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