92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2021-2022 Intel Corporation */
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#ifndef _ASM_X86_TDX_H
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#define _ASM_X86_TDX_H
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#include <linux/init.h>
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#include <linux/bits.h>
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#include <asm/ptrace.h>
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#include <asm/shared/tdx.h>
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/*
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* SW-defined error codes.
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*
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* Bits 47:40 == 0xFF indicate Reserved status code class that never used by
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* TDX module.
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*/
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#define TDX_ERROR _BITUL(63)
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#define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
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#define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
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#ifndef __ASSEMBLY__
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/*
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* Used to gather the output registers values of the TDCALL and SEAMCALL
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* instructions when requesting services from the TDX module.
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*
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* This is a software only structure and not part of the TDX module/VMM ABI.
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*/
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struct tdx_module_output {
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u64 rcx;
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u64 rdx;
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u64 r8;
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u64 r9;
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u64 r10;
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u64 r11;
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};
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/*
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* Used by the #VE exception handler to gather the #VE exception
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* info from the TDX module. This is a software only structure
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* and not part of the TDX module/VMM ABI.
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*/
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struct ve_info {
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u64 exit_reason;
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u64 exit_qual;
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/* Guest Linear (virtual) Address */
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u64 gla;
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/* Guest Physical Address */
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u64 gpa;
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u32 instr_len;
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u32 instr_info;
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};
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#ifdef CONFIG_INTEL_TDX_GUEST
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void __init tdx_early_init(void);
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/* Used to communicate with the TDX module */
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u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
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struct tdx_module_output *out);
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void tdx_get_ve_info(struct ve_info *ve);
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bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
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void tdx_safe_halt(void);
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bool tdx_early_handle_ve(struct pt_regs *regs);
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#else
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static inline void tdx_early_init(void) { };
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static inline void tdx_safe_halt(void) { };
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static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; }
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#endif /* CONFIG_INTEL_TDX_GUEST */
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#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST)
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long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2,
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unsigned long p3, unsigned long p4);
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#else
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static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4)
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{
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return -ENODEV;
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}
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#endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_TDX_H */
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