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; 133 134 void (*safe_halt)(void); 135 void (*halt)(void); 136 #endif 137 } __no_randomize_layout; 138 139 struct pv_mmu_ops { 140 /* TLB operations */ 141 void (*flush_tlb_user)(void); 142 void (*flush_tlb_kernel)(void); 143 void (*flush_tlb_one_user)(unsigned long addr); 144 void (*flush_tlb_multi)(const struct cpumask *cpus, 145 const struct flush_tlb_info *info); 146 147 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); 148 149 /* Hook for intercepting the destruction of an mm_struct. */ 150 void (*exit_mmap)(struct mm_struct *mm); 151 void (*notify_page_enc_status_changed)(unsigned long pfn, int npages, bool enc); 152 153 #ifdef CONFIG_PARAVIRT_XXL 154 struct paravirt_callee_save read_cr2; 155 void (*write_cr2)(unsigned long); 156 157 unsigned long (*read_cr3)(void); 158 void (*write_cr3)(unsigned long); 159 160 /* Hook for intercepting the creation/use of an mm_struct. */ 161 void (*enter_mmap)(struct mm_struct *mm); 162 163 /* Hooks for allocating and freeing a pagetable top-level */ 164 int (*pgd_alloc)(struct mm_struct *mm); 165 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 166 167 /* 168 * Hooks for allocating/releasing pagetable pages when they're 169 * attached to a pagetable 170 */ 171 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 172 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 173 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 174 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); 175 void (*release_pte)(unsigned long pfn); 176 void (*release_pmd)(unsigned long pfn); 177 void (*release_pud)(unsigned long pfn); 178 void (*release_p4d)(unsigned long pfn); 179 180 /* Pagetable manipulation functions */ 181 void (*set_pte)(pte_t *ptep, pte_t pteval); 182 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 183 184 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, 185 pte_t *ptep); 186 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, 187 pte_t *ptep, pte_t pte); 188 189 struct paravirt_callee_save pte_val; 190 struct paravirt_callee_save make_pte; 191 192 struct paravirt_callee_save pgd_val; 193 struct paravirt_callee_save make_pgd; 194 195 void (*set_pud)(pud_t *pudp, pud_t pudval); 196 197 struct paravirt_callee_save pmd_val; 198 struct paravirt_callee_save make_pmd; 199 200 struct paravirt_callee_save pud_val; 201 struct paravirt_callee_save make_pud; 202 203 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); 204 205 #if CONFIG_PGTABLE_LEVELS >= 5 206 struct paravirt_callee_save p4d_val; 207 struct paravirt_callee_save make_p4d; 208 209 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); 210 #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 211 212 struct pv_lazy_ops lazy_mode; 213 214 /* dom0 ops */ 215 216 /* Sometimes the physical address is a pfn, and sometimes its 217 an mfn. We can tell which is which from the index. */ 218 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 219 phys_addr_t phys, pgprot_t flags); 220 #endif 221 } __no_randomize_layout; 222 223 struct arch_spinlock; 224 #ifdef CONFIG_SMP 225 #include <asm/spinlock_types.h> 226 #endif 227 228 struct qspinlock; 229 230 struct pv_lock_ops { 231 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val); 232 struct paravirt_callee_save queued_spin_unlock; 233 234 void (*wait)(u8 *ptr, u8 val); 235 void (*kick)(int cpu); 236 237 struct paravirt_callee_save vcpu_is_preempted; 238 } __no_randomize_layout; 239 240 /* This contains all the paravirt structures: we get a convenient 241 * number for each function using the offset which we use to indicate 242 * what to patch. */ 243 struct paravirt_patch_template { 244 struct pv_cpu_ops cpu; 245 struct pv_irq_ops irq; 246 struct pv_mmu_ops mmu; 247 struct pv_lock_ops lock; 248 } __no_randomize_layout; 249 250 extern struct pv_info pv_info; 251 extern struct paravirt_patch_template pv_ops; 252 253 #define PARAVIRT_PATCH(x) \ 254 (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 255 256 #define paravirt_type(op) \ 257 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 258 [paravirt_opptr] "m" (pv_ops.op) 259 /* 260 * Generate some code, and mark it as patchable by the 261 * apply_paravirt() alternate instruction patcher. 262 */ 263 #define _paravirt_alt(insn_string, type) \ 264 "771:\n\t" insn_string "\n" "772:\n" \ 265 ".pushsection .parainstructions,\"a\"\n" \ 266 _ASM_ALIGN "\n" \ 267 _ASM_PTR " 771b\n" \ 268 " .byte " type "\n" \ 269 " .byte 772b-771b\n" \ 270 _ASM_ALIGN "\n" \ 271 ".popsection\n" 272 273 /* Generate patchable code, with the default asm parameters. */ 274 #define paravirt_alt(insn_string) \ 275 _paravirt_alt(insn_string, "%c[paravirt_typenum]") 276 277 /* Simple instruction patching code. */ 278 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" 279 280 unsigned int paravirt_patch(u8 type, void *insn_buff, unsigned long addr, unsigned int len); 281 282 int paravirt_disable_iospace(void); 283 284 /* 285 * This generates an indirect call based on the operation type number. 286 * The type number, computed in PARAVIRT_PATCH, is derived from the 287 * offset into the paravirt_patch_template structure, and can therefore be 288 * freely converted back into a structure offset. 