Commit 12434e5f authored by Wei Liu's avatar Wei Liu
Browse files

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: default avatarSunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: default avatarSunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
Reviewed-by: default avatarMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-14-wei.liu@kernel.org
parent b59fb7b6

include/asm-generic/hyperv-tlfs.h

+79 −0
Original line number Diff line number Diff line
@@ -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