1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_PARAVIRT_TYPES_H 3 #define _ASM_X86_PARAVIRT_TYPES_H 4 5 /* Bitmask of what can be clobbered: usually at least eax. */ 6 #define CLBR_EAX (1 << 0) 7 #define CLBR_ECX (1 << 1) 8 #define CLBR_EDX (1 << 2) 9 #define CLBR_EDI (1 << 3) 10 11 #ifdef CONFIG_X86_32 12 /* CLBR_ANY should match all regs platform has. For i386, that's just it */ 13 #define CLBR_ANY ((1 << 4) - 1) 14 15 #define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX) 16 #define CLBR_RET_REG (CLBR_EAX | CLBR_EDX) 17 #else 18 #define CLBR_RAX CLBR_EAX 19 #define CLBR_RCX CLBR_ECX 20 #define CLBR_RDX CLBR_EDX 21 #define CLBR_RDI CLBR_EDI 22 #define CLBR_RSI (1 << 4) 23 #define CLBR_R8 (1 << 5) 24 #define CLBR_R9 (1 << 6) 25 #define CLBR_R10 (1 << 7) 26 #define CLBR_R11 (1 << 8) 27 28 #define CLBR_ANY ((1 << 9) - 1) 29 30 #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \ 31 CLBR_RCX | CLBR_R8 | CLBR_R9) 32 #define CLBR_RET_REG (CLBR_RAX) 33 34 #endif /* X86_64 */ 35 36 #ifndef __ASSEMBLY__ 37 38 #include <asm/desc_defs.h> 39 #include <asm/pgtable_types.h> 40 #include <asm/nospec-branch.h> 41 42 struct page; 43 struct thread_struct; 44 struct desc_ptr; 45 struct tss_struct; 46 struct mm_struct; 47 struct desc_struct; 48 struct task_struct; 49 struct cpumask; 50 struct flush_tlb_info; 51 struct mmu_gather; 52 struct vm_area_struct; 53 54 /* 55 * Wrapper type for pointers to code which uses the non-standard 56 * calling convention. See PV_CALL_SAVE_REGS_THUNK below. 57 */ 58 struct paravirt_callee_save { 59 void *func; 60 }; 61 62 /* general info */ 63 struct pv_info { 64 #ifdef CONFIG_PARAVIRT_XXL 65 u16 extra_user_64bit_cs; /* __USER_CS if none */ 66 #endif 67 68 const char *name; 69 }; 70 71 #ifdef CONFIG_PARAVIRT_XXL 72 struct pv_lazy_ops { 73 /* Set deferred update mode, used for batching operations. */ 74 void (*enter)(void); 75 void (*leave)(void); 76 void (*flush)(void); 77 } __no_randomize_layout; 78 #endif 79 80 struct pv_cpu_ops { 81 /* hooks for various privileged instructions */ 82 void (*io_delay)(void); 83 84 #ifdef CONFIG_PARAVIRT_XXL 85 unsigned long (*get_debugreg)(int regno); 86 void (*set_debugreg)(int regno, unsigned long value); 87 88 unsigned long (*read_cr0)(void); 89 void (*write_cr0)(unsigned long); 90 91 void (*write_cr4)(unsigned long); 92 93 /* Segment descriptor handling */ 94 void (*load_tr_desc)(void); 95 void (*load_gdt)(const struct desc_ptr *); 96 void (*load_idt)(const struct desc_ptr *); 97 void (*set_ldt)(const void *desc, unsigned entries); 98 unsigned long (*store_tr)(void); 99 void (*load_tls)(struct thread_struct *t, unsigned int cpu); 100 void (*load_gs_index)(unsigned int idx); 101 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, 102 const void *desc); 103 void (*write_gdt_entry)(struct desc_struct *, 104 int entrynum, const void *desc, int size); 105 void (*write_idt_entry)(gate_desc *, 106 int entrynum, const gate_desc *gate); 107 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); 108 void (*free_ldt)(struct desc_struct *ldt, unsigned entries); 109 110 void (*load_sp0)(unsigned long sp0); 111 112 #ifdef CONFIG_X86_IOPL_IOPERM 113 void (*invalidate_io_bitmap)(void); 114 void (*update_io_bitmap)(void); 115 #endif 116 117 void (*wbinvd)(void); 118 119 /* cpuid emulation, mostly so that caps bits can be disabled */ 120 void (*cpuid)(unsigned int *eax, unsigned int *ebx, 121 unsigned int *ecx, unsigned int *edx); 122 123 /* Unsafe MSR operations. These will warn or panic on failure. */ 124 u64 (*read_msr)(unsigned int msr); 125 void (*write_msr)(unsigned int msr, unsigned low, unsigned high); 126 127 /* 128 * Safe MSR operations. 129 * read sets err to 0 or -EIO. write returns 0 or -EIO. 130 */ 131 u64 (*read_msr_safe)(unsigned int msr, int *err); 132 int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high); 133 134 u64 (*read_pmc)(int counter); 135 136 void (*start_context_switch)(struct task_struct *prev); 137 void (*end_context_switch)(struct task_struct *next); 138 #endif 139 } __no_randomize_layout; 140 141 struct pv_irq_ops { 142 #ifdef CONFIG_PARAVIRT_XXL 143 /* 144 * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF; 145 * all other bits returned from save_fl are undefined. 