[PATCH V1 2/3] mshv: Import data structs around device domains from hyperv headers
From: Mukesh R
Date: Wed Sep 23 2026 - 22:04:20 EST
Copy/import from Hyper-V public headers, definitions and declarations that
are related to creating iommu domains in the hypervisor, attaching devices
to them, doing the reverse, etc.
Signed-off-by: Mukesh R <mrathor@xxxxxxxxxxxxxxxxxxx>
---
include/hyperv/hvgdk_mini.h | 9 ++++
include/hyperv/hvhdk_mini.h | 87 +++++++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+)
diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index 6a4e8b9d570f..3b74f3c0229d 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -326,6 +326,8 @@ union hv_hypervisor_version_info {
/* stimer Direct Mode is available */
#define HV_STIMER_DIRECT_MODE_AVAILABLE BIT(19)
+#define HV_DEVICE_DOMAIN_AVAILABLE BIT(24)
+
/*
* Implementation recommendations. Indicates which behaviors the hypervisor
* recommends the OS implement for optimal performance.
@@ -486,9 +488,15 @@ 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_MAP_DEVICE_GPA_PAGES 0x00b3
+#define HVCALL_UNMAP_DEVICE_GPA_PAGES 0x00b4
#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_ACQUIRE_SPARSE_SPA_PAGE_HOST_ACCESS 0x00d7
#define HVCALL_RELEASE_SPARSE_SPA_PAGE_HOST_ACCESS 0x00d8
@@ -502,6 +510,7 @@ union hv_vp_assist_msr_contents { /* HV_REGISTER_VP_ASSIST_PAGE */
#define HVCALL_MMIO_READ 0x0106
#define HVCALL_MMIO_WRITE 0x0107
#define HVCALL_DISABLE_HYP_EX 0x010f
+#define HVCALL_GET_IOMMU_CAPABILITIES 0x0125
#define HVCALL_MAP_STATS_PAGE2 0x0131
/* HV_HYPERCALL_INPUT */
diff --git a/include/hyperv/hvhdk_mini.h b/include/hyperv/hvhdk_mini.h
index 035ba20870f7..3dbfb338bcba 100644
--- a/include/hyperv/hvhdk_mini.h
+++ b/include/hyperv/hvhdk_mini.h
@@ -548,4 +548,91 @@ union hv_device_id { /* HV_DEVICE_ID */
} acpi;
} __packed;
+#define HV_DEVICE_DOMAIN_TYPE_S2 0 /* HV_DEVICE_DOMAIN_ID_TYPE_S2 */
+#define HV_DEVICE_DOMAIN_TYPE_S1 1 /* HV_DEVICE_DOMAIN_ID_TYPE_S1 */
+
+#define HV_DEVICE_DOMAIN_ID_S2_DEFAULT 0
+#define HV_DEVICE_DOMAIN_ID_S2_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 { /* 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 { /* HV_CREATE_DEVICE_DOMAIN_FLAGS */
+ u32 as_uint32;
+ struct {
+ u32 forward_progress_required : 1;
+ u32 inherit_owning_vtl : 1;
+ u32 reserved : 30;
+ } __packed;
+} __packed;
+
+struct hv_input_create_device_domain { /* 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 { /* HV_INPUT_DELETE_DEVICE_DOMAIN */
+ struct hv_input_device_domain device_domain;
+} __packed;
+
+struct hv_input_attach_device_domain { /* 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 { /* HV_INPUT_DETACH_DEVICE_DOMAIN */
+ u64 partition_id;
+ union hv_device_id device_id;
+} __packed;
+
+/* HV_INPUT_GET_IOMMU_CAPABILITIES */
+struct hv_input_get_iommu_capabilities {
+ u64 partition_id;
+ u64 reserved;
+} __packed;
+
+#define HV_IOMMU_CAP_PRESENT BIT_ULL(0)
+#define HV_IOMMU_CAP_S2 BIT_ULL(1)
+#define HV_IOMMU_CAP_S1 BIT_ULL(2)
+#define HV_IOMMU_CAP_S1_5LVL BIT_ULL(3)
+#define HV_IOMMU_CAP_PASID BIT_ULL(4)
+#define HV_IOMMU_CAP_ATS BIT_ULL(5)
+#define HV_IOMMU_CAP_PRI BIT_ULL(6)
+
+struct hv_output_get_iommu_capabilities { /* HV_OUTPUT_GET_IOMMU_CAPABILITIES */
+ u32 size;
+ u16 reserved;
+ u8 max_iova_width;
+ u8 max_pasid_width;
+ u64 iommu_cap; /* HV_IOMMU_CAP_* above */
+ u64 pgsize_bitmap;
+} __packed;
+
+struct hv_input_map_device_gpa_pages { /* HV_INPUT_MAP_DEVICE_GPA_PAGES */
+ struct hv_input_device_domain device_domain;
+ union hv_input_vtl target_vtl;
+ u8 padding[3];
+ u32 map_flags;
+ u64 target_device_va_base;
+ u64 gpa_page_list[];
+} __packed;
+
+struct hv_input_unmap_device_gpa_pages { /* HV_INPUT_UNMAP_DEVICE_GPA_PAGES */
+ struct hv_input_device_domain device_domain;
+ u64 target_device_va_base;
+} __packed;
+
#endif /* _HV_HVHDK_MINI_H */
--
2.51.2.vfs.0.1