1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_MSHYPER_H 3 #define _ASM_X86_MSHYPER_H 4 5 #include <linux/types.h> 6 #include <linux/nmi.h> 7 #include <linux/msi.h> 8 #include <asm/io.h> 9 #include <asm/hyperv-tlfs.h> 10 #include <asm/nospec-branch.h> 11 #include <asm/paravirt.h> 12 #include <asm/mshyperv.h> 13 14 /* 15 * Hyper-V always provides a single IO-APIC at this MMIO address. 16 * Ideally, the value should be looked up in ACPI tables, but it 17 * is needed for mapping the IO-APIC early in boot on Confidential 18 * VMs, before ACPI functions can be used. 19 */ 20 #define HV_IOAPIC_BASE_ADDRESS 0xfec00000 21 22 #define HV_VTL_NORMAL 0x0 23 #define HV_VTL_SECURE 0x1 24 #define HV_VTL_MGMT 0x2 25 26 union hv_ghcb; 27 28 DECLARE_STATIC_KEY_FALSE(isolation_type_snp); 29 DECLARE_STATIC_KEY_FALSE(isolation_type_en_snp); 30 DECLARE_STATIC_KEY_FALSE(isolation_type_tdx); 31 32 typedef int (*hyperv_fill_flush_list_func)( 33 struct hv_guest_mapping_flush_list *flush, 34 void *data); 35 36 void hyperv_vector_handler(struct pt_regs *regs); 37 38 static inline unsigned char hv_get_nmi_reason(void) 39 { 40 return 0; 41 } 42 43 #if IS_ENABLED(CONFIG_HYPERV) 44 extern int hyperv_init_cpuhp; 45 extern bool hyperv_paravisor_present; 46 47 extern void *hv_hypercall_pg; 48 49 extern u64 hv_current_partition_id; 50 51 extern union hv_ghcb * __percpu *hv_ghcb_pg; 52 53 extern bool hv_isolation_type_en_snp(void); 54 bool hv_isolation_type_tdx(void); 55 u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2); 56 57 /* 58 * DEFAULT INIT GPAT and SEGMENT LIMIT value in struct VMSA 59 * to start AP in enlightened SEV guest. 60 */ 61 #define HV_AP_INIT_GPAT_DEFAULT 0x0007040600070406ULL 62 #define HV_AP_SEGMENT_LIMIT 0xffffffff 63 64 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); 65 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); 66 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); 67 68 /* 69 * If the hypercall involves no input or output parameters, the hypervisor 70 * ignores the corresponding GPA pointer. 71 */ 72 static inline u64 hv_do_hypercall(u64 control, void *input, void *output) 73 { 74 u64 input_address = input ? virt_to_phys(input) : 0; 75 u64 output_address = output ? virt_to_phys(output) : 0; 76 u64 hv_status; 77 78 #ifdef CONFIG_X86_64 79 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) 80 return hv_tdx_hypercall(control, input_address, output_address); 81 82 if (hv_isolation_type_en_snp()) { 83 __asm__ __volatile__("mov %4, %%r8\n" 84 "vmmcall" 85 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 86 "+c" (control), "+d" (input_address) 87 : "r" (output_address) 88 : "cc", "memory", "r8", "r9", "r10", "r11"); 89 return hv_status; 90 } 91 92 if (!hv_hypercall_pg) 93 return U64_MAX; 94 95 __asm__ __volatile__("mov %4, %%r8\n" 96 CALL_NOSPEC 97 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 98 "+c" (control), "+d" (input_address) 99 : "r" (output_address), 100 THUNK_TARGET(hv_hypercall_pg) 101 : "cc", "memory", "r8", "r9", "r10", "r11"); 102 #else 103 u32 input_address_hi = upper_32_bits(input_address); 104 u32 input_address_lo = lower_32_bits(input_address); 105 u32 output_address_hi = upper_32_bits(output_address); 106 u32 output_address_lo = lower_32_bits(output_address); 107 108 if (!hv_hypercall_pg) 109 return U64_MAX; 110 111 __asm__ __volatile__(CALL_NOSPEC 112 : "=A" (hv_status), 113 "+c" (input_address_lo), ASM_CALL_CONSTRAINT 114 : "A" (control), 115 "b" (input_address_hi), 116 "D"(output_address_hi), "S"(output_address_lo), 117 THUNK_TARGET(hv_hypercall_pg) 118 : "cc", "memory"); 119 #endif /* !x86_64 */ 120 