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usr
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src
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linux-headers-6.8.0-36
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arch
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x86
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include
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asm
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tdx.h
/* 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/errno.h> #include <asm/ptrace.h> #include <asm/trapnr.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)) #define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP) #define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD) /* * TDX module SEAMCALL leaf function error codes */ #define TDX_SUCCESS 0ULL #define TDX_RND_NO_ENTROPY 0x8000020300000000ULL #ifndef __ASSEMBLY__ #include <uapi/asm/mce.h> /* * 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); 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); int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport); u64 tdx_hcall_get_quote(u8 *buf, size_t size); #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 */ #ifdef CONFIG_INTEL_TDX_HOST u64 __seamcall(u64 fn, struct tdx_module_args *args); u64 __seamcall_ret(u64 fn, struct tdx_module_args *args); u64 __seamcall_saved_ret(u64 fn, struct tdx_module_args *args); void tdx_init(void); #include <asm/archrandom.h> typedef u64 (*sc_func_t)(u64 fn, struct tdx_module_args *args); static inline u64 sc_retry(sc_func_t func, u64 fn, struct tdx_module_args *args) { int retry = RDRAND_RETRY_LOOPS; u64 ret; do { ret = func(fn, args); } while (ret == TDX_RND_NO_ENTROPY && --retry); return ret; } #define seamcall(_fn, _args) sc_retry(__seamcall, (_fn), (_args)) #define seamcall_ret(_fn, _args) sc_retry(__seamcall_ret, (_fn), (_args)) #define seamcall_saved_ret(_fn, _args) sc_retry(__seamcall_saved_ret, (_fn), (_args)) int tdx_cpu_enable(void); int tdx_enable(void); const char *tdx_dump_mce_info(struct mce *m); #else static inline void tdx_init(void) { } static inline int tdx_cpu_enable(void) { return -ENODEV; } static inline int tdx_enable(void) { return -ENODEV; } static inline const char *tdx_dump_mce_info(struct mce *m) { return NULL; } #endif /* CONFIG_INTEL_TDX_HOST */ #endif /* !__ASSEMBLY__ */ #endif /* _ASM_X86_TDX_H */
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