /* @@ -1057,16 +1049,17 @@ int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, cmd = vfio_pci_memory_lock_and_enable(vdev); io = pci_map_rom(pdev, &size); if (io) { - info.flags = VFIO_REGION_INFO_FLAG_READ; + info->flags = VFIO_REGION_INFO_FLAG_READ; /* Report the BAR size, not the ROM size. */ - info.size = pci_resource_len(pdev, PCI_ROM_RESOURCE); + info->size = pci_resource_len(pdev, + PCI_ROM_RESOURCE); pci_unmap_rom(pdev, io); } vfio_pci_memory_unlock_and_restore(vdev, cmd); } else if (pdev->rom && pdev->romlen) { - info.flags = VFIO_REGION_INFO_FLAG_READ; + info->flags = VFIO_REGION_INFO_FLAG_READ; /* Report BAR size as power of two. */ - info.size = roundup_pow_of_two(pdev->romlen); + info->size = roundup_pow_of_two(pdev->romlen); } break; @@ -1075,10 +1068,10 @@ int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, if (!vdev->has_vga) return -EINVAL; - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.size = 0xc0000; - info.flags = VFIO_REGION_INFO_FLAG_READ | - VFIO_REGION_INFO_FLAG_WRITE; + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->size = 0xc0000; + info->flags = VFIO_REGION_INFO_FLAG_READ | + VFIO_REGION_INFO_FLAG_WRITE; break; default: { @@ -1087,52 +1080,34 @@ int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, .header.version = 1 }; - if (info.index >= VFIO_PCI_NUM_REGIONS + vdev->num_regions) + if (info->index >= VFIO_PCI_NUM_REGIONS + vdev->num_regions) return -EINVAL; - info.index = array_index_nospec( - info.index, VFIO_PCI_NUM_REGIONS + vdev->num_regions); + info->index = array_index_nospec( + info->index, VFIO_PCI_NUM_REGIONS + vdev->num_regions); - i = info.index - VFIO_PCI_NUM_REGIONS; + i = info->index - VFIO_PCI_NUM_REGIONS; - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.size = vdev->region[i].size; - info.flags = vdev->region[i].flags; + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->size = vdev->region[i].size; + info->flags = vdev->region[i].flags; cap_type.type = vdev->region[i].type; cap_type.subtype = vdev->region[i].subtype; - ret = vfio_info_add_capability(&caps, &cap_type.header, + ret = vfio_info_add_capability(caps, &cap_type.header, sizeof(cap_type)); if (ret) return ret; if (vdev->region[i].ops->add_capability) { ret = vdev->region[i].ops->add_capability( - vdev, &vdev->region[i], &caps); + vdev, &vdev->region[i], caps); if (ret) return ret; } } } - - if (caps.size) { - info.flags |= VFIO_REGION_INFO_FLAG_CAPS; - if (info.argsz < sizeof(info) + caps.size) { - info.argsz = sizeof(info) + caps.size; - info.cap_offset = 0; - } else { - vfio_info_cap_shift(&caps, sizeof(info)); - if (copy_to_user(arg + 1, caps.buf, caps.size)) { - kfree(caps.buf); - return -EFAULT; - } - info.cap_offset = sizeof(*arg); - } - - kfree(caps.buf); - } - - return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; + return 0; } EXPORT_SYMBOL_GPL(vfio_pci_ioctl_get_region_info); diff --git a/drivers/vfio/pci/virtio/common.h b/drivers/vfio/pci/virtio/common.h index a10f2d92cb6238..cb3d5e57d3a3e9 100644 --- a/drivers/vfio/pci/virtio/common.h +++ b/drivers/vfio/pci/virtio/common.h @@ -110,7 +110,8 @@ void virtiovf_migration_reset_done(struct pci_dev *pdev); #ifdef CONFIG_VIRTIO_VFIO_PCI_ADMIN_LEGACY int virtiovf_open_legacy_io(struct virtiovf_pci_core_device *virtvdev); int virtiovf_pci_ioctl_get_region_info(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg); + struct vfio_region_info *info, + struct vfio_info_cap *caps); ssize_t virtiovf_pci_core_write(struct vfio_device *core_vdev, const