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_NONE 0 7 #define CLBR_EAX (1 << 0) 8 #define CLBR_ECX (1 << 1) 9 #define CLBR_EDX (1 << 2) 10 #define CLBR_EDI (1 << 3) 11 12 #ifdef CONFIG_X86_32 13 /* CLBR_ANY should match all regs platform has. For i386, that's just it */ 14 #define CLBR_ANY ((1 << 4) - 1) 15 16 #define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX) 17 #define CLBR_RET_REG (CLBR_EAX | CLBR_EDX) 18 #define CLBR_SCRATCH (0) 19 #else 20 #define CLBR_RAX CLBR_EAX 21 #define CLBR_RCX CLBR_ECX 22 #define CLBR_RDX CLBR_EDX 23 #define CLBR_RDI CLBR_EDI 24 #define CLBR_RSI (1 << 4) 25 #define CLBR_R8 (1 << 5) 26 #define CLBR_R9 (1 << 6) 27 #define CLBR_R10 (1 << 7) 28 #define CLBR_R11 (1 << 8) 29 30 #define CLBR_ANY ((1 << 9) - 1) 31 32 #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \ 33 CLBR_RCX | CLBR_R8 | CLBR_R9) 34 #define CLBR_RET_REG (CLBR_RAX) 35 #define CLBR_SCRATCH (CLBR_R10 | CLBR_R11) 36 37 #endif /* X86_64 */ 38 39 #define CLBR_CALLEE_SAVE ((CLBR_ARG_REGS | CLBR_SCRATCH) & ~CLBR_RET_REG) 40 41 #ifndef __ASSEMBLY__ 42 43 #include <asm/desc_defs.h> 44 #include <asm/kmap_types.h> 45 #include <asm/pgtable_types.h> 46 #include <asm/nospec-branch.h> 47 48 struct page; 49 struct thread_struct; 50 struct desc_ptr; 51 struct tss_struct; 52 struct mm_struct; 53 struct desc_struct; 54 struct task_struct; 55 struct cpumask; 56 struct flush_tlb_info; 57 struct mmu_gather; 58 struct vm_area_struct; 59 60 /* 61 * Wrapper type for pointers to code which uses the non-standard 62 * calling convention. See PV_CALL_SAVE_REGS_THUNK below. 63 */ 64 struct paravirt_callee_save { 65 void *func; 66 }; 67 68 /* general info */ 69 struct pv_info { 70 #ifdef CONFIG_PARAVIRT_XXL 71 unsigned int kernel_rpl; 72 int shared_kernel_pmd; 73 74 #ifdef CONFIG_X86_64 75 u16 extra_user_64bit_cs; /* __USER_CS if none */ 76 #endif 77 #endif 78 79 const char *name; 80 }; 81 82 struct pv_init_ops { 83 /* 84 * Patch may replace one of the defined code sequences with 85 * arbitrary code, subject to the same register constraints. 86 * This generally means the code is not free to clobber any 87 * registers other than EAX. The patch function should return 88 * the number of bytes of code generated, as we nop pad the 89 * rest in generic code. 90 */ 91 unsigned (*patch)(u8 type, void *insn_buff, 92 unsigned long addr, unsigned len); 93 } __no_randomize_layout; 94 95 #ifdef CONFIG_PARAVIRT_XXL 96 struct pv_lazy_ops { 97 /* Set deferred update mode, used for batching operations. */ 98 void (*enter)(void); 99 void (*leave)(void); 100 void (*flush)(void); 101 } __no_randomize_layout; 102 #endif 103 104 struct pv_time_ops { 105 unsigned long long (*sched_clock)(void); 106 unsigned long long (*steal_clock)(int cpu); 107 } __no_randomize_layout; 108 109 struct pv_cpu_ops { 110 /* hooks for various privileged instructions */ 111 void (*io_delay)(void); 112 113 #ifdef CONFIG_PARAVIRT_XXL 114 unsigned long (*get_debugreg)(int regno); 115 void (*set_debugreg)(int regno, unsigned long value); 116 117 unsigned long (*read_cr0)(void); 118 void (*write_cr0)(unsigned long); 119 120 void (*write_cr4)(unsigned long); 121 122 /* Segment descriptor handling */ 123 void (*load_tr_desc)(void); 124 void (*load_gdt)(const struct desc_ptr *); 125 void (*load_idt)(const struct desc_ptr *); 126 void (*set_ldt)(const void *desc, unsigned entries); 127 unsigned long (*store_tr)(void); 128 void (*load_tls)(struct thread_struct *t, unsigned int cpu); 129 #ifdef CONFIG_X86_64 130 void (*load_gs_index)(unsigned int idx); 131 #endif 132 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, 133 const void *desc); 134 void (*write_gdt_entry)(struct desc_struct *, 135 int entrynum, const void *desc, int size); 136 void (*write_idt_entry)(gate_desc *, 137 int entrynum, const gate_desc *gate); 138 void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); 139 void (*free_ldt)(struct desc_struct *ldt, unsigned entries); 140 141 void (*load_sp0)(unsigned long sp0); 142 143 void (*set_iopl_mask)(unsigned mask); 144 145 void (*wbinvd)(void); 146 147 /* cpuid emulation, mostly so that caps bits can be disabled */ 148 void (*cpuid)(unsigned int *eax, unsigned int *ebx, 149 unsigned int *ecx, unsigned int *edx); 150 151 /* Unsafe MSR operations. These will warn or panic on failure. */ 152 u64 (*read_msr)(unsigned int msr); 153 void (*write_msr)(unsigned int msr, unsigned low, unsigned high); 154 155 /* 156 * Safe MSR operations. 