1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _X86_VIRT_TDX_H
3#define _X86_VIRT_TDX_H
4
5#include <linux/bits.h>
6
7/*
8 * This file contains both macros and data structures defined by the TDX
9 * architecture and Linux defined software data structures and functions.
10 * The two should not be mixed together for better readability. The
11 * architectural definitions come first.
12 */
13
14/*
15 * TDX module SEAMCALL leaf functions
16 */
17#define TDH_VP_ENTER 0
18#define TDH_MNG_ADDCX 1
19#define TDH_MEM_PAGE_ADD 2
20#define TDH_MEM_SEPT_ADD 3
21#define TDH_VP_ADDCX 4
22#define TDH_MEM_PAGE_AUG 6
23#define TDH_MEM_RANGE_BLOCK 7
24#define TDH_MNG_KEY_CONFIG 8
25#define TDH_MNG_CREATE 9
26#define TDH_MNG_RD 11
27#define TDH_MR_EXTEND 16
28#define TDH_MR_FINALIZE 17
29#define TDH_VP_FLUSH 18
30#define TDH_MNG_VPFLUSHDONE 19
31#define TDH_VP_CREATE 10
32#define TDH_MNG_KEY_FREEID 20
33#define TDH_MNG_INIT 21
34#define TDH_VP_INIT 22
35#define TDH_PHYMEM_PAGE_RDMD 24
36#define TDH_VP_RD 26
37#define TDH_PHYMEM_PAGE_RECLAIM 28
38#define TDH_MEM_PAGE_REMOVE 29
39#define TDH_SYS_KEY_CONFIG 31
40#define TDH_SYS_INIT 33
41#define TDH_SYS_RD 34
42#define TDH_SYS_LP_INIT 35
43#define TDH_SYS_TDMR_INIT 36
44#define TDH_MEM_TRACK 38
45#define TDH_PHYMEM_CACHE_WB 40
46#define TDH_PHYMEM_PAGE_WBINVD 41
47#define TDH_VP_WR 43
48#define TDH_SYS_CONFIG 45
49
50/*
51 * SEAMCALL leaf:
52 *
53 * Bit 15:0 Leaf number
54 * Bit 23:16 Version number
55 */
56#define TDX_VERSION_SHIFT 16
57
58/* TDX page types */
59#define PT_NDA 0x0
60#define PT_RSVD 0x1
61
62struct tdmr_reserved_area {
63 u64 offset;
64 u64 size;
65} __packed;
66
67#define TDMR_INFO_ALIGNMENT 512
68#define TDMR_INFO_PA_ARRAY_ALIGNMENT 512
69
70struct tdmr_info {
71 u64 base;
72 u64 size;
73 u64 pamt_1g_base;
74 u64 pamt_1g_size;
75 u64 pamt_2m_base;
76 u64 pamt_2m_size;
77 u64 pamt_4k_base;
78 u64 pamt_4k_size;
79 /*
80 * The actual number of reserved areas depends on the value of
81 * field MD_FIELD_ID_MAX_RESERVED_PER_TDMR in the TDX module
82 * global metadata.
83 */
84 DECLARE_FLEX_ARRAY(struct tdmr_reserved_area, reserved_areas);
85} __packed __aligned(TDMR_INFO_ALIGNMENT);
86
87/* Bit definitions of TDX_FEATURES0 metadata field */
88#define TDX_FEATURES0_NO_RBP_MOD BIT(18)
89
90/*
91 * Do not put any hardware-defined TDX structure representations below
92 * this comment!
93 */
94
95/* Kernel defined TDX module status during module initialization. */
96enum tdx_module_status_t {
97 TDX_MODULE_UNINITIALIZED,
98 TDX_MODULE_INITIALIZED,
99 TDX_MODULE_ERROR
100};
101
102struct tdx_memblock {
103 struct list_head list;
104 unsigned long start_pfn;
105 unsigned long end_pfn;
106 int nid;
107};
108
109/* Warn if kernel has less than TDMR_NR_WARN TDMRs after allocation */
110#define TDMR_NR_WARN 4
111
112struct tdmr_info_list {
113 void *tdmrs; /* Flexible array to hold 'tdmr_info's */
114 int nr_consumed_tdmrs; /* How many 'tdmr_info's are in use */
115
116 /* Metadata for finding target 'tdmr_info' and freeing @tdmrs */
117 int tdmr_sz; /* Size of one 'tdmr_info' */
118 int max_tdmrs; /* How many 'tdmr_info's are allocated */
119};
120
121#endif
122

source code of linux/arch/x86/virt/vmx/tdx/tdx.h