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 TDG_VP_VMCALL 0 15 #define TDG_VP_INFO 1 16 #define TDG_MR_RTMR_EXTEND 2 17 #define TDG_VP_VEINFO_GET 3 18 #define TDG_MR_REPORT 4 19 #define TDG_MEM_PAGE_ACCEPT 6 20 #define TDG_VM_RD 7 21 #define TDG_VM_WR 8 22 23 /* TDX attributes */ 24 #define TDX_ATTR_DEBUG_BIT 0 25 #define TDX_ATTR_DEBUG BIT_ULL(TDX_ATTR_DEBUG_BIT) 26 #define TDX_ATTR_HGS_PLUS_PROF_BIT 4 27 #define TDX_ATTR_HGS_PLUS_PROF BIT_ULL(TDX_ATTR_HGS_PLUS_PROF_BIT) 28 #define TDX_ATTR_PERF_PROF_BIT 5 29 #define TDX_ATTR_PERF_PROF BIT_ULL(TDX_ATTR_PERF_PROF_BIT) 30 #define TDX_ATTR_PMT_PROF_BIT 6 31 #define TDX_ATTR_PMT_PROF BIT_ULL(TDX_ATTR_PMT_PROF_BIT) 32 #define TDX_ATTR_ICSSD_BIT 16 33 #define TDX_ATTR_ICSSD BIT_ULL(TDX_ATTR_ICSSD_BIT) 34 #define TDX_ATTR_LASS_BIT 27 35 #define TDX_ATTR_LASS BIT_ULL(TDX_ATTR_LASS_BIT) 36 #define TDX_ATTR_SEPT_VE_DISABLE_BIT 28 37 #define TDX_ATTR_SEPT_VE_DISABLE BIT_ULL(TDX_ATTR_SEPT_VE_DISABLE_BIT) 38 #define TDX_ATTR_MIGRTABLE_BIT 29 39 #define TDX_ATTR_MIGRTABLE BIT_ULL(TDX_ATTR_MIGRTABLE_BIT) 40 #define TDX_ATTR_PKS_BIT 30 41 #define TDX_ATTR_PKS BIT_ULL(TDX_ATTR_PKS_BIT) 42 #define TDX_ATTR_KL_BIT 31 43 #define TDX_ATTR_KL BIT_ULL(TDX_ATTR_KL_BIT) 44 #define TDX_ATTR_TPA_BIT 62 45 #define TDX_ATTR_TPA BIT_ULL(TDX_ATTR_TPA_BIT) 46 #define TDX_ATTR_PERFMON_BIT 63 47 #define TDX_ATTR_PERFMON BIT_ULL(TDX_ATTR_PERFMON_BIT) 48 49 /* TDX TD-Scope Metadata. To be used by TDG.VM.WR and TDG.VM.RD */ 50 #define TDCS_CONFIG_FLAGS 0x1110000300000016 51 #define TDCS_TD_CTLS 0x1110000300000017 52 #define TDCS_NOTIFY_ENABLES 0x9100000000000010 53 #define TDCS_TOPOLOGY_ENUM_CONFIGURED 0x9100000000000019 54 55 /* TDCS_CONFIG_FLAGS bits */ 56 #define TDCS_CONFIG_FLEXIBLE_PENDING_VE BIT_ULL(1) 57 58 /* TDCS_TD_CTLS bits */ 59 #define TD_CTLS_PENDING_VE_DISABLE_BIT 0 60 #define TD_CTLS_PENDING_VE_DISABLE BIT_ULL(TD_CTLS_PENDING_VE_DISABLE_BIT) 61 #define TD_CTLS_ENUM_TOPOLOGY_BIT 1 62 #define TD_CTLS_ENUM_TOPOLOGY BIT_ULL(TD_CTLS_ENUM_TOPOLOGY_BIT) 63 #define TD_CTLS_VIRT_CPUID2_BIT 2 64 #define TD_CTLS_VIRT_CPUID2 BIT_ULL(TD_CTLS_VIRT_CPUID2_BIT) 65 #define TD_CTLS_REDUCE_VE_BIT 3 66 #define TD_CTLS_REDUCE_VE BIT_ULL(TD_CTLS_REDUCE_VE_BIT) 67 #define TD_CTLS_LOCK_BIT 63 68 #define TD_CTLS_LOCK BIT_ULL(TD_CTLS_LOCK_BIT) 69 70 /* TDX hypercall Leaf IDs */ 71 #define TDVMCALL_GET_TD_VM_CALL_INFO 0x10000 72 #define TDVMCALL_MAP_GPA 0x10001 73 #define TDVMCALL_GET_QUOTE 0x10002 74 #define TDVMCALL_REPORT_FATAL_ERROR 0x10003 75 76 /* 77 * TDG.VP.VMCALL Status Codes (returned in R10) 78 */ 79 #define TDVMCALL_STATUS_SUCCESS 0x0000000000000000ULL 80 #define TDVMCALL_STATUS_RETRY 0x0000000000000001ULL 81 #define TDVMCALL_STATUS_INVALID_OPERAND 0x8000000000000000ULL 82 #define TDVMCALL_STATUS_ALIGN_ERROR 0x8000000000000002ULL 83 #define TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED 0x8000000000000003ULL 84 85 /* 86 * Bitmasks of exposed registers (with VMM). 