1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_SHARED_TDX_H 3 #define _ASM_X86_SHARED_TDX_H 4 5 #include <linux/bits.h> 6 #include <linux/types.h> 7 8 #define TDX_HYPERCALL_STANDARD 0 9 10 #define TDX_CPUID_LEAF_ID 0x21 11 #define TDX_IDENT "IntelTDX " 12 13 /* TDX module Call Leaf IDs */ 14 #define TDX_GET_INFO 1 15 #define TDX_GET_VEINFO 3 16 #define TDX_GET_REPORT 4 17 #define TDX_ACCEPT_PAGE 6 18 #define TDX_WR 8 19 20 /* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */ 21 #define TDCS_NOTIFY_ENABLES 0x9100000000000010 22 23 /* TDX hypercall Leaf IDs */ 24 #define TDVMCALL_MAP_GPA 0x10001 25 #define TDVMCALL_REPORT_FATAL_ERROR 0x10003 26 27 #ifndef __ASSEMBLY__ 28 29 /* 30 * Used in __tdx_hypercall() to pass down and get back registers' values of 31 * the TDCALL instruction when requesting services from the VMM. 32 * 33 * This is a software only structure and not part of the TDX module/VMM ABI. 34 */ 35 struct tdx_hypercall_args { 36 u64 r8; 37 u64 r9; 38 u64 r10; 39 u64 r11; 40 u64 r12; 41 u64 r13; 42 u64 r14; 43 u64 r15; 44 u64 rdi; 45 u64 rsi; 46 u64 rbx; 47 u64 rdx; 48 }; 49 50 /* Used to request services from the VMM */ 51 u64 __tdx_hypercall(struct tdx_hypercall_args *args); 52 u64 __tdx_hypercall_ret(struct tdx_hypercall_args *args); 53 54 /* 55 * Wrapper for standard use of __tdx_hypercall with no output aside from 56 * return code. 57 */ 58 static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15) 59 { 60 struct tdx_hypercall_args args = { 61 .r10 = TDX_HYPERCALL_STANDARD, 62 .r11 = fn, 63 .r12 = r12, 64 .r13 = r13, 65 .r14 = r14, 66 .r15 = r15, 67 }; 68 69 return __tdx_hypercall(&args); 70 } 71 72 73 /* Called from __tdx_hypercall() for unrecoverable failure */ 74 void __tdx_hypercall_failed(void); 75 76 /* 77 * Used in __tdx_module_call() to gather the output registers' values of the 78 * TDCALL instruction when requesting services from the TDX module. This is a 79 * software only structure and not part of the TDX module/VMM ABI 80 */ 81 struct tdx_module_output { 82 u64 rcx; 83 u64 rdx; 84 u64 r8; 85 u64 r9; 86 u64 r10; 87 u64 r11; 88 }; 89 90 /* Used to communicate with the TDX module */ 91 u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9, 92 struct tdx_module_output *out); 93 94 bool tdx_accept_memory(phys_addr_t start, phys_addr_t end); 95 96 /* 97 * The TDG.VP.VMCALL-Instruction-execution sub-functions are defined 98 * independently from but are currently matched 1:1 with VMX EXIT_REASONs. 99 * Reusing the KVM EXIT_REASON macros makes it easier to connect the host and 100 * guest sides of these calls. 101 */ 102 static __always_inline u64 hcall_func(u64 exit_reason) 103 { 104 return exit_reason; 105 } 106 107 #endif /* !__ASSEMBLY__ */ 108 #endif /* _ASM_X86_SHARED_TDX_H */ 109