diff options
| -rw-r--r-- | drivers/iommu/iommu.c | 20 | ||||
| -rw-r--r-- | include/linux/iommu.h | 22 | ||||
| -rw-r--r-- | include/uapi/linux/iommu.h | 59 |
3 files changed, 101 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6ca9d28c08bb..4486c4e6830a 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1675,6 +1675,26 @@ int iommu_cache_invalidate(struct iommu_domain *domain, struct device *dev, } EXPORT_SYMBOL_GPL(iommu_cache_invalidate); +int iommu_sva_bind_gpasid(struct iommu_domain *domain, + struct device *dev, struct iommu_gpasid_bind_data *data) +{ + if (unlikely(!domain->ops->sva_bind_gpasid)) + return -ENODEV; + + return domain->ops->sva_bind_gpasid(domain, dev, data); +} +EXPORT_SYMBOL_GPL(iommu_sva_bind_gpasid); + +int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct device *dev, + ioasid_t pasid) +{ + if (unlikely(!domain->ops->sva_unbind_gpasid)) + return -ENODEV; + + return domain->ops->sva_unbind_gpasid(dev, pasid); +} +EXPORT_SYMBOL_GPL(iommu_sva_unbind_gpasid); + static void __iommu_detach_device(struct iommu_domain *domain, struct device *dev) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9b22055e6f85..f8959f759e41 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -13,6 +13,7 @@ #include <linux/errno.h> #include <linux/err.h> #include <linux/of.h> +#include <linux/ioasid.h> #include <uapi/linux/iommu.h> #define IOMMU_READ (1 << 0) @@ -246,6 +247,8 @@ struct iommu_iotlb_gather { * @page_response: handle page request response * @cache_invalidate: invalidate translation caches * @pgsize_bitmap: bitmap of all possible supported page sizes + * @sva_bind_gpasid: bind guest pasid and mm + * @sva_unbind_gpasid: unbind guest pasid and mm */ struct iommu_ops { bool (*capable)(enum iommu_cap); @@ -309,6 +312,10 @@ struct iommu_ops { struct iommu_page_response *msg); int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev, struct iommu_cache_invalidate_info *inv_info); + int (*sva_bind_gpasid)(struct iommu_domain *domain, + struct device *dev, struct iommu_gpasid_bind_data *data); + + int (*sva_unbind_gpasid)(struct device *dev, int pasid); unsigned long pgsize_bitmap; }; @@ -423,6 +430,10 @@ extern void iommu_detach_device(struct iommu_domain *domain, extern int iommu_cache_invalidate(struct iommu_domain *domain, struct device *dev, struct iommu_cache_invalidate_info *inv_info); +extern int iommu_sva_bind_gpasid(struct iommu_domain *domain, + struct device *dev, struct iommu_gpasid_bind_data *data); +extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid); extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); extern struct iommu_domain *iommu_get_dma_domain(struct device *dev); extern int iommu_map(struct iommu_domain *domain, unsigned long iova, @@ -1018,6 +1029,17 @@ iommu_cache_invalidate(struct iommu_domain *domain, { return -ENODEV; } +static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain, + struct device *dev, struct iommu_gpasid_bind_data *data) +{ + return -ENODEV; +} + +static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain, + struct device *dev, int pasid) +{ + return -ENODEV; +} #endif /* CONFIG_IOMMU_API */ diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h index f3e96214df8e..4ad3496e5c43 100644 --- a/include/uapi/linux/iommu.h +++ b/include/uapi/linux/iommu.h @@ -262,4 +262,63 @@ struct iommu_cache_invalidate_info { }; }; +/** + * struct iommu_gpasid_bind_data_vtd - Intel VT-d specific data on device and guest + * SVA binding. + * + * @flags: VT-d PASID table entry attributes + * @pat: Page attribute table data to compute effective memory type + * @emt: Extended memory type + * + * Only guest vIOMMU selectable and effective options are passed down to + * the host IOMMU. + */ +struct iommu_gpasid_bind_data_vtd { +#define IOMMU_SVA_VTD_GPASID_SRE (1 << 0) /* supervisor request */ +#define IOMMU_SVA_VTD_GPASID_EAFE (1 << 1) /* extended access enable */ +#define IOMMU_SVA_VTD_GPASID_PCD (1 << 2) /* page-level cache disable */ +#define IOMMU_SVA_VTD_GPASID_PWT (1 << 3) /* page-level write through */ +#define IOMMU_SVA_VTD_GPASID_EMTE (1 << 4) /* extended mem type enable */ +#define IOMMU_SVA_VTD_GPASID_CD (1 << 5) /* PASID-level cache disable */ + __u64 flags; + __u32 pat; + __u32 emt; +}; + +/** + * struct iommu_gpasid_bind_data - Information about device and guest PASID binding + * @version: Version of this data structure + * @format: PASID table entry format + * @flags: Additional information on guest bind request + * @gpgd: Guest page directory base of the guest mm to bind + * @hpasid: Process address space ID used for the guest mm in host IOMMU + * @gpasid: Process address space ID used for the guest mm in guest IOMMU + * @addr_width: Guest virtual address width + * @padding: Reserved for future use (should be zero) + * @vtd: Intel VT-d specific data + * + * Guest to host PASID mapping can be an identity or non-identity, where guest + * has its own PASID space. For non-identify mapping, guest to host PASID lookup + * is needed when VM programs guest PASID into an assigned device. VMM may + * trap such PASID programming then request host IOMMU driver to convert guest + * PASID to host PASID based on this bind data. + */ +struct iommu_gpasid_bind_data { +#define IOMMU_GPASID_BIND_VERSION_1 1 + __u32 version; +#define IOMMU_PASID_FORMAT_INTEL_VTD 1 + __u32 format; +#define IOMMU_SVA_GPASID_VAL (1 << 0) /* guest PASID valid */ + __u64 flags; + __u64 gpgd; + __u64 hpasid; + __u64 gpasid; + __u32 addr_width; + __u8 padding[12]; + /* Vendor specific data */ + union { + struct iommu_gpasid_bind_data_vtd vtd; + }; +}; + #endif /* _UAPI_IOMMU_H */ |