87 */ 88 #define TDX_RDX BIT(2) 89 #define TDX_RBX BIT(3) 90 #define TDX_RSI BIT(6) 91 #define TDX_RDI BIT(7) 92 #define TDX_R8 BIT(8) 93 #define TDX_R9 BIT(9) 94 #define TDX_R10 BIT(10) 95 #define TDX_R11 BIT(11) 96 #define TDX_R12 BIT(12) 97 #define TDX_R13 BIT(13) 98 #define TDX_R14 BIT(14) 99 #define TDX_R15 BIT(15) 100 101 /* 102 * These registers are clobbered to hold arguments for each 103 * TDVMCALL. They are safe to expose to the VMM. 104 * Each bit in this mask represents a register ID. Bit field 105 * details can be found in TDX GHCI specification, section 106 * titled "TDCALL [TDG.VP.VMCALL] leaf". 107 */ 108 #define TDVMCALL_EXPOSE_REGS_MASK \ 109 (TDX_RDX | TDX_RBX | TDX_RSI | TDX_RDI | TDX_R8 | TDX_R9 | \ 110 TDX_R10 | TDX_R11 | TDX_R12 | TDX_R13 | TDX_R14 | TDX_R15) 111 112 /* TDX supported page sizes from the TDX module ABI. */ 113 #define TDX_PS_4K 0 114 #define TDX_PS_2M 1 115 #define TDX_PS_1G 2 116 #define TDX_PS_NR (TDX_PS_1G + 1) 117 118 #ifndef __ASSEMBLER__ 119 120 #include <linux/compiler_attributes.h> 121 122 /* 123 * Used in __tdcall*() to gather the input/output registers' values of the 124 * TDCALL instruction when requesting services from the TDX module. This is a 125 * software only structure and not part of the TDX module/VMM ABI 126 */ 127 struct tdx_module_args { 128 /* callee-clobbered */ 129 u64 rcx; 130 u64 rdx; 131 u64 r8; 132 u64 r9; 133 /* extra callee-clobbered */ 134 u64 r10; 135 u64 r11; 136 /* callee-saved + rdi/rsi */ 137 u64 r12; 138 u64 r13; 139 u64 r14; 140 u64 r15; 141 u64 rbx; 142 u64 rdi; 143 u64 rsi; 144 }; 145 146 /* Used to communicate with the TDX module */ 147 u64 __tdcall(u64 fn, struct tdx_module_args *args); 148 u64 __tdcall_ret(u64 fn, struct tdx_module_args *args); 149 u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args); 150 151 /* Used to request services from the VMM */ 152 u64 __tdx_hypercall(struct tdx_module_args *args); 153 154 /* 155 * Wrapper for standard use of __tdx_hypercall with no output aside from 156 * return code. 157 */ 158 static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15) 159 { 160 struct tdx_module_args args = { 161 .r10 = TDX_HYPERCALL_STANDARD, 162 .r11 = fn, 163 .r12 = r12, 164 .r13 = r13, 165 .r14 = r14, 166 .r15 = r15, 167 }; 168 169 return __tdx_hypercall(&args); 170 } 171 172 173 /* Called from __tdx_hypercall() for unrecoverable failure */ 174 void __noreturn __tdx_hypercall_failed(void); 175 176 bool tdx_accept_memory(phys_addr_t start, phys_addr_t end); 177 178 /* 179 * The TDG.VP.VMCALL-Instruction-execution sub-functions are defined 180 * independently from but are currently matched 1:1 with VMX EXIT_REASONs. 181 * Reusing the KVM EXIT_REASON macros makes it easier to connect the host and 182 * guest sides of these calls. 183 */ 184 static __always_inline u64 hcall_func(u64 exit_reason) 185 { 186 return exit_reason; 187 } 188 189 #endif /* !__ASSEMBLER__ */ 190 #endif /* _ASM_X86_SHARED_TDX_H */ 191