289 */ 290 #define PARAVIRT_CALL \ 291 ANNOTATE_RETPOLINE_SAFE \ 292 "call *%[paravirt_opptr];" 293 294 /* 295 * These macros are intended to wrap calls through one of the paravirt 296 * ops structs, so that they can be later identified and patched at 297 * runtime. 298 * 299 * Normally, a call to a pv_op function is a simple indirect call: 300 * (pv_op_struct.operations)(args...). 301 * 302 * Unfortunately, this is a relatively slow operation for modern CPUs, 303 * because it cannot necessarily determine what the destination 304 * address is. In this case, the address is a runtime constant, so at 305 * the very least we can patch the call to a simple direct call, or, 306 * ideally, patch an inline implementation into the callsite. (Direct 307 * calls are essentially free, because the call and return addresses 308 * are completely predictable.) 309 * 310 * For i386, these macros rely on the standard gcc "regparm(3)" calling 311 * convention, in which the first three arguments are placed in %eax, 312 * %edx, %ecx (in that order), and the remaining arguments are placed 313 * on the stack. All caller-save registers (eax,edx,ecx) are expected 314 * to be modified (either clobbered or used for return values). 315 * X86_64, on the other hand, already specifies a register-based calling 316 * conventions, returning at %rax, with parameters going in %rdi, %rsi, 317 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 318 * special handling for dealing with 4 arguments, unlike i386. 319 * However, x86_64 also has to clobber all caller saved registers, which 320 * unfortunately, are quite a bit (r8 - r11) 321 * 322 * The call instruction itself is marked by placing its start address 323 * and size into the .parainstructions section, so that 324 * apply_paravirt() in arch/i386/kernel/alternative.c can do the 325 * appropriate patching under the control of the backend pv_init_ops 326 * implementation. 327 * 328 * Unfortunately there's no way to get gcc to generate the args setup 329 * for the call, and then allow the call itself to be generated by an 330 * inline asm. Because of this, we must do the complete arg setup and 331 * return value handling from within these macros. This is fairly 332 * cumbersome. 333 * 334 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 335 * It could be extended to more arguments, but there would be little 336 * to be gained from that. For each number of arguments, there are 337 * two VCALL and CALL variants for void and non-void functions. 338 * 339 * When there is a return value, the invoker of the macro must specify 340 * the return type. The macro then uses sizeof() on that type to 341 * determine whether it's a 32 or 64 bit value and places the return 342 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 343 * 64-bit). For x86_64 machines, it just returns in %rax regardless of 344 * the return value size. 345 * 346 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments; 347 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 348 * in low,high order 349 * 350 * Small structures are passed and returned in registers. The macro 351 * calling convention can't directly deal with this, so the wrapper 352 * functions must do it. 353 * 354 * These PVOP_* macros are only defined within this header. This 355 * means that all uses must be wrapped in inline functions. This also 356 * makes sure the incoming and outgoing types are always correct. 357 */ 358 #ifdef CONFIG_X86_32 359 #define PVOP_CALL_ARGS \ 360 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; 361 362 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 363 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 364 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 365 366 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 367 "=c" (__ecx) 368 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 369 370 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 371 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 372 373 #define EXTRA_CLOBBERS 374 #define VEXTRA_CLOBBERS 375 #else /* CONFIG_X86_64 */ 376 /* [re]ax isn't an arg, but the return val */ 377 #define PVOP_CALL_ARGS \ 378 unsigned long __edi = __edi, __esi = __esi, \ 379 __edx = __edx, __ecx = __ecx, __eax = __eax; 380 381 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 382 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 383 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 384 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 385 386 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 387 "=S" (__esi), "=d" (__edx), \ 388 "=c" (__ecx) 389 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 390 391 /* 392 * void functions are still allowed [re]ax for scratch. 393 * 394 * The ZERO_CALL_USED REGS feature may end up zeroing out callee-saved 395 * registers. Make sure we model this with the appropriate clobbers. 