1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_PARAVIRT_TYPES_H 3 #define _ASM_X86_PARAVIRT_TYPES_H 4 5 #ifndef __ASSEMBLY__ 6 /* These all sit in the .parainstructions section to tell us what to patch. */ 7 struct paravirt_patch_site { 8 u8 *instr; /* original instructions */ 9 u8 type; /* type of this instruction */ 10 u8 len; /* length of original instruction */ 11 }; 12 #endif 13 14 #ifdef CONFIG_PARAVIRT 15 16 #ifndef __ASSEMBLY__ 17 18 #include <asm/desc_defs.h> 19 #include <asm/pgtable_types.h> 20 #include <asm/nospec-branch.h> 21 22 struct page; 23 struct thread_struct; 24 struct desc_ptr; 25 struct tss_struct; 26 struct mm_struct; 27 struct desc_struct; 28 struct task_struct; 29 struct cpumask; 30 struct flush_tlb_info; 31 struct mmu_gather; 32 struct vm_area_struct; 33 34 /* 35 * Wrapper type for pointers to code which uses the non-standard 36 * calling convention. See PV_CALL_SAVE_REGS_THUNK below. 37 */ 38 struct paravirt_callee_save { 39 void *func; 40 }; 41 42 /* general info */ 43 struct pv_info { 44 #ifdef CONFIG_PARAVIRT_XXL 45 u16 extra_user_64bit_cs; /* __USER_CS if none */ 46 #endif 47 48 const char *name; 49 }; 50 51 #ifdef CONFIG_PARAVIRT_XXL 52 struct pv_lazy_ops { 53 /* Set deferred update mode, used for batching operations. */ 54 void (*enter)(void); 55 void (*leave)(void); 56 void (*flush)(void); 57 } __no_randomize_layout; 58 #endif 59 60 struct pv_cpu_ops { 61 /* hooks for various privileged instructions */ 62 void (*io_delay)(void); 63 64 #ifdef CONFIG_PARAVIRT_XXL 65 unsigned long (*get_debugreg)(int regno); 66 void (*set_debugreg)(int regno, unsigned long value); 67 68 unsigned long (*read_cr0)(void); 69 void (*write_cr0)(unsigned long); 70 71 void (*write_cr4)(unsigned long); 72 73 /* Segment descriptor handling */ 74 void (*load_tr_desc)(void); 75 void (*load_gdt)(const struct desc_ptr *); 76 void (*load_idt)(const struct desc_ptr *); 77 void (*set_ldt)(const void *desc, unsigned entries); 78 unsigned long (*store_tr)(void); 79 void (*load_tls)(struct thread_struct *t, unsigned int cpu); 80 void (*load_gs_index)(unsigned int idx); 81 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, 82 const void *desc); 83 void (*write_gdt_entry)(struct desc_struct *, 84 int entrynum, const void *desc, int size); 85 void (*write_idt_entry)(gate_desc *, 86 int entrynum, const gate_desc *gate); 87 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); 88 void (*free_ldt)(struct desc_struct *ldt, unsigned entries); 89 90 void (*load_sp0)(unsigned long sp0); 91 92 #ifdef CONFIG_X86_IOPL_IOPERM 93 void (*invalidate_io_bitmap)(void); 94 void (*update_io_bitmap)(void); 95 #endif 96 97 void (*wbinvd)(void); 98 99 /* cpuid emulation, mostly so that caps bits can be disabled */ 100 void (*cpuid)(unsigned int *eax, unsigned int *ebx, 101 unsigned int *ecx, unsigned int *edx); 102 103 /* Unsafe MSR operations. These will warn or panic on failure. */ 104 u64 (*read_msr)(unsigned int msr); 105 void (*write_msr)(unsigned int msr, unsigned low, unsigned high); 106 107 /* 108 * Safe MSR operations. 109 * read sets err to 0 or -EIO. write returns 0 or -EIO. 110 */ 111 u64 (*read_msr_safe)(unsigned int msr, int *err); 112 int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high); 113 114 u64 (*read_pmc)(int counter); 115 116 void (*start_context_switch)(struct task_struct *prev); 117 void (*end_context_switch)(struct task_struct *next); 118 #endif 119 } __no_randomize_layout; 120 121 struct pv_irq_ops { 122 #ifdef CONFIG_PARAVIRT_XXL 123 /* 124 * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF; 125 * all other bits returned from save_fl are undefined. 126 * 127 * NOTE: These functions callers expect the callee to preserve 128 * more registers than the standard C calling convention. 