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 #include <linux/mmzone.h> 9 #include <linux/kvm_types.h> 10 11 #include <asm/errno.h> 12 #include <asm/ptrace.h> 13 #include <asm/trapnr.h> 14 #include <asm/shared/tdx.h> 15 16 /* 17 * SW-defined error codes. 18 * 19 * Bits 47:40 == 0xFF indicate Reserved status code class that never used by 20 * TDX module. 21 */ 22 #define TDX_ERROR _BITUL(63) 23 #define TDX_NON_RECOVERABLE _BITUL(62) 24 #define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40)) 25 #define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000)) 26 27 #define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP) 28 #define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD) 29 30 /* 31 * TDX module SEAMCALL leaf function error codes 32 */ 33 #define TDX_SUCCESS 0ULL 34 #define TDX_RND_NO_ENTROPY 0x8000020300000000ULL 35 36 /* Bit definitions of TDX_FEATURES0 metadata field */ 37 #define TDX_FEATURES0_TD_PRESERVING BIT_ULL(1) 38 #define TDX_FEATURES0_NO_RBP_MOD BIT_ULL(18) 39 40 #ifndef __ASSEMBLER__ 41 42 #include <uapi/asm/mce.h> 43 #include <asm/tdx_global_metadata.h> 44 #include <linux/pgtable.h> 45 46 /* 47 * TDX module and P-SEAMLDR version convention: "major.minor.update" 48 * (e.g., "1.5.08") with zero-padded two-digit update field. 49 */ 50 #define TDX_VERSION_FMT "%u.%u.%02u" 51 52 /* 53 * Used by the #VE exception handler to gather the #VE exception 54 * info from the TDX module. This is a software only structure 55 * and not part of the TDX module/VMM ABI. 56 */ 57 struct ve_info { 58 u64 exit_reason; 59 u64 exit_qual; 60 /* Guest Linear (virtual) Address */ 61 u64 gla; 62 /* Guest Physical Address */ 63 u64 gpa; 64 u32 instr_len; 65 u32 instr_info; 66 }; 67 68 #ifdef CONFIG_INTEL_TDX_GUEST 69 70 void __init tdx_early_init(void); 71 72 void tdx_get_ve_info(struct ve_info *ve); 73 74 bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve); 75 76 void tdx_halt(void); 77 78 bool tdx_early_handle_ve(struct pt_regs *regs); 79 80 int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport); 81 82 int tdx_mcall_extend_rtmr(u8 index, u8 *data); 83 84 u64 tdx_hcall_get_quote(u8 *buf, size_t size); 85 86 void __init tdx_dump_attributes(u64 td_attr); 87 void __init tdx_dump_td_ctls(u64 td_ctls); 88 89 #else 90 91 static inline void tdx_early_init(void) { }; 92 static inline void tdx_halt(void) { }; 93 94 static inline bool tdx_early_handle_ve(struct pt_regs *regs) { return false; } 95 96 #endif /* CONFIG_INTEL_TDX_GUEST */ 97 98 #if defined(CONFIG_KVM_GUEST) && defined(CONFIG_INTEL_TDX_GUEST) 99 long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, unsigned long p2, 100 unsigned long p3, unsigned long p4); 101 #else 102 static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, 103 unsigned long p2, unsigned long p3, 104 unsigned long p4) 105 { 106 return -ENODEV; 107 } 108 #endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */ 109 110 #ifdef CONFIG_INTEL_TDX_HOST 111 void tdx_init(void); 112 int tdx_cpu_enable(void); 113 const char *tdx_dump_mce_info(struct mce *m); 114 const struct tdx_sys_info *tdx_get_sysinfo(void); 115 116 static inline bool tdx_supports_runtime_update(const