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/shared/tdx.h> 12 13/* 14 * SW-defined error codes. 15 * 16 * Bits 47:40 == 0xFF indicate Reserved status code class that never used by 17 * TDX module. 18 */ 19#define TDX_ERROR _BITUL(63) 20#define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40)) 21#define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000)) 22 23#ifndef __ASSEMBLY__ 24 25/* 26 * Used by the #VE exception handler to gather the #VE exception 27 * info from the TDX module. This is a software only structure 28 * and not part of the TDX module/VMM ABI. 29 */ 30struct ve_info { 31 u64 exit_reason; 32 u64 exit_qual; 33 /* Guest Linear (virtual) Address */ 34 u64 gla; 35 /* Guest Physical Address */ 36 u64 gpa; 37 u32 instr_len; 38 u32 instr_info; 39}; 40 41#ifdef CONFIG_INTEL_TDX_GUEST 42 43void __init tdx_early_init(void); 44 45void tdx_get_ve_info(struct ve_info *ve); 46 47bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve); 48 49void tdx_safe_halt(void); 50 51bool tdx_early_handle_ve(struct pt_regs *regs); 52 53int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport); 54 55#else 56 57static inline void tdx_early_init(void) { }; 58static inline void tdx_safe_halt(void) { }; 59 60static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; } 61 62#endif /* CONFIG_INTEL_TDX_GUEST */ 63 64#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST) 65long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2, 66 unsigned long p3, unsigned long p4); 67#else 68static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, 69 unsigned long p2, unsigned long p3, 70 unsigned long p4) 71{ 72 return -ENODEV; 73} 74#endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */ 75#endif /* !__ASSEMBLY__ */ 76#endif /* _ASM_X86_TDX_H */ 77