157 * read sets err to 0 or -EIO. write returns 0 or -EIO. 158 */ 159 u64 (*read_msr_safe)(unsigned int msr, int *err); 160 int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high); 161 162 u64 (*read_pmc)(int counter); 163 164 /* 165 * Switch to usermode gs and return to 64-bit usermode using 166 * sysret. Only used in 64-bit kernels to return to 64-bit 167 * processes. Usermode register state, including %rsp, must 168 * already be restored. 169 */ 170 void (*usergs_sysret64)(void); 171 172 /* Normal iret. Jump to this with the standard iret stack 173 frame set up. */ 174 void (*iret)(void); 175 176 void (*swapgs)(void); 177 178 void (*start_context_switch)(struct task_struct *prev); 179 void (*end_context_switch)(struct task_struct *next); 180 #endif 181 } __no_randomize_layout; 182 183 struct pv_irq_ops { 184 #ifdef CONFIG_PARAVIRT_XXL 185 /* 186 * Get/set interrupt state. save_fl and restore_fl are only 187 * expected to use X86_EFLAGS_IF; all other bits 188 * returned from save_fl are undefined, and may be ignored by 189 * restore_fl. 190 * 191 * NOTE: These functions callers expect the callee to preserve 192 * more registers than the standard C calling convention. 193 */ 194 struct paravirt_callee_save save_fl; 195 struct paravirt_callee_save restore_fl; 196 struct paravirt_callee_save irq_disable; 197 struct paravirt_callee_save irq_enable; 198 199 void (*safe_halt)(void); 200 void (*halt)(void); 201 #endif 202 } __no_randomize_layout; 203 204 struct pv_mmu_ops { 205 /* TLB operations */ 206 void (*flush_tlb_user)(void); 207 void (*flush_tlb_kernel)(void); 208 void (*flush_tlb_one_user)(unsigned long addr); 209 void (*flush_tlb_others)(const struct cpumask *cpus, 210 const struct flush_tlb_info *info); 211 212 void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); 213 214 /* Hook for intercepting the destruction of an mm_struct. */ 215 void (*exit_mmap)(struct mm_struct *mm); 216 217 #ifdef CONFIG_PARAVIRT_XXL 218 struct paravirt_callee_save read_cr2; 219 void (*write_cr2)(unsigned long); 220 221 unsigned long (*read_cr3)(void); 222 void (*write_cr3)(unsigned long); 223 224 /* Hooks for intercepting the creation/use of an mm_struct. */ 225 void (*activate_mm)(struct mm_struct *prev, 226 struct mm_struct *next); 227 void (*dup_mmap)(struct mm_struct *oldmm, 228 struct mm_struct *mm); 229 230 /* Hooks for allocating and freeing a pagetable top-level */ 231 int (*pgd_alloc)(struct mm_struct *mm); 232 void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 233 234 /* 235 * Hooks for allocating/releasing pagetable pages when they're 236 * attached to a pagetable 237 */ 238 void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 239 void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 240 void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 241 void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); 242 void (*release_pte)(unsigned long pfn); 243 void (*release_pmd)(unsigned long pfn); 244 void (*release_pud)(unsigned long pfn); 245 void (*release_p4d)(unsigned long pfn); 246 247 /* Pagetable manipulation functions */ 248 void (*set_pte)(pte_t *ptep, pte_t pteval); 249 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, 250 pte_t *ptep, pte_t pteval); 251 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 252 253 pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, 254 pte_t *ptep); 255 void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, 256 pte_t *ptep, pte_t pte); 257 258 struct paravirt_callee_save pte_val; 259 struct paravirt_callee_save make_pte; 260 261 struct paravirt_callee_save pgd_val; 262 struct paravirt_callee_save make_pgd; 263 264 #if CONFIG_PGTABLE_LEVELS >= 3 265 #ifdef CONFIG_X86_PAE 266 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); 267 void (*pte_clear)(struct mm_struct *mm, unsigned long addr, 268 pte_t *ptep); 269 void (*pmd_clear)(pmd_t *pmdp); 270 271 #endif /* CONFIG_X86_PAE */ 272 273 void (*set_pud)(pud_t *pudp, pud_t pudval); 274 275 struct paravirt_callee_save pmd_val; 276 struct paravirt_callee_save make_pmd; 277 278 #if CONFIG_PGTABLE_LEVELS >= 4 279 struct paravirt_callee_save pud_val; 280 struct paravirt_callee_save make_pud; 281 282 void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); 283 284 #if CONFIG_PGTABLE_LEVELS >= 5 285 struct paravirt_callee_save p4d_val; 286 struct paravirt_callee_save make_p4d; 287 288 void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); 289 #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 290 291 #endif /* CONFIG_PGTABLE_LEVELS >= 4 */ 292 293 #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ 294 295 struct pv_lazy_ops lazy_mode; 296 297 /* dom0 ops */ 298 299 /* Sometimes the physical address is a pfn, and sometimes its 300 an mfn. We can tell which is which from the index. */ 301 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 302 phys_addr_t phys, pgprot_t flags); 303 #endif 304 } __no_randomize_layout; 305 306 struct arch_spinlock; 307 #ifdef CONFIG_SMP 308 #include <asm/spinlock_types.h> 309 #endif 310 311 struct qspinlock; 312 313 struct pv_lock_ops { 314 void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val); 315 struct paravirt_callee_save queued_spin_unlock; 316 317 void (*wait)(u8 *ptr, u8 val); 318 void (*kick)(int cpu); 319 320 struct paravirt_callee_save vcpu_is_preempted; 321 } __no_randomize_layout; 322 323 /* This contains all the paravirt structures: we get a convenient 324 * number for each function using the offset which we use to indicate 325 * what to patch. */ 326 struct paravirt_patch_template { 327 struct pv_init_ops init; 328 struct pv_time_ops time; 329 struct pv_cpu_ops cpu; 330 struct pv_irq_ops irq; 331 struct pv_mmu_ops mmu; 332 struct pv_lock_ops lock; 333 } __no_randomize_layout; 334 335 extern struct pv_info pv_info; 336 extern struct paravirt_patch_template pv_ops; 337 338 #define PARAVIRT_PATCH(x) \ 339 (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 340 341 #define paravirt_type(op) \ 342 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 343 [paravirt_opptr] "i" (&(pv_ops.op)) 344 #define paravirt_clobber(clobber) \ 345 [paravirt_clobber] "i" (clobber) 346 347 /* 348 * Generate some code, and mark it as patchable by the 349 * apply_paravirt() alternate instruction patcher. 350 */ 351 #define _paravirt_alt(insn_string, type, clobber) \ 352 "771:\n\t" insn_string "\n" "772:\n" \ 353 ".pushsection .parainstructions,\"a\"\n" \ 354 _ASM_ALIGN "\n" \ 355 _ASM_PTR " 771b\n" \ 356 " .byte " type "\n" \ 357 " .byte 772b-771b\n" \ 358 " .short " clobber "\n" \ 359 ".popsection\n" 360 361 /* Generate patchable code, with the default asm parameters. */ 362 #define paravirt_alt(insn_string) \ 363 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") 364 365 /* Simple instruction patching code. */ 366 #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" 367 368 unsigned paravirt_patch_ident_64(void *insn_buff, unsigned len); 369 unsigned paravirt_patch_default(u8 type, void *insn_buff, unsigned long addr, unsigned len); 370 unsigned paravirt_patch_insns(void *insn_buff, unsigned len, const char *start, const char *end); 371 372 unsigned native_patch(u8 type, void *insn_buff, unsigned long addr, unsigned len); 373 374 int paravirt_disable_iospace(void); 375 376 /* 377 * This generates an indirect call based on the operation type number. 