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Subject[PATCH RFC v1 13/18] asm-generic/hyperv: introduce hv_device_id and auxiliary structures
Date
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>
---
include/asm-generic/hyperv-tlfs.h | 79 +++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)

diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 83945ada5a50..faf892ce152d 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -612,4 +612,83 @@ 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 :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
--
2.20.1
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