129 */ 130 struct paravirt_callee_save save_fl; 131 struct paravirt_callee_save irq_disable; 132 struct paravirt_callee_save irq_enable; 133 #endif 134 void (*safe_halt)(void); 135 void (*halt)(void); 136 } __no_randomize_layout; 137 138 struct pv_mmu_ops { 139 /* TLB operations */ 140 void (*flush_tlb_user)(void); 141 void (*flush_tlb_kernel)(void); 142 void (*flush_tlb_one_user)(unsigned long addr); 143 void (*flush_tlb_multi)(const struct cpumask *cpus, 144 const struct flush_tlb_info *info); 145 146 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); 147 148 /* Hook for intercepting the destruction of an mm_struct. */ 149 void (*exit_mmap)(struct mm_struct *mm); 150 void (*notify_page_enc_status_changed)(unsigned long pfn, int npages, bool enc); 151 152 #ifdef CONFIG_PARAVIRT_XXL 153 struct paravirt_callee_save read_cr2; 154 void (*write_cr2)(unsigned long); 155 156 unsigned long (*read_cr3)(void); 157 void (*write_cr3)(unsigned long); 158 159 /* Hook for intercepting the creation/use of an mm_struct. */ 160 void (*enter_mmap)(struct mm_struct *mm); 161 162 /* Hooks for allocating and freeing a pagetable top-level */ 163 int (*pgd_alloc)(struct mm_struct *mm); 164 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 165 166 /* 167 * Hooks for allocating/releasing pagetable pages when they're 168 * attached to a pagetable 169 */ 170 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 171 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 172 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 173 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); 174 void (*release_pte)(unsigned long pfn); 175 void (*release_pmd)(unsigned long pfn); 176 void (*release_pud)(unsigned long pfn); 177 void (*release_p4d)(unsigned long pfn); 178 179 /* Pagetable manipulation functions */ 180 void (*set_pte)(pte_t *ptep, pte_t pteval); 181 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 182 183 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, 184 pte_t *ptep); 185 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, 186 pte_t *ptep, pte_t pte); 187 188 struct paravirt_callee_save pte_val; 189 struct paravirt_callee_save make_pte; 190 191 struct paravirt_callee_save pgd_val; 192 struct paravirt_callee_save make_pgd; 193 194 void (*set_pud)(pud_t *pudp, pud_t pudval); 195 196 struct paravirt_callee_save pmd_val; 197 struct paravirt_callee_save make_pmd; 198 199 struct paravirt_callee_save pud_val; 200 struct paravirt_callee_save make_pud; 201 202 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); 203 204 #if CONFIG_PGTABLE_LEVELS >= 5 205 struct paravirt_callee_save p4d_val; 206 struct paravirt_callee_save make_p4d; 207 208 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); 209 #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 210 211 struct pv_lazy_ops lazy_mode; 212 213 /* dom0 ops */ 214 215 /* Sometimes the physical address is a pfn, and sometimes its 216 an mfn. We can tell which is which from the index. */ 217 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 218 phys_addr_t phys, pgprot_t flags); 219 #endif 220 } __no_randomize_layout; 221 222 struct arch_spinlock; 223 #ifdef CONFIG_SMP 224 #include <asm/spinlock_types.h> 225 #endif 226 227 struct qspinlock; 228 229 struct pv_lock_ops { 230 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val); 231 struct paravirt_callee_save queued_spin_unlock; 232 233 void (*wait)(u8 *ptr, u8 val); 234 void (*kick)(int cpu); 235 236 struct paravirt_callee_save vcpu_is_preempted; 237 } __no_randomize_layout; 238 239 /* This contains all the paravirt structures: we get a convenient 240 * number for each function using the offset which we use to indicate 241 * what to patch. */ 242 struct paravirt_patch_template { 243 struct pv_cpu_ops cpu; 244 struct pv_irq_ops irq; 245 struct pv_mmu_ops mmu; 246 struct pv_lock_ops lock; 247 } __no_randomize_layout; 248 249 extern struct pv_info pv_info; 250 extern struct paravirt_patch_template pv_ops; 251 252 #define PARAVIRT_PATCH(x) \ 253 (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 254 255 #define paravirt_type(op) \ 256 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 257 [paravirt_opptr] "m" (pv_ops.op) 258 /* 259 * Generate some code, and mark it as patchable by the 260 * apply_paravirt() alternate instruction patcher. 