378 * The type number, computed in PARAVIRT_PATCH, is derived from the 379 * offset into the paravirt_patch_template structure, and can therefore be 380 * freely converted back into a structure offset. 381 */ 382 #define PARAVIRT_CALL \ 383 ANNOTATE_RETPOLINE_SAFE \ 384 "call *%c[paravirt_opptr];" 385 386 /* 387 * These macros are intended to wrap calls through one of the paravirt 388 * ops structs, so that they can be later identified and patched at 389 * runtime. 390 * 391 * Normally, a call to a pv_op function is a simple indirect call: 392 * (pv_op_struct.operations)(args...). 393 * 394 * Unfortunately, this is a relatively slow operation for modern CPUs, 395 * because it cannot necessarily determine what the destination 396 * address is. In this case, the address is a runtime constant, so at 397 * the very least we can patch the call to e a simple direct call, or 398 * ideally, patch an inline implementation into the callsite. (Direct 399 * calls are essentially free, because the call and return addresses 400 * are completely predictable.) 401 * 402 * For i386, these macros rely on the standard gcc "regparm(3)" calling 403 * convention, in which the first three arguments are placed in %eax, 404 * %edx, %ecx (in that order), and the remaining arguments are placed 405 * on the stack. All caller-save registers (eax,edx,ecx) are expected 406 * to be modified (either clobbered or used for return values). 407 * X86_64, on the other hand, already specifies a register-based calling 408 * conventions, returning at %rax, with parameteres going on %rdi, %rsi, 409 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 410 * special handling for dealing with 4 arguments, unlike i386. 411 * However, x86_64 also have to clobber all caller saved registers, which 412 * unfortunately, are quite a bit (r8 - r11) 413 * 414 * The call instruction itself is marked by placing its start address 415 * and size into the .parainstructions section, so that 416 * apply_paravirt() in arch/i386/kernel/alternative.c can do the 417 * appropriate patching under the control of the backend pv_init_ops 418 * implementation. 419 * 420 * Unfortunately there's no way to get gcc to generate the args setup 421 * for the call, and then allow the call itself to be generated by an 422 * inline asm. Because of this, we must do the complete arg setup and 423 * return value handling from within these macros. This is fairly 424 * cumbersome. 425 * 426 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 427 * It could be extended to more arguments, but there would be little 428 * to be gained from that. For each number of arguments, there are 429 * the two VCALL and CALL variants for void and non-void functions. 430 * 431 * When there is a return value, the invoker of the macro must specify 432 * the return type. The macro then uses sizeof() on that type to 433 * determine whether its a 32 or 64 bit value, and places the return 434 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 435 * 64-bit). For x86_64 machines, it just returns at %rax regardless of 436 * the return value size. 437 * 438 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments 439 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 440 * in low,high order 441 * 442 * Small structures are passed and returned in registers. The macro 443 * calling convention can't directly deal with this, so the wrapper 444 * functions must do this. 445 * 446 * These PVOP_* macros are only defined within this header. This 447 * means that all uses must be wrapped in inline functions. This also 448 * makes sure the incoming and outgoing types are always correct. 