396 */ 397 #ifdef CONFIG_ZERO_CALL_USED_REGS 398 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), PVOP_VCALL_CLOBBERS 399 #else 400 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 401 #endif 402 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 403 404 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 405 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 406 #endif /* CONFIG_X86_32 */ 407 408 #ifdef CONFIG_PARAVIRT_DEBUG 409 #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) 410 #else 411 #define PVOP_TEST_NULL(op) ((void)pv_ops.op) 412 #endif 413 414 #define PVOP_RETVAL(rettype) \ 415 ({ unsigned long __mask = ~0UL; \ 416 BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \ 417 switch (sizeof(rettype)) { \ 418 case 1: __mask = 0xffUL; break; \ 419 case 2: __mask = 0xffffUL; break; \ 420 case 4: __mask = 0xffffffffUL; break; \ 421 default: break; \ 422 } \ 423 __mask & __eax; \ 424 }) 425 426 427 #define ____PVOP_CALL(ret, op, call_clbr, extra_clbr, ...) \ 428 ({ \ 429 PVOP_CALL_ARGS; \ 430 PVOP_TEST_NULL(op); \ 431 asm volatile(paravirt_alt(PARAVIRT_CALL) \ 432 : call_clbr, ASM_CALL_CONSTRAINT \ 433 : paravirt_type(op), \ 434 ##__VA_ARGS__ \ 435 : "memory", "cc" extra_clbr); \ 436 ret; \ 437 }) 438 439 #define ____PVOP_ALT_CALL(ret, op, alt, cond, call_clbr, \ 440 extra_clbr, ...) \ 441 ({ \ 442 PVOP_CALL_ARGS; \ 443 PVOP_TEST_NULL(op); \ 444 asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \ 445 alt, cond) \ 446 : call_clbr, ASM_CALL_CONSTRAINT \ 447 : paravirt_type(op), \ 448 ##__VA_ARGS__ \ 449 : "memory", "cc" extra_clbr); \ 450 ret; \ 451 }) 452 453 #define __PVOP_CALL(rettype, op, ...) \ 454 ____PVOP_CALL(PVOP_RETVAL(rettype), op, \ 455 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__) 456 457 #define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \ 458 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, \ 459 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \ 460 ##__VA_ARGS__) 461 462 #define __PVOP_CALLEESAVE(rettype, op, ...) \ 463 ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, \ 464 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 465 466 #define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \ 467 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \ 468 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 469 470 471 #define __PVOP_VCALL(op, ...) \ 472 (void)____PVOP_CALL(, op, PVOP_VCALL_CLOBBERS, \ 473 VEXTRA_CLOBBERS, ##__VA_ARGS__) 474 475 #define __PVOP_ALT_VCALL(op, alt, cond, ...) \ 476 (void)____PVOP_ALT_CALL(, op, alt, cond, \ 477 PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \ 478 ##__VA_ARGS__) 479 480 #define __PVOP_VCALLEESAVE(op, ...) \ 481 (void)____PVOP_CALL(, op.func, \ 482 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 483 484 #define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \ 485 (void)____PVOP_ALT_CALL(, op.func, alt, cond, \ 486 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 487 488 489 #define PVOP_CALL0(rettype, op) \ 490 __PVOP_CALL(rettype, op) 491 #define PVOP_VCALL0(op) \ 492 __PVOP_VCALL(op) 493 #define PVOP_ALT_CALL0(rettype, op, alt, cond) \ 494 __PVOP_ALT_CALL(rettype, op, alt, cond) 495 #define PVOP_ALT_VCALL0(op, alt, cond) \ 496 __PVOP_ALT_VCALL(op, alt, cond) 497 498 #define PVOP_CALLEE0(rettype, op) \ 499 __PVOP_CALLEESAVE(rettype, op) 500 #define PVOP_VCALLEE0(op) \ 501 __PVOP_VCALLEESAVE(op) 502 #define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \ 503 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond) 504 #define PVOP_ALT_VCALLEE0(op, alt, cond) \ 505 __PVOP_ALT_VCALLEESAVE(op, alt, cond) 506 507 508 #define PVOP_CALL1(rettype, op, arg1) \ 509 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1)) 510 #define PVOP_VCALL1(op, arg1) \ 511 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) 512 #define PVOP_ALT_VCALL1(op, arg1, alt, cond) \ 513 __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1)) 514 515 #define PVOP_CALLEE1(rettype, op, arg1) \ 516 __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1)) 517 #define PVOP_VCALLEE1(op, arg1) \ 518 __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1)) 519 #define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \ 520 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1)) 521 #define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \ 522 __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1)) 523 524 525 #define PVOP_CALL2(rettype, op, arg1, arg2) \ 526 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 527 #define PVOP_VCALL2(op, arg1, arg2) \ 528 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 529 530 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 531 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \ 532 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 533 #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 534 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \ 535 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 536 537 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 538 __PVOP_CALL(rettype, op, \ 539 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 540 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 541 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 542 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 543 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 544 545 void _paravirt_nop(void); 546 void paravirt_BUG(void); 547 unsigned long paravirt_ret0(void); 548 #ifdef CONFIG_PARAVIRT_XXL 549 u64 _paravirt_ident_64(u64); 550 unsigned long pv_native_save_fl(void); 551 void pv_native_irq_disable(void); 552 void pv_native_irq_enable(void); 553 unsigned long pv_native_read_cr2(void); 554 #endif 555 556 #define paravirt_nop ((void *)_paravirt_nop) 557 558 extern struct paravirt_patch_site __parainstructions[], 559 __parainstructions_end[]; 560 561 #endif /* __ASSEMBLY__ */ 562 #endif /* CONFIG_PARAVIRT */ 563 #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 564