261 */ 262 #define _paravirt_alt(insn_string, type) \ 263 "771:\n\t" insn_string "\n" "772:\n" \ 264 ".pushsection .parainstructions,\"a\"\n" \ 265 _ASM_ALIGN "\n" \ 266 _ASM_PTR " 771b\n" \ 267 " .byte " type "\n" \ 268 " .byte 772b-771b\n" \ 269 _ASM_ALIGN "\n" \ 270 ".popsection\n" 271 272 /* Generate patchable code, with the default asm parameters. */ 273 #define paravirt_alt(insn_string) \ 274 _paravirt_alt(insn_string, "%c[paravirt_typenum]") 275 276 /* Simple instruction patching code. */ 277 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" 278 279 unsigned int paravirt_patch(u8 type, void *insn_buff, unsigned long addr, unsigned int len); 280 281 int paravirt_disable_iospace(void); 282 283 /* 284 * This generates an indirect call based on the operation type number. 285 * The type number, computed in PARAVIRT_PATCH, is derived from the 286 * offset into the paravirt_patch_template structure, and can therefore be 287 * freely converted back into a structure offset. 288 */ 289 #define PARAVIRT_CALL \ 290 ANNOTATE_RETPOLINE_SAFE \ 291 "call *%[paravirt_opptr];" 292 293 /* 294 * These macros are intended to wrap calls through one of the paravirt 295 * ops structs, so that they can be later identified and patched at 296 * runtime. 297 * 298 * Normally, a call to a pv_op function is a simple indirect call: 299 * (pv_op_struct.operations)(args...). 300 * 301 * Unfortunately, this is a relatively slow operation for modern CPUs, 302 * because it cannot necessarily determine what the destination 303 * address is. In this case, the address is a runtime constant, so at 304 * the very least we can patch the call to a simple direct call, or, 305 * ideally, patch an inline implementation into the callsite. (Direct 306 * calls are essentially free, because the call and return addresses 307 * are completely predictable.) 308 * 309 * For i386, these macros rely on the standard gcc "regparm(3)" calling 310 * convention, in which the first three arguments are placed in %eax, 311 * %edx, %ecx (in that order), and the remaining arguments are placed 312 * on the stack. All caller-save registers (eax,edx,ecx) are expected 313 * to be modified (either clobbered or used for return values). 314 * X86_64, on the other hand, already specifies a register-based calling 315 * conventions, returning at %rax, with parameters going in %rdi, %rsi, 316 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 317 * special handling for dealing with 4 arguments, unlike i386. 318 * However, x86_64 also has to clobber all caller saved registers, which 319 * unfortunately, are quite a bit (r8 - r11) 320 * 321 * The call instruction itself is marked by placing its start address 322 * and size into the .parainstructions section, so that 323 * apply_paravirt() in arch/i386/kernel/alternative.c can do the 324 * appropriate patching under the control of the backend pv_init_ops 325 * implementation. 326 * 327 * Unfortunately there's no way to get gcc to generate the args setup 328 * for the call, and then allow the call itself to be generated by an 329 * inline asm. Because of this, we must do the complete arg setup and 330 * return value handling from within these macros. This is fairly 331 * cumbersome. 332 * 333 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 334 * It could be extended to more arguments, but there would be little 335 * to be gained from that. For each number of arguments, there are 336 * two VCALL and CALL variants for void and non-void functions. 