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 #include <asm/shared/tdx_errno.h> 8 9 #define TDX_HYPERCALL_STANDARD 0 10 11 #define TDX_CPUID_LEAF_ID 0x21 12 #define TDX_IDENT "IntelTDX " 13 14 /* TDX module Call Leaf IDs */ 15 #define TDG_VP_VMCALL 0 16 #define TDG_VP_INFO 1 17 #define TDG_MR_RTMR_EXTEND 2 18 #define TDG_VP_VEINFO_GET 3 19 #define TDG_MR_REPORT 4 20 #define TDG_MEM_PAGE_ACCEPT 6 21 #define TDG_VM_RD 7 22 #define TDG_VM_WR 8 23 24 /* TDX TD attributes */ 25 #define TDX_TD_ATTR_DEBUG_BIT 0 26 #define TDX_TD_ATTR_DEBUG BIT_ULL(TDX_TD_ATTR_DEBUG_BIT) 27 #define TDX_TD_ATTR_HGS_PLUS_PROF_BIT 4 28 #define TDX_TD_ATTR_HGS_PLUS_PROF BIT_ULL(TDX_TD_ATTR_HGS_PLUS_PROF_BIT) 29 #define TDX_TD_ATTR_PERF_PROF_BIT 5 30 #define TDX_TD_ATTR_PERF_PROF BIT_ULL(TDX_TD_ATTR_PERF_PROF_BIT) 31 #define TDX_TD_ATTR_PMT_PROF_BIT 6 32 #define TDX_TD_ATTR_PMT_PROF BIT_ULL(TDX_TD_ATTR_PMT_PROF_BIT) 33 #define TDX_TD_ATTR_ICSSD_BIT 16 34 #define TDX_TD_ATTR_ICSSD BIT_ULL(TDX_TD_ATTR_ICSSD_BIT) 35 #define TDX_TD_ATTR_LASS_BIT 27 36 #define TDX_TD_ATTR_LASS BIT_ULL(TDX_TD_ATTR_LASS_BIT) 37 #define TDX_TD_ATTR_SEPT_VE_DISABLE_BIT 28 38 #define TDX_TD_ATTR_SEPT_VE_DISABLE BIT_ULL(TDX_TD_ATTR_SEPT_VE_DISABLE_BIT) 39 #define TDX_TD_ATTR_MIGRATABLE_BIT 29 40 #define TDX_TD_ATTR_MIGRATABLE BIT_ULL(TDX_TD_ATTR_MIGRATABLE_BIT) 41 #define TDX_TD_ATTR_PKS_BIT 30 42 #define TDX_TD_ATTR_PKS BIT_ULL(TDX_TD_ATTR_PKS_BIT) 43 #define TDX_TD_ATTR_KL_BIT 31 44 #define TDX_TD_ATTR_KL BIT_ULL(TDX_TD_ATTR_KL_BIT) 45 #define TDX_TD_ATTR_TPA_BIT 62 46 #define TDX_TD_ATTR_TPA BIT_ULL(TDX_TD_ATTR_TPA_BIT) 47 #define TDX_TD_ATTR_PERFMON_BIT 63 48 #define TDX_TD_ATTR_PERFMON BIT_ULL(TDX_TD_ATTR_PERFMON_BIT) 49 50 /* TDX TD-Scope Metadata. To be used by TDG.VM.WR and TDG.VM.RD */ 51 #define TDCS_CONFIG_FLAGS 0x1110000300000016 52 #define TDCS_TD_CTLS 0x1110000300000017 53 #define TDCS_NOTIFY_ENABLES 0x9100000000000010 54 #define TDCS_TOPOLOGY_ENUM_CONFIGURED 0x9100000000000019 55 56 /* TDCS_CONFIG_FLAGS bits */ 57 #define TDCS_CONFIG_FLEXIBLE_PENDING_VE BIT_ULL(1) 58 59 /* TDCS_TD_CTLS bits */ 60 #define TD_CTLS_PENDING_VE_DISABLE_BIT 0 61 #define TD_CTLS_PENDING_VE_DISABLE BIT_ULL(TD_CTLS_PENDING_VE_DISABLE_BIT) 62 #define TD_CTLS_ENUM_TOPOLOGY_BIT 1 63 #define TD_CTLS_ENUM_TOPOLOGY BIT_ULL(TD_CTLS_ENUM_TOPOLOGY_BIT) 64 #define TD_CTLS_VIRT_CPUID2_BIT 2 65 #define TD_CTLS_VIRT_CPUID2 BIT_ULL(TD_CTLS_VIRT_CPUID2_BIT) 66 #define TD_CTLS_REDUCE_VE_BIT 3 67 #define TD_CTLS_REDUCE_VE BIT_ULL(TD_CTLS_REDUCE_VE_BIT) 68 #define TD_CTLS_LOCK_BIT 63 69 #define TD_CTLS_LOCK BIT_ULL(TD_CTLS_LOCK_BIT) 70 71 /* TDX hypercall Leaf IDs */ 72 #define TDVMCALL_GET_TD_VM_CALL_INFO 0x10000 73 #define TDVMCALL_MAP_GPA 0x10001 74 #define TDVMCALL_GET_QUOTE 0x10002 75 #define TDVMCALL_REPORT_FATAL_ERROR 0x10003 76 #define TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0x10004ULL 77 78 /* 79 * TDG.VP.VMCALL Status Codes (returned in R10) 80 */ 81 #define TDVMCALL_STATUS_SUCCESS 0x0000000000000000ULL 82 #define TDVMCALL_STATUS_RETRY 0x0000000000000001ULL 83 #define TDVMCALL_STATUS_INVALID_OPERAND 0x8000000000000000ULL 84 #define TDVMCALL_STATUS_ALIGN_ERROR 0x8000000000000002ULL 85 #define TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED 0x8000000000000003ULL 86 87 /* 88 * Bitmasks of exposed registers (with VMM). 