From: Wei Liu <[email protected]> Hyper-V guest IOMMU is a para-virtualized IOMMU based on hypercalls. Introduce the hypercalls used by the child partition to interact with this facility.
These hypercalls fall into below categories: - Detection and capability: HVCALL_GET_IOMMU_CAPABILITIES is used to detect the existence and capabilities of the guest IOMMU. - Device management: HVCALL_GET_LOGICAL_DEVICE_PROPERTY is used to check whether an endpoint device is managed by the guest IOMMU. - Domain management: A set of hypercalls is provided to handle the creation, configuration, and deletion of guest domains, as well as the attachment/detachment of endpoint devices to/from those domains. - IOTLB flushing: HVCALL_FLUSH_DEVICE_DOMAIN is used to ask Hyper-V for a domain-selective IOTLB flush(which in its handler may flush the device TLB as well). Page-selective IOTLB flushes will be offered by new hypercalls in future patches. Signed-off-by: Wei Liu <[email protected]> Co-developed-by: Jacob Pan <[email protected]> Signed-off-by: Jacob Pan <[email protected]> Co-developed-by: Easwar Hariharan <[email protected]> Signed-off-by: Easwar Hariharan <[email protected]> Co-developed-by: Yu Zhang <[email protected]> Signed-off-by: Yu Zhang <[email protected]> --- include/hyperv/hvgdk_mini.h | 8 +++ include/hyperv/hvhdk_mini.h | 123 ++++++++++++++++++++++++++++++++++++ 2 files changed, 131 insertions(+) diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h index 77abddfc750e..e5b302bbfe14 100644 --- a/include/hyperv/hvgdk_mini.h +++ b/include/hyperv/hvgdk_mini.h @@ -478,10 +478,16 @@ union hv_vp_assist_msr_contents { /* HV_REGISTER_VP_ASSIST_PAGE */ #define HVCALL_GET_VP_INDEX_FROM_APIC_ID 0x009a #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0 +#define HVCALL_CREATE_DEVICE_DOMAIN 0x00b1 +#define HVCALL_ATTACH_DEVICE_DOMAIN 0x00b2 #define HVCALL_SIGNAL_EVENT_DIRECT 0x00c0 #define HVCALL_POST_MESSAGE_DIRECT 0x00c1 #define HVCALL_DISPATCH_VP 0x00c2 +#define HVCALL_DETACH_DEVICE_DOMAIN 0x00c4 +#define HVCALL_DELETE_DEVICE_DOMAIN 0x00c5 #define HVCALL_GET_GPA_PAGES_ACCESS_STATES 0x00c9 +#define HVCALL_CONFIGURE_DEVICE_DOMAIN 0x00ce +#define HVCALL_FLUSH_DEVICE_DOMAIN 0x00d0 #define HVCALL_ACQUIRE_SPARSE_SPA_PAGE_HOST_ACCESS 0x00d7 #define HVCALL_RELEASE_SPARSE_SPA_PAGE_HOST_ACCESS 0x00d8 #define HVCALL_MODIFY_SPARSE_GPA_PAGE_HOST_VISIBILITY 0x00db @@ -492,6 +498,8 @@ union hv_vp_assist_msr_contents { /* HV_REGISTER_VP_ASSIST_PAGE */ #define HVCALL_GET_VP_CPUID_VALUES 0x00f4 #define HVCALL_MMIO_READ 0x0106 #define HVCALL_MMIO_WRITE 0x0107 +#define HVCALL_GET_IOMMU_CAPABILITIES 0x0125 +#define HVCALL_GET_LOGICAL_DEVICE_PROPERTY 0x0127 /* HV_HYPERCALL_INPUT */ #define HV_HYPERCALL_RESULT_MASK GENMASK_ULL(15, 0) diff --git a/include/hyperv/hvhdk_mini.h b/include/hyperv/hvhdk_mini.h index 858f6a3925b3..ba6b91746b13 100644 --- a/include/hyperv/hvhdk_mini.h +++ b/include/hyperv/hvhdk_mini.h @@ -400,4 +400,127 @@ union hv_device_id { /* HV_DEVICE_ID */ } acpi; } __packed; +/* Device domain types */ +#define HV_DEVICE_DOMAIN_TYPE_S1 1 /* Stage 1 domain */ + +/* ID for default domain and NULL domain */ +#define HV_DEVICE_DOMAIN_ID_DEFAULT 0 +#define HV_DEVICE_DOMAIN_ID_NULL 0xFFFFFFFFULL + +union hv_device_domain_id { + u64 as_uint64; + struct { + u32 type: 4; + u32 reserved: 28; + u32 id; + } __packed; +}; + +struct hv_input_device_domain { + u64 partition_id; + union hv_input_vtl owner_vtl; + u8 padding[7]; + union hv_device_domain_id domain_id; +} __packed; + +union hv_create_device_domain_flags { + u32 as_uint32; + struct { + u32 forward_progress_required: 1; + u32 inherit_owning_vtl: 1; + u32 reserved: 30; + } __packed; +}; + +struct hv_input_create_device_domain { + struct hv_input_device_domain device_domain; + union hv_create_device_domain_flags create_device_domain_flags; +} __packed; + +struct hv_input_delete_device_domain { + struct hv_input_device_domain device_domain; +} __packed; + +struct hv_input_attach_device_domain { + struct hv_input_device_domain device_domain; + union hv_device_id device_id; +} __packed; + +struct hv_input_detach_device_domain { + u64 partition_id; + union hv_device_id device_id; +} __packed; + +struct hv_device_domain_settings { + struct { + /* + * Enable translations. If not enabled, all transaction bypass + * S1 translations. + */ + u64 translation_enabled: 1; + u64 blocked: 1; + /* + * First stage address translation paging mode: + * 0: 4-level paging (default) + * 1: 5-level paging + */ + u64 first_stage_paging_mode: 1; + u64 reserved: 61; + } flags; + + /* Address of translation table */ + u64 page_table_root; +} __packed; + +struct hv_input_configure_device_domain { + struct hv_input_device_domain device_domain; + struct hv_device_domain_settings settings; +} __packed; + +struct hv_input_get_iommu_capabilities { + u64 partition_id; + u64 reserved; +} __packed; + +struct hv_output_get_iommu_capabilities { + u32 size; + u16 reserved; + u8 max_iova_width; + u8 max_pasid_width; + +#define HV_IOMMU_CAP_PRESENT (1ULL << 0) +#define HV_IOMMU_CAP_S2 (1ULL << 1) +#define HV_IOMMU_CAP_S1 (1ULL << 2) +#define HV_IOMMU_CAP_S1_5LVL (1ULL << 3) +#define HV_IOMMU_CAP_PASID (1ULL << 4) +#define HV_IOMMU_CAP_ATS (1ULL << 5) +#define HV_IOMMU_CAP_PRI (1ULL << 6) + + u64 iommu_cap; + u64 pgsize_bitmap; +} __packed; + +enum hv_logical_device_property_code { + HV_LOGICAL_DEVICE_PROPERTY_PVIOMMU = 10, +}; + +struct hv_input_get_logical_device_property { + u64 partition_id; + u64 logical_device_id; + enum hv_logical_device_property_code code; + u32 reserved; +} __packed; + +struct hv_output_get_logical_device_property { +#define HV_DEVICE_IOMMU_ENABLED (1ULL << 0) + u64 device_iommu; + u64 reserved; +} __packed; + +struct hv_input_flush_device_domain { + struct hv_input_device_domain device_domain; + u32 flags; + u32 reserved; +} __packed; + #endif /* _HV_HVHDK_MINI_H */ -- 2.49.0
