1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2021-2022 Intel Corporation */ 3 #ifndef _ASM_X86_TDX_H 4 #define _ASM_X86_TDX_H 5 6 #include <linux/init.h> 7 #include <linux/bits.h> 8 9 #include <asm/errno.h> 10 #include <asm/ptrace.h> 11 #include <asm/trapnr.h> 12 #include <asm/shared/tdx.h> 13 14 /* 15 * SW-defined error codes. 16 * 17 * Bits 47:40 == 0xFF indicate Reserved status code class that never used by 18 * TDX module. 19 */ 20 #define TDX_ERROR _BITUL(63) 21 #define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40)) 22 #define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000)) 23 24 #define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP) 25 #define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD) 26 27 #ifndef __ASSEMBLY__ 28 29 /* 30 * Used by the #VE exception handler to gather the #VE exception 31 * info from the TDX module. This is a software only structure 32 * and not part of the TDX module/VMM ABI. 33 */ 34 struct ve_info { 35 u64 exit_reason; 36 u64 exit_qual; 37 /* Guest Linear (virtual) Address */ 38 u64 gla; 39 /* Guest Physical Address */ 40 u64 gpa; 41 u32 instr_len; 42 u32 instr_info; 43 }; 44 45 #ifdef CONFIG_INTEL_TDX_GUEST 46 47 void __init tdx_early_init(void); 48 49 void tdx_get_ve_info(struct ve_info *ve); 50 51 bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve); 52 53 void tdx_safe_halt(void); 54 55 bool tdx_early_handle_ve(struct pt_regs *regs); 56 57 int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport); 58 59 #else 60 61 static inline void tdx_early_init(void) { }; 62 static inline void tdx_safe_halt(void) { }; 63 64 static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; } 65 66 #endif /* CONFIG_INTEL_TDX_GUEST */ 67 68 #if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST) 69 long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2, 70 unsigned long p3, unsigned long p4); 71 #else 72 static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, 73 unsigned long p2, unsigned long p3, 74 unsigned long p4) 75 { 76 return -ENODEV; 77 } 78 #endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */ 79 80 #ifdef CONFIG_INTEL_TDX_HOST 81 u64 __seamcall(u64 fn, struct tdx_module_args *args); 82 u64 __seamcall_ret(u64 fn, struct tdx_module_args *args); 83 u64 __seamcall_saved_ret(u64 fn, struct tdx_module_args *args); 84 #endif /* CONFIG_INTEL_TDX_HOST */ 85 86 #endif /* !__ASSEMBLY__ */ 87 #endif /* _ASM_X86_TDX_H */ 88