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/shared/tdx.h>
12
13 /*
14 * SW-defined error codes.
15 *
16 * Bits 47:40 == 0xFF indicate Reserved status code class that never used by
17 * TDX module.
18 */
19 #define TDX_ERROR _BITUL(63)
20 #define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
21 #define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
22
23 #ifndef __ASSEMBLY__
24
25 /*
26 * Used by the #VE exception handler to gather the #VE exception
27 * info from the TDX module. This is a software only structure
28 * and not part of the TDX module/VMM ABI.
29 */
30 struct ve_info {
31 u64 exit_reason;
32 u64 exit_qual;
33 /* Guest Linear (virtual) Address */
34 u64 gla;
35 /* Guest Physical Address */
36 u64 gpa;
37 u32 instr_len;
38 u32 instr_info;
39 };
40
41 #ifdef CONFIG_INTEL_TDX_GUEST
42
43 void __init tdx_early_init(void);
44
45 void tdx_get_ve_info(struct ve_info *ve);
46
47 bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
48
49 void tdx_safe_halt(void);
50
51 bool tdx_early_handle_ve(struct pt_regs *regs);
52
53 int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport);
54
55 #else
56
tdx_early_init(void)57 static inline void tdx_early_init(void) { };
tdx_safe_halt(void)58 static inline void tdx_safe_halt(void) { };
59
tdx_early_handle_ve(struct pt_regs * regs)60 static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; }
61
62 #endif /* CONFIG_INTEL_TDX_GUEST */
63
64 #if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST)
65 long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2,
66 unsigned long p3, unsigned long p4);
67 #else
tdx_kvm_hypercall(unsigned int nr,unsigned long p1,unsigned long p2,unsigned long p3,unsigned long p4)68 static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1,
69 unsigned long p2, unsigned long p3,
70 unsigned long p4)
71 {
72 return -ENODEV;
73 }
74 #endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */
75 #endif /* !__ASSEMBLY__ */
76 #endif /* _ASM_X86_TDX_H */
77