449 */ 450 #ifdef CONFIG_X86_32 451 #define PVOP_VCALL_ARGS \ 452 unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; 453 454 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS 455 456 #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 457 #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 458 #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 459 460 #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 461 "=c" (__ecx) 462 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 463 464 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 465 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 466 467 #define EXTRA_CLOBBERS 468 #define VEXTRA_CLOBBERS 469 #else /* CONFIG_X86_64 */ 470 /* [re]ax isn't an arg, but the return val */ 471 #define PVOP_VCALL_ARGS \ 472 unsigned long __edi = __edi, __esi = __esi, \ 473 __edx = __edx, __ecx = __ecx, __eax = __eax; 474 475 #define PVOP_CALL_ARGS PVOP_VCALL_ARGS 476 477 #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 478 #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 479 #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 480 #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 481 482 #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 483 "=S" (__esi), "=d" (__edx), \ 484 "=c" (__ecx) 485 #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 486 487 /* void functions are still allowed [re]ax for scratch */ 488 #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 489 #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 490 491 #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 492 #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 493 #endif /* CONFIG_X86_32 */ 494 495 #ifdef CONFIG_PARAVIRT_DEBUG 496 #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) 497 #else 498 #define PVOP_TEST_NULL(op) ((void)pv_ops.op) 499 #endif 500 501 #define PVOP_RETMASK(rettype) \ 502 ({ unsigned long __mask = ~0UL; \ 503 switch (sizeof(rettype)) { \ 504 case 1: __mask = 0xffUL; break; \ 505 case 2: __mask = 0xffffUL; break; \ 506 case 4: __mask = 0xffffffffUL; break; \ 507 default: break; \ 508 } \ 509 __mask; \ 510 }) 511 512 513 #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \ 514 pre, post, ...) \ 515 ({ \ 516 rettype __ret; \ 517 PVOP_CALL_ARGS; \ 518 PVOP_TEST_NULL(op); \ 519 /* This is 32-bit specific, but is okay in 64-bit */ \ 520 /* since this condition will never hold */ \ 521 if (sizeof(rettype) > sizeof(unsigned long)) { \ 522 asm volatile(pre \ 523 paravirt_alt(PARAVIRT_CALL) \ 524 post \ 525 : call_clbr, ASM_CALL_CONSTRAINT \ 526 : paravirt_type(op), \ 527 paravirt_clobber(clbr), \ 528 ##__VA_ARGS__ \ 529 : "memory", "cc" extra_clbr); \ 530 __ret = (rettype)((((u64)__edx) << 32) | __eax); \ 531 } else { \ 532 asm volatile(pre \ 533 paravirt_alt(PARAVIRT_CALL) \ 534 post \ 535 : call_clbr, ASM_CALL_CONSTRAINT \ 536 : paravirt_type(op), \ 537 paravirt_clobber(clbr), \ 538 ##__VA_ARGS__ \ 539 : "memory", "cc" extra_clbr); \ 540 __ret = (rettype)(__eax & PVOP_RETMASK(rettype)); \ 541 } \ 542 __ret; \ 543 }) 544 545 #define __PVOP_CALL(rettype, op, pre, post, ...) \ 546 ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \ 547 EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__) 548 549 #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \ 550 ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \ 551 PVOP_CALLEE_CLOBBERS, , \ 552 pre, post, ##__VA_ARGS__) 553 554 555 #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \ 556 ({ \ 557 PVOP_VCALL_ARGS; \ 558 PVOP_TEST_NULL(op); \ 559 asm volatile(pre \ 560 paravirt_alt(PARAVIRT_CALL) \ 561 post \ 562 : call_clbr, ASM_CALL_CONSTRAINT \ 563 : paravirt_type(op), \ 564 paravirt_clobber(clbr), \ 565 ##__VA_ARGS__ \ 566 : "memory", "cc" extra_clbr); \ 567 }) 568 569 #define __PVOP_VCALL(op, pre, post, ...) \ 570 ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ 571 VEXTRA_CLOBBERS, \ 572 pre, post, ##__VA_ARGS__) 573 574 #define __PVOP_VCALLEESAVE(op, pre, post, ...) \ 575 ____PVOP_VCALL(op.func, CLBR_RET_REG, \ 576 PVOP_VCALLEE_CLOBBERS, , \ 577 pre, post, ##__VA_ARGS__) 578 579 580 581 #define PVOP_CALL0(rettype, op) \ 582 __PVOP_CALL(rettype, op, "", "") 583 #define PVOP_VCALL0(op) \ 584 __PVOP_VCALL(op, "", "") 585 586 #define PVOP_CALLEE0(rettype, op) \ 587 __PVOP_CALLEESAVE(rettype, op, "", "") 588 #define PVOP_VCALLEE0(op) \ 589 __PVOP_VCALLEESAVE(op, "", "") 590 591 592 #define PVOP_CALL1(rettype, op, arg1) \ 593 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1)) 594 #define PVOP_VCALL1(op, arg1) \ 595 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1)) 596 597 #define PVOP_CALLEE1(rettype, op, arg1) \ 598 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1)) 599 #define PVOP_VCALLEE1(op, arg1) \ 600 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1)) 601 602 603 #define PVOP_CALL2(rettype, op, arg1, arg2) \ 604 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 605 PVOP_CALL_ARG2(arg2)) 606 #define PVOP_VCALL2(op, arg1, arg2) \ 607 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \ 608 PVOP_CALL_ARG2(arg2)) 609 610 #define PVOP_CALLEE2(rettype, op, arg1, arg2) \ 611 __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 612 PVOP_CALL_ARG2(arg2)) 613 #define PVOP_VCALLEE2(op, arg1, arg2) \ 614 __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \ 615 PVOP_CALL_ARG2(arg2)) 616 617 618 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 619 __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 620 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 621 #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 622 __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \ 623 PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 624 625 /* This is the only difference in x86_64. We can make it much simpler */ 626 #ifdef CONFIG_X86_32 627 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 628 __PVOP_CALL(rettype, op, \ 629 "push %[_arg4];", "lea 4(%%esp),%%esp;", \ 630 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 631 PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4))) 632 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 633 __PVOP_VCALL(op, \ 634 "push %[_arg4];", "lea 4(%%esp),%%esp;", \ 635 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ 636 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) 637 #else 638 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 639 __PVOP_CALL(rettype, op, "", "", \ 640 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 641 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 642 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 643 __PVOP_VCALL(op, "", "", \ 644 PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 645 PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 646 #endif 647 648 /* Lazy mode for batching updates / context switch */ 649 enum paravirt_lazy_mode { 650 PARAVIRT_LAZY_NONE, 651 PARAVIRT_LAZY_MMU, 652 PARAVIRT_LAZY_CPU, 653 }; 654 655 enum paravirt_lazy_mode paravirt_get_lazy_mode(void); 656 void paravirt_start_context_switch(struct task_struct *prev); 657 void paravirt_end_context_switch(struct task_struct *next); 658 659 void paravirt_enter_lazy_mmu(void); 660 void paravirt_leave_lazy_mmu(void); 661 void paravirt_flush_lazy_mmu(void); 662 663 void _paravirt_nop(void); 664 u64 _paravirt_ident_64(u64); 665 666 #define paravirt_nop ((void *)_paravirt_nop) 667 668 /* These all sit in the .parainstructions section to tell us what to patch. */ 669 struct paravirt_patch_site { 670 u8 *instr; /* original instructions */ 671 u8 type; /* type of this instruction */ 672 u8 len; /* length of original instruction */ 673 }; 674 675 extern struct paravirt_patch_site __parainstructions[], 676 __parainstructions_end[]; 677 678 #endif /* __ASSEMBLY__ */ 679 680 #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 681