89 */ 90 #define TDX_RDX BIT(2) 91 #define TDX_RBX BIT(3) 92 #define TDX_RSI BIT(6) 93 #define TDX_RDI BIT(7) 94 #define TDX_R8 BIT(8) 95 #define TDX_R9 BIT(9) 96 #define TDX_R10 BIT(10) 97 #define TDX_R11 BIT(11) 98 #define TDX_R12 BIT(12) 99 #define TDX_R13 BIT(13) 100 #define TDX_R14 BIT(14) 101 #define TDX_R15 BIT(15) 102 103 /* 104 * These registers are clobbered to hold arguments for each 105 * TDVMCALL. They are safe to expose to the VMM. 106 * Each bit in this mask represents a register ID. Bit field 107 * details can be found in TDX GHCI specification, section 108 * titled "TDCALL [TDG.VP.VMCALL] leaf". 109 */ 110 #define TDVMCALL_EXPOSE_REGS_MASK \ 111 (TDX_RDX | TDX_RBX | TDX_RSI | TDX_RDI | TDX_R8 | TDX_R9 | \ 112 TDX_R10 | TDX_R11 | TDX_R12 | TDX_R13 | TDX_R14 | TDX_R15) 113 114 /* TDX supported page sizes from the TDX module ABI. */ 115 #define TDX_PS_4K 0 116 #define TDX_PS_2M 1 117 #define TDX_PS_1G 2 118 #define TDX_PS_NR (TDX_PS_1G + 1) 119 120 #ifndef __ASSEMBLER__ 121 122 #include <linux/compiler_attributes.h> 123 124 /* 125 * Used in __tdcall*() to gather the input/output registers' values of the 126 * TDCALL instruction when requesting services from the TDX module. This is a 127 * software only structure and not part of the TDX module/VMM ABI 128 */ 129 struct tdx_module_args { 130 /* callee-clobbered */ 131 u64 rcx; 132 u64 rdx; 133 u64 r8; 134 u64 r9; 135 /* extra callee-clobbered */ 136 u64 r10; 137 u64 r11; 138 /* callee-saved + rdi/rsi */ 139 u64 r12; 140 u64 r13; 141 u64 r14; 142 u64 r15; 143 u64 rbx; 144 u64 rdi; 145 u64 rsi; 146 }; 147 148 /* Used to communicate with the TDX module */ 149 u64 __tdcall(u64 fn, struct tdx_module_args *args); 150 u64 __tdcall_ret(u64 fn, struct tdx_module_args *args); 151 u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args); 152 153 /* Used to request services from the VMM */ 154 u64 __tdx_hypercall(struct tdx_module_args *args); 155 156 /* 157 * Wrapper for standard use of __tdx_hypercall with no output aside from 158 * return code. 159 */ 160 static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15) 161 { 162 struct tdx_module_args args = { 163 .r10 = TDX_HYPERCALL_STANDARD, 164 .r11 = fn, 165 .r12 = r12, 166 .r13 = r13, 167 .r14 = r14, 168 .r15 = r15, 169 }; 170 171 return __tdx_hypercall(&args); 172 } 173 174 175 /* Called from __tdx_hypercall() for unrecoverable failure */ 176 void __noreturn __tdx_hypercall_failed(void); 177 178 bool tdx_accept_memory(phys_addr_t start, phys_addr_t end); 179 180 /* 181 * The TDG.VP.VMCALL-Instruction-execution sub-functions are defined 182 * independently from but are currently matched 1:1 with VMX EXIT_REASONs. 183 * Reusing the KVM EXIT_REASON macros makes it easier to connect the host and 184 * guest sides of these calls. 185 */ 186 static __always_inline u64 hcall_func(u64 exit_reason) 187 { 188 return exit_reason; 189 } 190 191 #endif /* !__ASSEMBLER__ */ 192 #endif /* _ASM_X86_SHARED_TDX_H */ 193