146 * 147 * NOTE: These functions callers expect the callee to preserve 148 * more registers than the standard C calling convention. 149 */ 150 struct paravirt_callee_save save_fl; 151 struct paravirt_callee_save irq_disable; 152 struct paravirt_callee_save irq_enable; 153 154 void (*safe_halt)(void); 155 void (*halt)(void); 156 #endif 157 } __no_randomize_layout; 158 159 struct pv_mmu_ops { 160 /* TLB operations */ 161 void (*flush_tlb_user)(void); 162 void (*flush_tlb_kernel)(void); 163 void (*flush_tlb_one_user)(unsigned long addr); 164 void (*flush_tlb_multi)(const struct cpumask *cpus, 165 const struct flush_tlb_info *info); 166 167 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); 168 169 /* Hook for intercepting the destruction of an mm_struct. */ 170 void (*exit_mmap)(struct mm_struct *mm); 171 172 #ifdef CONFIG_PARAVIRT_XXL 173 struct paravirt_callee_save read_cr2; 174 void (*write_cr2)(unsigned long); 175 176 unsigned long (*read_cr3)(void); 177 void (*write_cr3)(unsigned long); 178 179 /* Hooks for intercepting the creation/use of an mm_struct. */ 180 void (*activate_mm)(struct mm_struct *prev, 181 struct mm_struct *next); 182 void (*dup_mmap)(struct mm_struct *oldmm, 183 struct mm_struct *mm); 184 185 /* Hooks for allocating and freeing a pagetable top-level */ 186 int (*pgd_alloc)(struct mm_struct *mm); 187 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 188 189 /* 190 * Hooks for allocating/releasing pagetable pages when they're 191 * attached to a pagetable 192 */ 193 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 194 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 195 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 196 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); 197 void (*release_pte)(unsigned long pfn); 198 void (*release_pmd)(unsigned long pfn); 199 void (*release_pud)(unsigned long pfn); 200 void (*release_p4d)(unsigned long pfn); 201 202 /* Pagetable manipulation functions */ 203 void (*set_pte)(pte_t *ptep, pte_t pteval); 204 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 205 206 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, 207 pte_t *ptep); 208 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, 209 pte_t *ptep, pte_t pte); 210 211 struct paravirt_callee_save pte_val; 212 struct paravirt_callee_save make_pte; 213 214 struct paravirt_callee_save pgd_val; 215 struct paravirt_callee_save make_pgd; 216 217 void (*set_pud)(pud_t *pudp, pud_t pudval); 218 219 struct paravirt_callee_save pmd_val; 220 struct paravirt_callee_save make_pmd; 221 222 struct paravirt_callee_save pud_val; 223 struct paravirt_callee_save make_pud; 224 225 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); 226 227 #if CONFIG_PGTABLE_LEVELS >= 5 228 struct paravirt_callee_save p4d_val; 229 struct paravirt_callee_save make_p4d; 230 231 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); 232 #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 233 234 struct pv_lazy_ops lazy_mode; 235 236 /* dom0 ops */ 237 238 /* Sometimes the physical address is a pfn, and sometimes its 239 an mfn. We can tell which is which from the index. */ 240 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 241 phys_addr_t phys, pgprot_t flags); 242 #endif 243 } __no_randomize_layout; 244 245 struct arch_spinlock; 246 #ifdef CONFIG_SMP 247 #include <asm/spinlock_types.h> 248 #endif 249 250 struct qspinlock; 251 252 struct pv_lock_ops { 253 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val); 254 struct paravirt_callee_save queued_spin_unlock; 255 256 void (*wait)(u8 *ptr, u8 val); 257 void (*kick)(int cpu); 258 259 struct paravirt_callee_save vcpu_is_preempted; 260 } __no_randomize_layout; 261 262 /* This contains all the paravirt structures: we get a convenient 263 * number for each function using the offset which we use to indicate 264 * what to patch. */ 265 struct paravirt_patch_template { 266 struct pv_cpu_ops cpu; 267 struct pv_irq_ops irq; 268 struct pv_mmu_ops mmu; 269 struct pv_lock_ops lock; 270 } __no_randomize_layout; 271 272 extern struct pv_info pv_info; 273 extern struct paravirt_patch_template pv_ops; 274 extern void (*paravirt_iret)(void); 275 276 #define PARAVIRT_PATCH(x) \ 277 (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 278 279 #define paravirt_type(op) \ 280 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 281 [paravirt_opptr] "i" (&(pv_ops.op)) 282 #define paravirt_clobber(clobber) \ 283 [paravirt_clobber] "i" (clobber) 284 285 /* 286 * Generate some code, and mark it as patchable by the 287 * apply_paravirt() alternate instruction patcher. 