asm-generic/hyperv: introduce hv_device_id and auxiliary structures

We will need to identify the device we want Microsoft Hypervisor to
manipulate.  Introduce the data structures for that purpose.

They will be used in a later patch.

Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-14-wei.liu@kernel.org

diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 723f487..20457a8 100644 (file)
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -624,4 +624,83 @@ struct hv_set_vp_registers_input {
        } element[];
 } __packed;
 
+enum hv_device_type {
+       HV_DEVICE_TYPE_LOGICAL = 0,
+       HV_DEVICE_TYPE_PCI = 1,
+       HV_DEVICE_TYPE_IOAPIC = 2,
+       HV_DEVICE_TYPE_ACPI = 3,
+};
+
+typedef u16 hv_pci_rid;
+typedef u16 hv_pci_segment;
+typedef u64 hv_logical_device_id;
+union hv_pci_bdf {
+       u16 as_uint16;
+
+       struct {
+               u8 function:3;
+               u8 device:5;
+               u8 bus;
+       };
+} __packed;
+
+union hv_pci_bus_range {
+       u16 as_uint16;
+
+       struct {
+               u8 subordinate_bus;
+               u8 secondary_bus;
+       };
+} __packed;
+
+union hv_device_id {
+       u64 as_uint64;
+
+       struct {
+               u64 reserved0:62;
+               u64 device_type:2;
+       };
+
+       /* HV_DEVICE_TYPE_LOGICAL */
+       struct {
+               u64 id:62;
+               u64 device_type:2;
+       } logical;
+
+       /* HV_DEVICE_TYPE_PCI */
+       struct {
+               union {
+                       hv_pci_rid rid;
+                       union hv_pci_bdf bdf;
+               };
+
+               hv_pci_segment segment;
+               union hv_pci_bus_range shadow_bus_range;
+
+               u16 phantom_function_bits:2;
+               u16 source_shadow:1;
+
+               u16 rsvdz0:11;
+               u16 device_type:2;
+       } pci;
+
+       /* HV_DEVICE_TYPE_IOAPIC */
+       struct {
+               u8 ioapic_id;
+               u8 rsvdz0;
+               u16 rsvdz1;
+               u16 rsvdz2;
+
+               u16 rsvdz3:14;
+               u16 device_type:2;
+       } ioapic;
+
+       /* HV_DEVICE_TYPE_ACPI */
+       struct {
+               u32 input_mapping_base;
+               u32 input_mapping_count:30;
+               u32 device_type:2;
+       } acpi;
+} __packed;
+
 #endif