1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_SHARED_TDX_H
#define _ASM_X86_SHARED_TDX_H
#include <linux/bits.h>
#include <linux/types.h>
#define TDX_HYPERCALL_STANDARD 0
#define TDX_CPUID_LEAF_ID 0x21
#define TDX_IDENT "IntelTDX "
/* TDX module Call Leaf IDs */
#define TDG_VP_VMCALL 0
#define TDG_VP_INFO 1
#define TDG_VP_VEINFO_GET 3
#define TDG_MR_REPORT 4
#define TDG_MEM_PAGE_ACCEPT 6
#define TDG_VM_RD 7
#define TDG_VM_WR 8
/* TDX attributes */
#define TDX_ATTR_DEBUG_BIT 0
#define TDX_ATTR_DEBUG BIT_ULL(TDX_ATTR_DEBUG_BIT)
#define TDX_ATTR_HGS_PLUS_PROF_BIT 4
#define TDX_ATTR_HGS_PLUS_PROF BIT_ULL(TDX_ATTR_HGS_PLUS_PROF_BIT)
#define TDX_ATTR_PERF_PROF_BIT 5
#define TDX_ATTR_PERF_PROF BIT_ULL(TDX_ATTR_PERF_PROF_BIT)
#define TDX_ATTR_PMT_PROF_BIT 6
#define TDX_ATTR_PMT_PROF BIT_ULL(TDX_ATTR_PMT_PROF_BIT)
#define TDX_ATTR_ICSSD_BIT 16
#define TDX_ATTR_ICSSD BIT_ULL(TDX_ATTR_ICSSD_BIT)
#define TDX_ATTR_LASS_BIT 27
#define TDX_ATTR_LASS BIT_ULL(TDX_ATTR_LASS_BIT)
#define TDX_ATTR_SEPT_VE_DISABLE_BIT 28
#define TDX_ATTR_SEPT_VE_DISABLE BIT_ULL(TDX_ATTR_SEPT_VE_DISABLE_BIT)
#define TDX_ATTR_MIGRTABLE_BIT 29
#define TDX_ATTR_MIGRTABLE BIT_ULL(TDX_ATTR_MIGRTABLE_BIT)
#define TDX_ATTR_PKS_BIT 30
#define TDX_ATTR_PKS BIT_ULL(TDX_ATTR_PKS_BIT)
#define TDX_ATTR_KL_BIT 31
#define TDX_ATTR_KL BIT_ULL(TDX_ATTR_KL_BIT)
#define TDX_ATTR_TPA_BIT 62
#define TDX_ATTR_TPA BIT_ULL(TDX_ATTR_TPA_BIT)
#define TDX_ATTR_PERFMON_BIT 63
#define TDX_ATTR_PERFMON BIT_ULL(TDX_ATTR_PERFMON_BIT)
/* TDX TD-Scope Metadata. To be used by TDG.VM.WR and TDG.VM.RD */
#define TDCS_CONFIG_FLAGS 0x1110000300000016
#define TDCS_TD_CTLS 0x1110000300000017
#define TDCS_NOTIFY_ENABLES 0x9100000000000010
#define TDCS_TOPOLOGY_ENUM_CONFIGURED 0x9100000000000019
/* TDCS_CONFIG_FLAGS bits */
#define TDCS_CONFIG_FLEXIBLE_PENDING_VE BIT_ULL(1)
/* TDCS_TD_CTLS bits */
#define TD_CTLS_PENDING_VE_DISABLE_BIT 0
#define TD_CTLS_PENDING_VE_DISABLE BIT_ULL(TD_CTLS_PENDING_VE_DISABLE_BIT)
#define TD_CTLS_ENUM_TOPOLOGY_BIT 1
#define TD_CTLS_ENUM_TOPOLOGY BIT_ULL(TD_CTLS_ENUM_TOPOLOGY_BIT)
#define TD_CTLS_VIRT_CPUID2_BIT 2
#define TD_CTLS_VIRT_CPUID2 BIT_ULL(TD_CTLS_VIRT_CPUID2_BIT)
#define TD_CTLS_REDUCE_VE_BIT 3
#define TD_CTLS_REDUCE_VE BIT_ULL(TD_CTLS_REDUCE_VE_BIT)
#define TD_CTLS_LOCK_BIT 63
#define TD_CTLS_LOCK BIT_ULL(TD_CTLS_LOCK_BIT)
/* TDX hypercall Leaf IDs */
#define TDVMCALL_MAP_GPA 0x10001
#define TDVMCALL_GET_QUOTE 0x10002
#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
#define TDVMCALL_STATUS_RETRY 1
/*
* Bitmasks of exposed registers (with VMM).