return hv_status; 121 } 122 123 /* Hypercall to the L0 hypervisor */ 124 static inline u64 hv_do_nested_hypercall(u64 control, void *input, void *output) 125 { 126 return hv_do_hypercall(control | HV_HYPERCALL_NESTED, input, output); 127 } 128 129 /* Fast hypercall with 8 bytes of input and no output */ 130 static inline u64 _hv_do_fast_hypercall8(u64 control, u64 input1) 131 { 132 u64 hv_status; 133 134 #ifdef CONFIG_X86_64 135 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) 136 return hv_tdx_hypercall(control, input1, 0); 137 138 if (hv_isolation_type_en_snp()) { 139 __asm__ __volatile__( 140 "vmmcall" 141 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 142 "+c" (control), "+d" (input1) 143 :: "cc", "r8", "r9", "r10", "r11"); 144 } else { 145 __asm__ __volatile__(CALL_NOSPEC 146 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 147 "+c" (control), "+d" (input1) 148 : THUNK_TARGET(hv_hypercall_pg) 149 : "cc", "r8", "r9", "r10", "r11"); 150 } 151 #else 152 { 153 u32 input1_hi = upper_32_bits(input1); 154 u32 input1_lo = lower_32_bits(input1); 155 156 __asm__ __volatile__ (CALL_NOSPEC 157 : "=A"(hv_status), 158 "+c"(input1_lo), 159 ASM_CALL_CONSTRAINT 160 : "A" (control), 161 "b" (input1_hi), 162 THUNK_TARGET(hv_hypercall_pg) 163 : "cc", "edi", "esi"); 164 } 165 #endif 166 return hv_status; 167 } 168 169 static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) 170 { 171 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT; 172 173 return _hv_do_fast_hypercall8(control, input1); 174 } 175 176 static inline u64 hv_do_fast_nested_hypercall8(u16 code, u64 input1) 177 { 178 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED; 179 180 return _hv_do_fast_hypercall8(control, input1); 181 } 182 183 /* Fast hypercall with 16 bytes of input */ 184 static inline u64 _hv_do_fast_hypercall16(u64 control, u64 input1, u64 input2) 185 { 186 u64 hv_status; 187 188 #ifdef CONFIG_X86_64 189 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) 190 return hv_tdx_hypercall(control, input1, input2); 191 192 if (hv_isolation_type_en_snp()) { 193 __asm__ __volatile__("mov %4, %%r8\n" 194 "vmmcall" 195 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 196 "+c" (control), "+d" (input1) 197 : "r" (input2) 198 : "cc", "r8", "r9", "r10", "r11"); 199 } else { 200 __asm__ __volatile__("mov %4, %%r8\n" 201 CALL_NOSPEC 202 : "=a" (hv_status), ASM_CALL_CONSTRAINT, 203 "+c" (control), "+d" (input1) 204 : "r" (input2), 205 THUNK_TARGET(hv_hypercall_pg) 206 : "cc", "r8", "r9", "r10", "r11"); 207 } 208 #else 209 { 210 u32 input1_hi = upper_32_bits(input1); 211 u32 input1_lo = lower_32_bits(input1); 212 u32 input2_hi = upper_32_bits(input2); 213 u32 input2_lo = lower_32_bits(input2); 214 215 __asm__ __volatile__ (CALL_NOSPEC 216 : "=A"(hv_status), 217 "+c"(input1_lo), ASM_CALL_CONSTRAINT 218 : "A" (control), "b" (input1_hi), 219 "D"(input2_hi), "S"(input2_lo), 220 THUNK_TARGET(hv_hypercall_pg) 221 : "cc"); 222 } 223 #endif 224 return hv_status; 225 } 226 227 static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) 228 { 229 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT; 230 231 return _hv_do_fast_hypercall16(control, input1, input2); 232 } 233 234 static inline u64 hv_do_fast_nested_hypercall16(u16 code, u64 input1, u64 input2) 235 { 236 u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED; 237 238 return _hv_do_fast_hypercall16(control, input1, input2); 239 } 240 241 extern struct hv_vp_assist_page **hv_vp_assist_page; 242 243 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 244 { 245 if (!hv_vp_assist_page) 246 return NULL; 247 248 return