12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091 |
- /* SPDX-License-Identifier: GPL-2.0 */
- /* Copyright (C) 2021-2022 Intel Corporation */
- #ifndef _ASM_X86_TDX_H
- #define _ASM_X86_TDX_H
- #include <linux/init.h>
- #include <linux/bits.h>
- #include <asm/ptrace.h>
- #include <asm/shared/tdx.h>
- /*
- * SW-defined error codes.
- *
- * Bits 47:40 == 0xFF indicate Reserved status code class that never used by
- * TDX module.
- */
- #define TDX_ERROR _BITUL(63)
- #define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40))
- #define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000))
- #ifndef __ASSEMBLY__
- /*
- * Used to gather the output registers values of the TDCALL and SEAMCALL
- * instructions 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_output {
- u64 rcx;
- u64 rdx;
- u64 r8;
- u64 r9;
- u64 r10;
- u64 r11;
- };
- /*
- * Used by the #VE exception handler to gather the #VE exception
- * info from the TDX module. This is a software only structure
- * and not part of the TDX module/VMM ABI.
- */
- struct ve_info {
- u64 exit_reason;
- u64 exit_qual;
- /* Guest Linear (virtual) Address */
- u64 gla;
- /* Guest Physical Address */
- u64 gpa;
- u32 instr_len;
- u32 instr_info;
- };
- #ifdef CONFIG_INTEL_TDX_GUEST
- void __init tdx_early_init(void);
- /* Used to communicate with the TDX module */
- u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
- struct tdx_module_output *out);
- void tdx_get_ve_info(struct ve_info *ve);
- bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);
- void tdx_safe_halt(void);
- bool tdx_early_handle_ve(struct pt_regs *regs);
- #else
- static inline void tdx_early_init(void) { };
- static inline void tdx_safe_halt(void) { };
- static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; }
- #endif /* CONFIG_INTEL_TDX_GUEST */
- #if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST)
- long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2,
- unsigned long p3, unsigned long p4);
- #else
- static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1,
- unsigned long p2, unsigned long p3,
- unsigned long p4)
- {
- return -ENODEV;
- }
- #endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */
- #endif /* !__ASSEMBLY__ */
- #endif /* _ASM_X86_TDX_H */
|