288 */ 289 #define _paravirt_alt(insn_string, type, clobber) \ 290 "771:\n\t" insn_string "\n" "772:\n" \ 291 ".pushsection .parainstructions,\"a\"\n" \ 292 _ASM_ALIGN "\n" \ 293 _ASM_PTR " 771b\n" \ 294 " .byte " type "\n" \ 295 " .byte 772b-771b\n" \ 296 " .short " clobber "\n" \ 297 ".popsection\n" 298 299 /* Generate patchable code, with the default asm parameters. */ 300 #define paravirt_alt(insn_string) \ 301 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") 302 303 /* Simple instruction patching code. */ 304 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" 305 306 unsigned int paravirt_patch(u8 type, void *insn_buff, unsigned long addr, unsigned int len); 307 308 int paravirt_disable_iospace(void); 309 310 /* 311 * This generates an indirect call based on the operation type number. 312 * The type number, computed in PARAVIRT_PATCH, is derived from the 313 * offset into the paravirt_patch_template structure, and can therefore be 314 * freely converted back into a structure offset. 315 */ 316 #define PARAVIRT_CALL \ 317 ANNOTATE_RETPOLINE_SAFE \ 318 "call *%c[paravirt_opptr];" 319 320 /* 321 * These macros are intended to wrap calls through one of the paravirt 322 * ops structs, so that they can be later identified and patched at 323 * runtime. 324 * 325 * Normally, a call to a pv_op function is a simple indirect call: 326 * (pv_op_struct.operations)(args...). 327 * 328 * Unfortunately, this is a relatively slow operation for modern CPUs, 329 * because it cannot necessarily determine what the destination 330 * address is. In this case, the address is a runtime constant, so at 331 * the very least we can patch the call to e a simple direct call, or 332 * ideally, patch an inline implementation into the callsite. (Direct 333 * calls are essentially free, because the call and return addresses 334 * are completely predictable.) 335 * 336 * For i386, these macros rely on the standard gcc "regparm(3)" calling 337 * convention, in which the first three arguments are placed in %eax, 338 * %edx, %ecx (in that order), and the remaining arguments are placed 339 * on the stack. All caller-save registers (eax,edx,ecx) are expected 340 * to be modified (either clobbered or used for return values). 341 * X86_64, on the other hand, already specifies a register-based calling 342 * conventions, returning at %rax, with parameters going on %rdi, %rsi, 343 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 344 * special handling for dealing with 4 arguments, unlike i386. 345 * However, x86_64 also have to clobber all caller saved registers, which 346 * unfortunately, are quite a bit (r8 - r11) 347 * 348 * The call instruction itself is marked by placing its start address 349 * and size into the .parainstructions section, so that 350 * apply_paravirt() in arch/i386/kernel/alternative.c can do the 351 * appropriate patching under the control of the backend pv_init_ops 352 * implementation. 353 * 354 * Unfortunately there's no way to get gcc to generate the args setup 355 * for the call, and then allow the call itself to be generated by an 356 * inline asm. Because of this, we must do the complete arg setup and 357 * return value handling from within these macros. This is fairly 358 * cumbersome. 359 * 360 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 361 * It could be extended to more arguments, but there would be little 362 * to be gained from that. For each number of arguments, there are 363 * the two VCALL and CALL variants for void and non-void functions. 