hv_vp_assist_page[cpu]; 249 } 250 251 void __init hyperv_init(void); 252 void hyperv_setup_mmu_ops(void); 253 void set_hv_tscchange_cb(void (*cb)(void)); 254 void clear_hv_tscchange_cb(void); 255 void hyperv_stop_tsc_emulation(void); 256 int hyperv_flush_guest_mapping(u64 as); 257 int hyperv_flush_guest_mapping_range(u64 as, 258 hyperv_fill_flush_list_func fill_func, void *data); 259 int hyperv_fill_flush_guest_mapping_list( 260 struct hv_guest_mapping_flush_list *flush, 261 u64 start_gfn, u64 end_gfn); 262 263 #ifdef CONFIG_X86_64 264 void hv_apic_init(void); 265 void __init hv_init_spinlocks(void); 266 bool hv_vcpu_is_preempted(int vcpu); 267 #else 268 static inline void hv_apic_init(void) {} 269 #endif 270 271 struct irq_domain *hv_create_pci_msi_domain(void); 272 273 int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, 274 struct hv_interrupt_entry *entry); 275 int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); 276 277 #ifdef CONFIG_AMD_MEM_ENCRYPT 278 bool hv_ghcb_negotiate_protocol(void); 279 void __noreturn hv_ghcb_terminate(unsigned int set, unsigned int reason); 280 int hv_snp_boot_ap(int cpu, unsigned long start_ip); 281 #else 282 static inline bool hv_ghcb_negotiate_protocol(void) { return false; } 283 static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {} 284 static inline int hv_snp_boot_ap(int cpu, unsigned long start_ip) { return 0; } 285 #endif 286 287 extern bool hv_isolation_type_snp(void); 288 289 #if defined(CONFIG_AMD_MEM_ENCRYPT) || defined(CONFIG_INTEL_TDX_GUEST) 290 void hv_vtom_init(void); 291 void hv_ivm_msr_write(u64 msr, u64 value); 292 void hv_ivm_msr_read(u64 msr, u64 *value); 293 #else 294 static inline void hv_vtom_init(void) {} 295 static inline void hv_ivm_msr_write(u64 msr, u64 value) {} 296 static inline void hv_ivm_msr_read(u64 msr, u64 *value) {} 297 #endif 298 299 static inline bool hv_is_synic_reg(unsigned int reg) 300 { 301 return (reg >= HV_REGISTER_SCONTROL) && 302 (reg <= HV_REGISTER_SINT15); 303 } 304 305 static inline bool hv_is_sint_reg(unsigned int reg) 306 { 307 return (reg >= HV_REGISTER_SINT0) && 308 (reg <= HV_REGISTER_SINT15); 309 } 310 311 u64 hv_get_register(unsigned int reg); 312 void hv_set_register(unsigned int reg, u64 value); 313 u64 hv_get_non_nested_register(unsigned int reg); 314 void hv_set_non_nested_register(unsigned int reg, u64 value); 315 316 static __always_inline u64 hv_raw_get_register(unsigned int reg) 317 { 318 return __rdmsr(reg); 319 } 320 321 #else /* CONFIG_HYPERV */ 322 static inline void hyperv_init(void) {} 323 static inline void hyperv_setup_mmu_ops(void) {} 324 static inline void set_hv_tscchange_cb(void (*cb)(void)) {} 325 static inline void clear_hv_tscchange_cb(void) {} 326 static inline void hyperv_stop_tsc_emulation(void) {}; 327 static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) 328 { 329 return NULL; 330 } 331 static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } 332 static inline int hyperv_flush_guest_mapping_range(u64 as, 333 hyperv_fill_flush_list_func fill_func, void *data) 334 { 335 return -1; 336 } 337 static inline void hv_set_register(unsigned int reg, u64 value) { } 338 static inline u64 hv_get_register(unsigned int reg) { return 0; } 339 static inline void hv_set_non_nested_register(unsigned int reg, u64 value) { } 340 static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; } 341 #endif /* CONFIG_HYPERV */ 342 343 344 #ifdef CONFIG_HYPERV_VTL_MODE 345 void __init hv_vtl_init_platform(void); 346 #else 347 static inline void __init hv_vtl_init_platform(void) {} 348 #endif 349 350 #include <asm-generic/mshyperv.h> 351 352 #endif 353