1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_SHARED_TDX_H 3 #define _ASM_X86_SHARED_TDX_H 4 5 #include <linux/bits.h> 6 #include <linux/types.h> 7 8 #define TDX_HYPERCALL_STANDARD 0 9 10 #define TDX_HCALL_HAS_OUTPUT BIT(0) 11 #define TDX_HCALL_ISSUE_STI BIT(1) 12 13 #define TDX_CPUID_LEAF_ID 0x21 14 #define TDX_IDENT "IntelTDX " 15 16 #ifndef __ASSEMBLY__ 17 18 /* 19 * Used in __tdx_hypercall() to pass down and get back registers' values of 20 * the TDCALL instruction when requesting services from the VMM. 21 * 22 * This is a software only structure and not part of the TDX module/VMM ABI. 23 */ 24 struct tdx_hypercall_args { 25 u64 r10; 26 u64 r11; 27 u64 r12; 28 u64 r13; 29 u64 r14; 30 u64 r15; 31 }; 32 33 /* Used to request services from the VMM */ 34 u64 __tdx_hypercall(struct tdx_hypercall_args *args, unsigned long flags); 35 36 /* Called from __tdx_hypercall() for unrecoverable failure */ 37 void __tdx_hypercall_failed(void); 38 39 #endif /* !__ASSEMBLY__ */ 40 #endif /* _ASM_X86_SHARED_TDX_H */ 41