364 * 365 * When there is a return value, the invoker of the macro must specify 366 * the return type. The macro then uses sizeof() on that type to 367 * determine whether its a 32 or 64 bit value, and places the return 368 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 369 * 64-bit). For x86_64 machines, it just returns at %rax regardless of 370 * the return value size. 371 * 372 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments 373 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 374 * in low,high order 375 * 376 * Small structures are passed and returned in registers. The macro 377 * calling convention can't directly deal with this, so the wrapper 378 * functions must do this. 379 * 380 * These PVOP_* macros are only defined within this header. This 381 * means that all uses must be wrapped in inline functions. This also 382 * makes sure the incoming and outgoing types are always correct. 383 */ 384 #ifdef CONFIG_X86_32 385 #define PVOP_CALL_ARGS \ 386 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; 387 388 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 389 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 390 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 391 392 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 393 "=c" (__ecx) 394 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 395 396 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 397 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 398 399 #define EXTRA_CLOBBERS 400 #define VEXTRA_CLOBBERS 401 #else /* CONFIG_X86_64 */ 402 /* [re]ax isn't an arg, but the return val */ 403 #define PVOP_CALL_ARGS \ 404 unsigned long __edi = __edi, __esi = __esi, \ 405 __edx = __edx, __ecx = __ecx, __eax = __eax; 406 407 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 408 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 409 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 410 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 411 412 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 413 "=S" (__esi), "=d" (__edx), \ 414 "=c" (__ecx) 415 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 416 417 /* void functions are still allowed [re]ax for scratch */ 418 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 419 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 420 421 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 422 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 423 #endif /* CONFIG_X86_32 */ 424 425 #ifdef CONFIG_PARAVIRT_DEBUG 426 #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) 427 #else 428 #define PVOP_TEST_NULL(op) ((void)pv_ops.op) 429 #endif 430 431 #define PVOP_RETVAL(rettype) \ 432 ({ unsigned long __mask = ~0UL; \ 433 BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \ 434 switch (sizeof(rettype)) { \ 435 case 1: __mask = 0xffUL; break; \ 436 case 2: __mask = 0xffffUL; break; \ 437 case 4: __mask = 0xffffffffUL; break; \ 438 default: break; \ 439 } \ 440 __mask & __eax; \ 441 }) 442 443 444 #define ____PVOP_CALL(ret, op, clbr, call_clbr, extra_clbr, ...) \ 445 ({ \ 446 PVOP_CALL_ARGS; \ 447 PVOP_TEST_NULL(op); \ 448 asm volatile(paravirt_alt(PARAVIRT_CALL) \ 449 : call_clbr, ASM_CALL_CONSTRAINT \ 450 : paravirt_type(op), \ 451 paravirt_clobber(clbr), \ 452 ##__VA_ARGS__ \ 453 : "memory", "cc" extra_clbr); \ 454 ret; \ 455 }) 456 457 #define ____PVOP_ALT_CALL(ret, op, alt, cond, clbr, call_clbr, \ 458 extra_clbr, ...) \ 459 ({ \ 460 PVOP_CALL_ARGS; \ 461 PVOP_TEST_NULL(op); \ 462 asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \ 463 alt, cond) \ 464 : call_clbr, ASM_CALL_CONSTRAINT \ 465 : paravirt_type(op), \ 466 paravirt_clobber(clbr), \ 467 ##__VA_ARGS__ \ 468 : "memory", "cc" extra_clbr); \ 469 ret; \ 470 }) 471 472 #define __PVOP_CALL(rettype, op, ...) \ 473 ____PVOP_CALL(PVOP_RETVAL(rettype), op, CLBR_ANY, \ 474 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__) 475 476 #define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \ 477 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, CLBR_ANY,\ 478 PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \ 479 ##__VA_ARGS__) 480 481 #define __PVOP_CALLEESAVE(rettype, op, ...) \ 482 ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, CLBR_RET_REG, \ 483 PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 484 485 #define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \ 486 ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \ 487 