From 5dd8165f1754e156a0f9fb16c7a6bfa90e99ed60 Mon Sep 17 00:00:00 2001 From: Arthur Hanson Rasmusson Date: Mon, 14 Sep 2026 06:43:11 -0400 Subject: VFIO device registration fix + IOMMUFD callbacks + VFIO ioctl handlers - Removed IOMMU group addition before vfio_register_emulated_iommu_dev() in nv_vgpu_mdev_create() - Added IOMMUFD callbacks (bind_iommufd, unbind_iommufd, attach_ioas, detach_ioas) using kernel's vfio_iommufd_emulated_* functions - Implemented VFIO ioctl handlers: GET_INFO, GET_REGION_INFO, GET_IRQ_INFO, SET_IRQS, MMAP - Added config space read/write handlers at offset 0x70000000000 - Mmap handler for config space, BAR0 (emulation shadow), BAR1-5 (physical VRAM/registers) - Interrupt handler for VFIO_DEVICE_SET_IRQS (DATA_EVENTFD, DATA_NONE, DATA_BOOL) - Added udev rules for vfio group permissions - Created stack_manager.sh unified tool - Fixed mdev remove crash with deferred cleanup in vfio_device_release callback - Kernel 6.8+ IOMMUFD compatibility - QEMU launches successfully with vGPU passthrough --- kernel/include/nvidia-vgpu-vfio.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'kernel/include') diff --git a/kernel/include/nvidia-vgpu-vfio.h b/kernel/include/nvidia-vgpu-vfio.h index 7f778ee..3ca5cf6 100644 --- a/kernel/include/nvidia-vgpu-vfio.h +++ b/kernel/include/nvidia-vgpu-vfio.h @@ -90,6 +90,9 @@ struct nv_vgpu_migration_state { }; struct nv_vgpu_device { + /* VFIO device for VFIO group - must be first for vfio_alloc_device */ + struct vfio_device vfio_dev; + struct mdev_device *mdev; struct pci_dev *pdev; struct device dev; @@ -123,9 +126,18 @@ struct nv_vgpu_device { bool dry_run; /* PCI Config Space for VFIO mdev */ - u8 pci_config[256]; + u8 pci_config[4096]; bool config_space_dirty; -}; + + /* VFIO device open/close tracking */ + atomic_t vfio_dev_open_count; + wait_queue_head_t vfio_dev_close_wait; + + /* VFIO device registration state */ + bool vfio_dev_registered; + }; + +typedef struct nv_vgpu_device nv_vgpu_device; struct nv_vgpu_driver_data { struct mutex lock; -- cgit v1.2.3