struct tdx_sys_info *sysinfo) 117 { 118 return sysinfo->features.tdx_features0 & TDX_FEATURES0_TD_PRESERVING; 119 } 120 121 int tdx_guest_keyid_alloc(void); 122 u32 tdx_get_nr_guest_keyids(void); 123 void tdx_guest_keyid_free(unsigned int keyid); 124 125 void tdx_quirk_reset_paddr(unsigned long base, unsigned long size); 126 127 struct tdx_td { 128 /* TD root structure: */ 129 struct page *tdr_page; 130 131 int tdcs_nr_pages; 132 /* TD control structure: */ 133 struct page **tdcs_pages; 134 135 /* Size of `tdcx_pages` in struct tdx_vp */ 136 int tdcx_nr_pages; 137 }; 138 139 struct tdx_vp { 140 /* TDVP root page */ 141 struct page *tdvpr_page; 142 /* precalculated page_to_phys(tdvpr_page) for use in noinstr code */ 143 phys_addr_t tdvpr_pa; 144 145 /* TD vCPU control structure: */ 146 struct page **tdcx_pages; 147 }; 148 149 void tdx_sys_disable(void); 150 151 u64 tdh_vp_enter(struct tdx_vp *vp, struct tdx_module_args *args); 152 u64 tdh_mng_addcx(struct tdx_td *td, struct page *tdcs_page); 153 u64 tdh_mem_page_add(struct tdx_td *td, u64 gpa, kvm_pfn_t pfn, struct page *source, 154 u64 *ext_err1, u64 *ext_err2); 155 u64 tdh_mem_sept_add(struct tdx_td *td, u64 gpa, enum pg_level level, struct page *page, u64 *ext_err1, u64 *ext_err2); 156 u64 tdh_vp_addcx(struct tdx_vp *vp, struct page *tdcx_page); 157 u64 tdh_mem_page_aug(struct tdx_td *td, u64 gpa, enum pg_level level, kvm_pfn_t pfn, 158 u64 *ext_err1, u64 *ext_err2); 159 u64 tdh_mem_range_block(struct tdx_td *td, u64 gpa, enum pg_level level, u64 *ext_err1, u64 *ext_err2); 160 u64 tdh_mng_key_config(struct tdx_td *td); 161 u64 tdh_mng_create(struct tdx_td *td, u16 hkid); 162 u64 tdh_vp_create(struct tdx_td *td, struct tdx_vp *vp); 163 u64 tdh_mng_rd(struct tdx_td *td, u64 field, u64 *data); 164 u64 tdh_mr_extend(struct tdx_td *td, u64 gpa, u64 *ext_err1, u64 *ext_err2); 165 u64 tdh_mr_finalize(struct tdx_td *td); 166 u64 tdh_vp_flush(struct tdx_vp *vp); 167 u64 tdh_mng_vpflushdone(struct tdx_td *td); 168 u64 tdh_mng_key_freeid(struct tdx_td *td); 169 u64 tdh_mng_init(struct tdx_td *td, u64 td_params, u64 *extended_err); 170 u64 tdh_vp_init(struct tdx_vp *vp, u64 initial_rcx, u32 x2apicid); 171 u64 tdh_vp_rd(struct tdx_vp *vp, u64 field, u64 *data); 172 u64 tdh_vp_wr(struct tdx_vp *vp, u64 field, u64 data, u64 mask); 173 u64 tdh_phymem_page_reclaim(struct page *page, u64 *tdx_pt, u64 *tdx_owner, u64 *tdx_size); 174 u64 tdh_mem_track(struct tdx_td *tdr); 175 u64 tdh_mem_page_remove(struct tdx_td *td, u64 gpa, enum pg_level level, u64 *ext_err1, u64 *ext_err2); 176 u64 tdh_phymem_cache_wb(bool resume); 177 u64 tdh_phymem_page_wbinvd_tdr(struct tdx_td *td); 178 u64 tdh_phymem_page_wbinvd_hkid(u64 hkid, kvm_pfn_t pfn); 179 #else 180 static inline void tdx_init(void) { } 181 static inline u32 tdx_get_nr_guest_keyids(void) { return 0; } 182 static inline const char *tdx_dump_mce_info(struct mce *m) { return NULL; } 183 static inline const struct tdx_sys_info *tdx_get_sysinfo(void) { return NULL; } 184 static inline void tdx_sys_disable(void) { } 185 #endif /* CONFIG_INTEL_TDX_HOST */ 186 187 #endif /* !__ASSEMBLER__ */ 188 #endif /* _ASM_X86_TDX_H */ 189