diff options
| -rw-r--r-- | drivers/vfio/Kconfig | 35 | ||||
| -rw-r--r-- | drivers/vfio/Makefile | 4 | ||||
| -rw-r--r-- | drivers/vfio/vfio.h | 65 |
3 files changed, 91 insertions, 13 deletions
diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig index 1118d322eec9..286c1663bd75 100644 --- a/drivers/vfio/Kconfig +++ b/drivers/vfio/Kconfig @@ -3,8 +3,8 @@ menuconfig VFIO tristate "VFIO Non-Privileged userspace driver framework" select IOMMU_API depends on IOMMUFD || !IOMMUFD - select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64) select INTERVAL_TREE + select VFIO_CONTAINER if IOMMUFD=n help VFIO provides a framework for secure userspace device drivers. See Documentation/driver-api/vfio.rst for more details. @@ -12,6 +12,18 @@ menuconfig VFIO If you don't know what to do here, say N. if VFIO +config VFIO_CONTAINER + bool "Support for the VFIO container /dev/vfio/vfio" + select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64) + default y + help + The VFIO container is the classic interface to VFIO for establishing + IOMMU mappings. If N is selected here then IOMMUFD must be used to + manage the mappings. + + Unless testing IOMMUFD say Y here. + +if VFIO_CONTAINER config VFIO_IOMMU_TYPE1 tristate default n @@ -21,16 +33,6 @@ config VFIO_IOMMU_SPAPR_TCE depends on SPAPR_TCE_IOMMU default VFIO -config VFIO_SPAPR_EEH - tristate - depends on EEH && VFIO_IOMMU_SPAPR_TCE - default VFIO - -config VFIO_VIRQFD - tristate - select EVENTFD - default n - config VFIO_NOIOMMU bool "VFIO No-IOMMU support" help @@ -44,6 +46,17 @@ config VFIO_NOIOMMU this mode since there is no IOMMU to provide DMA translation. If you don't know what to do here, say N. +endif + +config VFIO_SPAPR_EEH + tristate + depends on EEH && VFIO_IOMMU_SPAPR_TCE + default VFIO + +config VFIO_VIRQFD + tristate + select EVENTFD + default n source "drivers/vfio/pci/Kconfig" source "drivers/vfio/platform/Kconfig" diff --git a/drivers/vfio/Makefile b/drivers/vfio/Makefile index 3863922529ef..b953517dc70f 100644 --- a/drivers/vfio/Makefile +++ b/drivers/vfio/Makefile @@ -4,9 +4,9 @@ vfio_virqfd-y := virqfd.o obj-$(CONFIG_VFIO) += vfio.o vfio-y += vfio_main.o \ - iova_bitmap.o \ - container.o + iova_bitmap.o vfio-$(CONFIG_IOMMUFD) += iommufd.o +vfio-$(CONFIG_VFIO_CONTAINER) += container.o obj-$(CONFIG_VFIO_VIRQFD) += vfio_virqfd.o obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index b1ef84249637..ce5fe3fc493b 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -55,7 +55,9 @@ struct vfio_group { struct list_head device_list; struct mutex device_lock; struct list_head vfio_next; +#if IS_ENABLED(CONFIG_VFIO_CONTAINER) struct list_head container_next; +#endif enum vfio_group_type type; struct mutex group_lock; struct kvm *kvm; @@ -64,6 +66,7 @@ struct vfio_group { struct iommufd_ctx *iommufd; }; +#if IS_ENABLED(CONFIG_VFIO_CONTAINER) /* events for the backend driver notify callback */ enum vfio_iommu_notify_type { VFIO_IOMMU_CONTAINER_CLOSE = 0, @@ -129,6 +132,68 @@ int vfio_container_dma_rw(struct vfio_container *container, dma_addr_t iova, int __init vfio_container_init(void); void vfio_container_cleanup(void); +#else +static inline struct vfio_container * +vfio_container_from_file(struct file *filep) +{ + return NULL; +} + +static inline int vfio_group_use_container(struct vfio_group *group) +{ + return -EOPNOTSUPP; +} + +static inline void vfio_group_unuse_container(struct vfio_group *group) +{ +} + +static inline int vfio_container_attach_group(struct vfio_container *container, + struct vfio_group *group) +{ + return -EOPNOTSUPP; +} + +static inline void vfio_group_detach_container(struct vfio_group *group) +{ +} + +static inline void vfio_device_container_register(struct vfio_device *device) +{ +} + +static inline void vfio_device_container_unregister(struct vfio_device *device) +{ +} + +static inline int vfio_container_pin_pages(struct vfio_container *container, + struct iommu_group *iommu_group, + dma_addr_t iova, int npage, int prot, + struct page **pages) +{ + return -EOPNOTSUPP; +} + +static inline void vfio_container_unpin_pages(struct vfio_container *container, + dma_addr_t iova, int npage) +{ +} + +static inline int vfio_container_dma_rw(struct vfio_container *container, + dma_addr_t iova, void *data, size_t len, + bool write) +{ + return -EOPNOTSUPP; +} + +static inline int vfio_container_init(void) +{ + return 0; +} +static inline void vfio_container_cleanup(void) +{ +} +#endif #if IS_ENABLED(CONFIG_IOMMUFD) int vfio_iommufd_bind(struct vfio_device *device, struct iommufd_ctx *ictx); |