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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) 2021-2022 Intel Corporation */
3#ifndef _ASM_X86_TDX_H
4#define _ASM_X86_TDX_H
5
6#include <linux/init.h>
7#include <linux/bits.h>
8
9#include <asm/errno.h>
10#include <asm/ptrace.h>
11#include <asm/trapnr.h>
12#include <asm/shared/tdx.h>
13
14/*
15 * SW-defined error codes.
16 *
17 * Bits 47:40 == 0xFF indicate Reserved status code class that never used by
18 * TDX module.
19 */
20#define TDX_ERROR _BITUL(63)
21#define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
22#define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
23
24#define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP)
25#define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD)
26
27#ifndef __ASSEMBLY__
28
29/*
30 * Used by the #VE exception handler to gather the #VE exception
31 * info from the TDX module. This is a software only structure
32 * and not part of the TDX module/VMM ABI.
33 */
34struct ve_info {
35 u64 exit_reason;
36 u64 exit_qual;
37 /* Guest Linear (virtual) Address */
38 u64 gla;
39 /* Guest Physical Address */
40 u64 gpa;
41 u32 instr_len;
42 u32 instr_info;
43};
44
45#ifdef CONFIG_INTEL_TDX_GUEST
46
47void __init tdx_early_init(void);
48
49void tdx_get_ve_info(struct ve_info *ve);
50
51bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
52
53void tdx_safe_halt(void);
54
55bool tdx_early_handle_ve(struct pt_regs *regs);
56
57int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport);
58
59u64 tdx_hcall_get_quote(u8 *buf, size_t size);
60
61#else
62
63static inline void tdx_early_init(void) { };
64static inline void tdx_safe_halt(void) { };
65
66static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; }
67
68#endif /* CONFIG_INTEL_TDX_GUEST */
69
70#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST)
71long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2,
72 unsigned long p3, unsigned long p4);
73#else
74static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1,
75 unsigned long p2, unsigned long p3,
76 unsigned long p4)
77{
78 return -ENODEV;
79}
80#endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */
81
82#ifdef CONFIG_INTEL_TDX_HOST
83u64 __seamcall(u64 fn, struct tdx_module_args *args);
84u64 __seamcall_ret(u64 fn, struct tdx_module_args *args);
85u64 __seamcall_saved_ret(u64 fn, struct tdx_module_args *args);
86#endif /* CONFIG_INTEL_TDX_HOST */
87
88#endif /* !__ASSEMBLY__ */
89#endif /* _ASM_X86_TDX_H */