char __user *buf, size_t count, loff_t *ppos); diff --git a/drivers/vfio/pci/virtio/legacy_io.c b/drivers/vfio/pci/virtio/legacy_io.c index d735d5c4bd7775..1ed349a556291b 100644 --- a/drivers/vfio/pci/virtio/legacy_io.c +++ b/drivers/vfio/pci/virtio/legacy_io.c @@ -281,29 +281,19 @@ ssize_t virtiovf_pci_core_write(struct vfio_device *core_vdev, const char __user } int virtiovf_pci_ioctl_get_region_info(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg) + struct vfio_region_info *info, + struct vfio_info_cap *caps) { struct virtiovf_pci_core_device *virtvdev = container_of( core_vdev, struct virtiovf_pci_core_device, core_device.vdev); - unsigned long minsz = offsetofend(struct vfio_region_info, offset); - struct vfio_region_info info = {}; - if (copy_from_user(&info, arg, minsz)) - return -EFAULT; + if (info->index != VFIO_PCI_BAR0_REGION_INDEX) + return vfio_pci_ioctl_get_region_info(core_vdev, info, caps); - if (info.argsz < minsz) - return -EINVAL; - - switch (info.index) { - case VFIO_PCI_BAR0_REGION_INDEX: - info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); - info.size = virtvdev->bar0_virtual_buf_size; - info.flags = VFIO_REGION_INFO_FLAG_READ | - VFIO_REGION_INFO_FLAG_WRITE; - return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; - default: - return vfio_pci_ioctl_get_region_info(core_vdev, arg); - } + info->offset = VFIO_PCI_INDEX_TO_OFFSET(info->index); + info->size = virtvdev->bar0_virtual_buf_size; + info->flags = VFIO_REGION_INFO_FLAG_READ | VFIO_REGION_INFO_FLAG_WRITE; + return 0; } static int virtiovf_set_notify_addr(struct virtiovf_pci_core_device *virtvdev) diff --git a/drivers/vfio/pci/virtio/main.c b/drivers/vfio/pci/virtio/main.c index d68096bc525215..d2e5cbca13c857 100644 --- a/drivers/vfio/pci/virtio/main.c +++ b/drivers/vfio/pci/virtio/main.c @@ -88,7 +88,7 @@ static const struct vfio_device_ops virtiovf_vfio_pci_lm_ops = { .open_device = virtiovf_pci_open_device, .close_device = virtiovf_pci_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, @@ -110,7 +110,7 @@ static const struct vfio_device_ops virtiovf_vfio_pci_tran_lm_ops = { .open_device = virtiovf_pci_open_device, .close_device = virtiovf_pci_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = virtiovf_pci_ioctl_get_region_info, + .get_region_info_caps = virtiovf_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = virtiovf_pci_core_read, .write = virtiovf_pci_core_write, @@ -132,7 +132,7 @@ static const struct vfio_device_ops virtiovf_vfio_pci_ops = { .open_device = virtiovf_pci_open_device, .close_device = vfio_pci_core_close_device, .ioctl = vfio_pci_core_ioctl, - .get_region_info = vfio_pci_ioctl_get_region_info, + .get_region_info_caps = vfio_pci_ioctl_get_region_info, .device_feature = vfio_pci_core_ioctl_feature, .read = vfio_pci_core_read, .write = vfio_pci_core_write, diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h index 160bc2e31ece75..e74f94c17fbeb6 100644 --- a/include/linux/vfio_pci_core.h +++ b/include/linux/vfio_pci_core.h @@ -116,7 +116,8 @@ long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd, int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags, void __user *arg, size_t argsz); int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, - struct vfio_region_info __user *arg); + struct vfio_region_info *info, + struct vfio_info_cap *caps); ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf, size_t count, loff_t *ppos); ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf, -- 2.43.0
