1 | /* SPDX-License-Identifier: MIT */ |
2 | /* |
3 | * ioreq.h: I/O request definitions for device models |
4 | * Copyright (c) 2004, Intel Corporation. |
5 | */ |
6 | |
7 | #ifndef __XEN_PUBLIC_HVM_IOREQ_H__ |
8 | #define __XEN_PUBLIC_HVM_IOREQ_H__ |
9 | |
10 | #define IOREQ_READ 1 |
11 | #define IOREQ_WRITE 0 |
12 | |
13 | #define STATE_IOREQ_NONE 0 |
14 | #define STATE_IOREQ_READY 1 |
15 | #define STATE_IOREQ_INPROCESS 2 |
16 | #define STATE_IORESP_READY 3 |
17 | |
18 | #define IOREQ_TYPE_PIO 0 /* pio */ |
19 | #define IOREQ_TYPE_COPY 1 /* mmio ops */ |
20 | #define IOREQ_TYPE_PCI_CONFIG 2 |
21 | #define IOREQ_TYPE_TIMEOFFSET 7 |
22 | #define IOREQ_TYPE_INVALIDATE 8 /* mapcache */ |
23 | |
24 | /* |
25 | * VMExit dispatcher should cooperate with instruction decoder to |
26 | * prepare this structure and notify service OS and DM by sending |
27 | * virq. |
28 | * |
29 | * For I/O type IOREQ_TYPE_PCI_CONFIG, the physical address is formatted |
30 | * as follows: |
31 | * |
32 | * 63....48|47..40|39..35|34..32|31........0 |
33 | * SEGMENT |BUS |DEV |FN |OFFSET |
34 | */ |
35 | struct ioreq { |
36 | uint64_t addr; /* physical address */ |
37 | uint64_t data; /* data (or paddr of data) */ |
38 | uint32_t count; /* for rep prefixes */ |
39 | uint32_t size; /* size in bytes */ |
40 | uint32_t vp_eport; /* evtchn for notifications to/from device model */ |
41 | uint16_t _pad0; |
42 | uint8_t state:4; |
43 | uint8_t data_is_ptr:1; /* if 1, data above is the guest paddr |
44 | * of the real data to use. */ |
45 | uint8_t dir:1; /* 1=read, 0=write */ |
46 | uint8_t df:1; |
47 | uint8_t _pad1:1; |
48 | uint8_t type; /* I/O type */ |
49 | }; |
50 | |
51 | #endif /* __XEN_PUBLIC_HVM_IOREQ_H__ */ |
52 | |