*/
#define TDX_RDX BIT(2)
#define TDX_RBX BIT(3)
#define TDX_RSI BIT(6)
#define TDX_RDI BIT(7)
#define TDX_R8 BIT(8)
#define TDX_R9 BIT(9)
#define TDX_R10 BIT(10)
#define TDX_R11 BIT(11)
#define TDX_R12 BIT(12)
#define TDX_R13 BIT(13)
#define TDX_R14 BIT(14)
#define TDX_R15 BIT(15)
/*
* These registers are clobbered to hold arguments for each
* TDVMCALL. They are safe to expose to the VMM.
* Each bit in this mask represents a register ID. Bit field
* details can be found in TDX GHCI specification, section
* titled "TDCALL [TDG.VP.VMCALL] leaf".
*/
#define TDVMCALL_EXPOSE_REGS_MASK \
(TDX_RDX | TDX_RBX | TDX_RSI | TDX_RDI | TDX_R8 | TDX_R9 | \
TDX_R10 | TDX_R11 | TDX_R12 | TDX_R13 | TDX_R14 | TDX_R15)
/* TDX supported page sizes from the TDX module ABI. */
#define TDX_PS_4K 0
#define TDX_PS_2M 1
#define TDX_PS_1G 2
#define TDX_PS_NR (TDX_PS_1G + 1)
#ifndef __ASSEMBLER__
#include <linux/compiler_attributes.h>
/*
* Used in __tdcall*() to gather the input/output registers' values of the
* TDCALL instruction when requesting services from the TDX module. This is a
* software only structure and not part of the TDX module/VMM ABI
*/
struct tdx_module_args {
/* callee-clobbered */
u64 rcx;
u64 rdx;
u64 r8;
u64 r9;
/* extra callee-clobbered */
u64 r10;
u64 r11;
/* callee-saved + rdi/rsi */
u64 r12;
u64 r13;
u64 r14;
u64 r15;
u64 rbx;
u64 rdi;
u64 rsi;
};
/* Used to communicate with the TDX module */
u64 __tdcall(u64 fn, struct tdx_module_args *args);
u64 __tdcall_ret(u64 fn, struct tdx_module_args *args);
u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args);
/* Used to request services from the VMM */
u64 __tdx_hypercall(struct tdx_module_args *args);
/*
* Wrapper for standard use of __tdx_hypercall with no output aside from
* return code.
*/
static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
{
struct tdx_module_args args = {
.r10 = TDX_HYPERCALL_STANDARD,
.r11 = fn,
.r12 = r12,
.r13 = r13,
.r14 = r14,
.r15 = r15,
};
return __tdx_hypercall(&args);
}
/* Called from __tdx_hypercall() for unrecoverable failure */
void __noreturn __tdx_hypercall_failed(void);
bool tdx_accept_memory(phys_addr_t start, phys_addr_t end);
/*
* The TDG.VP.VMCALL-Instruction-execution sub-functions are defined
* independently from but are currently matched 1:1 with VMX EXIT_REASONs.
* Reusing the KVM EXIT_REASON macros makes it easier to connect the host and
* guest sides of these calls.
*/
static __always_inline u64 hcall_func(u64 exit_reason)
{
return exit_reason;
}
#endif /* !__ASSEMBLER__ */
#endif /* _ASM_X86_SHARED_TDX_H */
|