CLBR_RET_REG, PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 488 489 490 #define __PVOP_VCALL(op, ...) \ 491 (void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ 492 VEXTRA_CLOBBERS, ##__VA_ARGS__) 493 494 #define __PVOP_ALT_VCALL(op, alt, cond, ...) \ 495 (void)____PVOP_ALT_CALL(, op, alt, cond, CLBR_ANY, \ 496 PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \ 497 ##__VA_ARGS__) 498 499 #define __PVOP_VCALLEESAVE(op, ...) \ 500 (void)____PVOP_CALL(, op.func, CLBR_RET_REG, \ 501 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 502 503 #define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \ 504 (void)____PVOP_ALT_CALL(, op.func, alt, cond, CLBR_RET_REG, \ 505 PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 506 507 508 #define PVOP_CALL0(rettype, op) \ 509 __PVOP_CALL(rettype, op) 510 #define PVOP_VCALL0(op) \ 511 __PVOP_VCALL(op) 512 #define PVOP_ALT_CALL0(rettype, op, alt, cond) \ 513 __PVOP_ALT_CALL(rettype, op, alt, cond) 514 #define PVOP_ALT_VCALL0(op, alt, cond) \ 515 __PVOP_ALT_VCALL(op, alt, cond) 516 517 #define PVOP_CALLEE0(rettype, op) \ 518 __PVOP_CALLEESAVE(rettype, op) 519 #define PVOP_VCALLEE0(op) \ 520 __PVOP_VCALLEESAVE(op) 521 #define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \ 522 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond) 523 #define PVOP_ALT_VCALLEE0(op, alt, cond) \ 524 __PVOP_ALT_VCALLEESAVE(op, alt, cond) 525 526 527 #define PVOP_CALL1(rettype, op, arg1) \ 528 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1)) 529 #define PVOP_VCALL1(op, arg1) \ 530 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) 531 #define PVOP_ALT_VCALL1(op, arg1, alt, cond) \ 532 __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1)) 533 534 #define PVOP_CALLEE1(rettype, op, arg1) \ 535 __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1)) 536 #define PVOP_VCALLEE1(op, arg1) \ 537 __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1)) 538 #define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \ 539 __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1)) 540 #define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \ 541 __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1)) 542 543 544 #define PVOP_CALL2(rettype, op, arg1, arg2) \ 545 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 546 #define PVOP_VCALL2(op, arg1, arg2) \ 547 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 548 549 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 550 __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \ 551 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 552 #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 553 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \ 554 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 555 556 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 557 __PVOP_CALL(rettype, op, \ 558 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 559 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 560 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 561 __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 562 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 563 564 /* Lazy mode for batching updates / context switch */ 565 enum paravirt_lazy_mode { 566 PARAVIRT_LAZY_NONE, 567 PARAVIRT_LAZY_MMU, 568 PARAVIRT_LAZY_CPU, 569 }; 570 571 enum paravirt_lazy_mode paravirt_get_lazy_mode(void); 572 void paravirt_start_context_switch(struct task_struct *prev); 573 void paravirt_end_context_switch(struct task_struct *next); 574 575 void paravirt_enter_lazy_mmu(void); 576 void paravirt_leave_lazy_mmu(void); 577 void paravirt_flush_lazy_mmu(void); 578 579 void _paravirt_nop(void); 580 u64 _paravirt_ident_64(u64); 581 582 #define paravirt_nop ((void *)_paravirt_nop) 583 584 /* These all sit in the .parainstructions section to tell us what to patch. */ 585 struct paravirt_patch_site { 586 u8 *instr; /* original instructions */ 587 u8 type; /* type of this instruction */ 588 u8 len; /* length of original instruction */ 589 }; 590 591 extern struct paravirt_patch_site __parainstructions[], 592 __parainstructions_end[]; 593 594 #endif /* __ASSEMBLY__ */ 595 596 #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 597