/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_SHARED_TDX_H #define _ASM_X86_SHARED_TDX_H #include <linux/bits.h> #include <linux/types.h> #define TDX_HYPERCALL_STANDARD … #define TDX_CPUID_LEAF_ID … #define TDX_IDENT … /* TDX module Call Leaf IDs */ #define TDG_VP_VMCALL … #define TDG_VP_INFO … #define TDG_VP_VEINFO_GET … #define TDG_MR_REPORT … #define TDG_MEM_PAGE_ACCEPT … #define TDG_VM_WR … /* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */ #define TDCS_NOTIFY_ENABLES … /* TDX hypercall Leaf IDs */ #define TDVMCALL_MAP_GPA … #define TDVMCALL_GET_QUOTE … #define TDVMCALL_REPORT_FATAL_ERROR … #define TDVMCALL_STATUS_RETRY … /* * Bitmasks of exposed registers (with VMM). */ #define TDX_RDX … #define TDX_RBX … #define TDX_RSI … #define TDX_RDI … #define TDX_R8 … #define TDX_R9 … #define TDX_R10 … #define TDX_R11 … #define TDX_R12 … #define TDX_R13 … #define TDX_R14 … #define TDX_R15 … /* * These registers are clobbered to hold arguments for each * TDVMCALL. They are safe to expose to the VMM. * Each bit in this mask represents a register ID. Bit field * details can be found in TDX GHCI specification, section * titled "TDCALL [TDG.VP.VMCALL] leaf". */ #define TDVMCALL_EXPOSE_REGS_MASK … /* TDX supported page sizes from the TDX module ABI. */ #define TDX_PS_4K … #define TDX_PS_2M … #define TDX_PS_1G … #define TDX_PS_NR … #ifndef __ASSEMBLY__ #include <linux/compiler_attributes.h> /* * Used in __tdcall*() to gather the input/output registers' values of the * TDCALL instruction when requesting services from the TDX module. This is a * software only structure and not part of the TDX module/VMM ABI */ struct tdx_module_args { /* callee-clobbered */ u64 rcx; u64 rdx; u64 r8; u64 r9; /* extra callee-clobbered */ u64 r10; u64 r11; /* callee-saved + rdi/rsi */ u64 r12; u64 r13; u64 r14; u64 r15; u64 rbx; u64 rdi; u64 rsi; }; /* Used to communicate with the TDX module */ u64 __tdcall(u64 fn, struct tdx_module_args *args); u64 __tdcall_ret(u64 fn, struct tdx_module_args *args); u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args); /* Used to request services from the VMM */ u64 __tdx_hypercall(struct tdx_module_args *args); /* * Wrapper for standard use of __tdx_hypercall with no output aside from * return code. */ static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15) { struct tdx_module_args args = { .r10 = TDX_HYPERCALL_STANDARD, .r11 = fn, .r12 = r12, .r13 = r13, .r14 = r14, .r15 = r15, }; return __tdx_hypercall(&args); } /* Called from __tdx_hypercall() for unrecoverable failure */ void __noreturn __tdx_hypercall_failed(void); bool tdx_accept_memory(phys_addr_t start, phys_addr_t end); /* * The TDG.VP.VMCALL-Instruction-execution sub-functions are defined * independently from but are currently matched 1:1 with VMX EXIT_REASONs. * Reusing the KVM EXIT_REASON macros makes it easier to connect the host and * guest sides of these calls. */ static __always_inline u64 hcall_func(u64 exit_reason) { return exit_reason; } #endif /* !__ASSEMBLY__ */ #endif /* _ASM_X86_SHARED_TDX_H */
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