337 * 338 * When there is a return value, the invoker of the macro must specify 339 * the return type. The macro then uses sizeof() on that type to 340 * determine whether it's a 32 or 64 bit value and places the return 341 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 342 * 64-bit). For x86_64 machines, it just returns in %rax regardless of 343 * the return value size. 344 * 345 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments; 346 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 347 * in low,high order 348 * 349 * Small structures are passed and returned in registers. The macro 350 * calling convention can't directly deal with this, so the wrapper 351 * functions must do it. 352 * 353 * These PVOP_* macros are only defined within this header. This 354 * means that all uses must be wrapped in inline functions. This also 355 * makes sure the incoming and outgoing types are always correct. 356 */ 357 #ifdef CONFIG_X86_32 358 #define PVOP_CALL_ARGS \ 359 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; 360 361 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 362 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 363 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 364 365 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 366 "=c" (__ecx) 367 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 368 369 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 370 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 371 372 #define EXTRA_CLOBBERS 373 #define VEXTRA_CLOBBERS 374 #else /* CONFIG_X86_64 */ 375 /* [re]ax isn't an arg, but the return val */ 376 #define PVOP_CALL_ARGS \ 377 unsigned long __edi = __edi, __esi = __esi, \ 378 __edx = __edx, __ecx = __ecx, __eax = __eax; 379 380 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 381 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 382 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 383 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 384 385 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 386 "=S" (__esi), "=d" (__edx), \ 387 "=c" (__ecx) 388 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 389 390 /* 391 * void functions are still allowed [re]ax for scratch. 392 * 393 * The ZERO_CALL_USED REGS feature may end up zeroing out callee-saved 394 * registers. Make sure we model this with the appropriate clobbers. 395 */ 396 #ifdef CONFIG_ZERO_CALL_USED_REGS 397 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), PVOP_VCALL_CLOBBERS 398 #else 399 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 400 #endif 401 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 402 403 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 404 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 405 #endif /* CONFIG_X86_32 */ 406 407 #ifdef CONFIG_PARAVIRT_DEBUG 408 #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) 409 #else 410 #define PVOP_TEST_NULL(op) ((void)pv_ops.op) 411 #endif 412 413 #define PVOP_RETVAL(rettype) \ 414 ({ unsigned long __mask = ~0UL; \ 415 BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \ 416 switch (sizeof(rettype)) { \ 417 case 1: __mask = 0xffUL; break; \ 418 case 2: __mask = 0xffffUL; break; \ 419 case 4: __mask = 0xffffffffUL; break; \ 420 default: break; \ 421 } \ 422 __mask & __eax; \ 423 }) 424 425 426 #define ____PVOP_CALL(ret, op, call_clbr, extra_clbr, ...) \ 427 ({ \ 428 PVOP_CALL_ARGS; \ 429 PVOP_TEST_NULL(op); \ 430 asm volatile(paravirt_alt(PARAVIRT_CALL) \ 431 : call_clbr, ASM_CALL_CONSTRAINT \ 432 : paravirt_type(op), \ 433 ##__VA_ARGS__ \ 434 : "memory", "cc" extra_clbr); \ 435 ret; \ 436 }) 437 438 #define ____PVOP_ALT_CALL(ret, op, alt, cond, call_clbr, \ 439 extra_clbr, ...) \ 440 ({ \ 441 PVOP_CALL_ARGS; \ 442 PVOP_TEST_NULL(op); \ 443 asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \ 444 alt, cond) \ 445 : call_clbr, ASM_CALL_CONSTRAINT \ 446 : paravirt_type(op), \ 447 ##__VA_ARGS__ \ 448 : "memory", "cc" extra_clbr); \ 449 ret; \ 450 }) 451 452 #define __PVOP_CALL(rettype, op, ...) \ 453 ____PVOP_CALL(PVOP_RETVAL(rettype), op, \ 454 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__) 455 456 #define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \ 457 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, \ 458 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \ 459 ##__VA_ARGS__) 460 461 #define __PVOP_CALLEESAVE(rettype, op, ...) \ 462 ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, \ 463 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 464 465 #define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \ 466 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \ 467 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 468 469 470 #define __PVOP_VCALL(op, ...) \ 471 (void)____PVOP_CALL(, op, PVOP_VCALL_CLOBBERS, \ 472 VEXTRA_CLOBBERS, ##__VA_ARGS__) 473 474 #define __PVOP_ALT_VCALL(op, alt, cond, ...) \ 475 (void)____PVOP_ALT_CALL(, op, alt, cond, \ 476 PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \ 477 ##__VA_ARGS__) 478 479 #define __PVOP_VCALLEESAVE(op, ...) \ 480 (void)____PVOP_CALL(, op.func, \ 481 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 482 483 #define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \ 484 (void)____PVOP_ALT_CALL(, op.func, alt, cond, \ 485 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 486 487 488 #define PVOP_CALL0(rettype, op) \ 489 __PVOP_CALL(rettype, op) 490 #define PVOP_VCALL0(op) \ 491 __PVOP_VCALL(op) 492 #define PVOP_ALT_CALL0(rettype, op, alt, cond) \ 493 __PVOP_ALT_CALL(rettype, op, alt, cond) 494 #define PVOP_ALT_VCALL0(op, alt, cond) \ 495 __PVOP_ALT_VCALL(op, alt, cond) 496 497 #define PVOP_CALLEE0(rettype, op) \ 498 __PVOP_CALLEESAVE(rettype, op) 499 #define PVOP_VCALLEE0(op) \ 500 __PVOP_VCALLEESAVE(op) 501 #define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \ 502 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond) 503 #define PVOP_ALT_VCALLEE0(op, alt, cond) \ 504 __PVOP_ALT_VCALLEESAVE(op, alt, cond) 505 506 507 #define PVOP_CALL1(rettype, op, arg1) \ 508 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1)) 509 #define PVOP_VCALL1(op, arg1) \ 510 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) 511 #define PVOP_ALT_VCALL1(op, arg1, alt, cond) \ 512 __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1)) 513 514 #define PVOP_CALLEE1(rettype, op, arg1) \ 515 __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1)) 516 #define PVOP_VCALLEE1(op, arg1) \ 517 __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1)) 518 #define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \ 519 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1)) 520 #define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \ 521 __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1)) 522 523 524 #define PVOP_CALL2(rettype, op, arg1, arg2) \ 525 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 526 #define PVOP_VCALL2(op, arg1, arg2) \ 527 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 528 529 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 530 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \ 531 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 532 #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 533 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \ 534 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 535 536 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 537 __PVOP_CALL(rettype, op, \ 538 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 539 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 540 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 541 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 542 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 543 544 void _paravirt_nop(void); 545 void paravirt_BUG(void); 546 unsigned long paravirt_ret0(void); 547 #ifdef CONFIG_PARAVIRT_XXL 548 u64 _paravirt_ident_64(u64); 549 unsigned long pv_native_save_fl(void); 550 void pv_native_irq_disable(void); 551 void pv_native_irq_enable(void); 552 unsigned long pv_native_read_cr2(void); 553 #endif 554 555 #define paravirt_nop ((void *)_paravirt_nop) 556 557 extern struct paravirt_patch_site __parainstructions[], 558 __parainstructions_end[]; 559 560 #endif /* __ASSEMBLY__ */ 561 #endif /* CONFIG_PARAVIRT */ 562 #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 563