1 #ifndef _ASM_X86_PARAVIRT_H
2 #define _ASM_X86_PARAVIRT_H
3 /* Various instructions on x86 need to be replaced for
4 * para-virtualization: those hooks are defined here. */
5
6 #ifdef CONFIG_PARAVIRT
7 #include <asm/pgtable_types.h>
8 #include <asm/asm.h>
9
10 #include <asm/paravirt_types.h>
11
12 #ifndef __ASSEMBLY__
13 #include <linux/bug.h>
14 #include <linux/types.h>
15 #include <linux/cpumask.h>
16
paravirt_enabled(void)17 static inline int paravirt_enabled(void)
18 {
19 return pv_info.paravirt_enabled;
20 }
21
load_sp0(struct tss_struct * tss,struct thread_struct * thread)22 static inline void load_sp0(struct tss_struct *tss,
23 struct thread_struct *thread)
24 {
25 PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
26 }
27
28 /* The paravirtualized CPUID instruction. */
__cpuid(unsigned int * eax,unsigned int * ebx,unsigned int * ecx,unsigned int * edx)29 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
30 unsigned int *ecx, unsigned int *edx)
31 {
32 PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
33 }
34
35 /*
36 * These special macros can be used to get or set a debugging register
37 */
paravirt_get_debugreg(int reg)38 static inline unsigned long paravirt_get_debugreg(int reg)
39 {
40 return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
41 }
42 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
set_debugreg(unsigned long val,int reg)43 static inline void set_debugreg(unsigned long val, int reg)
44 {
45 PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
46 }
47
clts(void)48 static inline void clts(void)
49 {
50 PVOP_VCALL0(pv_cpu_ops.clts);
51 }
52
read_cr0(void)53 static inline unsigned long read_cr0(void)
54 {
55 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
56 }
57
write_cr0(unsigned long x)58 static inline void write_cr0(unsigned long x)
59 {
60 PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
61 }
62
read_cr2(void)63 static inline unsigned long read_cr2(void)
64 {
65 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
66 }
67
write_cr2(unsigned long x)68 static inline void write_cr2(unsigned long x)
69 {
70 PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
71 }
72
read_cr3(void)73 static inline unsigned long read_cr3(void)
74 {
75 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
76 }
77
write_cr3(unsigned long x)78 static inline void write_cr3(unsigned long x)
79 {
80 PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
81 }
82
read_cr4(void)83 static inline unsigned long read_cr4(void)
84 {
85 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
86 }
read_cr4_safe(void)87 static inline unsigned long read_cr4_safe(void)
88 {
89 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
90 }
91
write_cr4(unsigned long x)92 static inline void write_cr4(unsigned long x)
93 {
94 PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
95 }
96
97 #ifdef CONFIG_X86_64
read_cr8(void)98 static inline unsigned long read_cr8(void)
99 {
100 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
101 }
102
write_cr8(unsigned long x)103 static inline void write_cr8(unsigned long x)
104 {
105 PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
106 }
107 #endif
108
arch_safe_halt(void)109 static inline void arch_safe_halt(void)
110 {
111 PVOP_VCALL0(pv_irq_ops.safe_halt);
112 }
113
halt(void)114 static inline void halt(void)
115 {
116 PVOP_VCALL0(pv_irq_ops.halt);
117 }
118
wbinvd(void)119 static inline void wbinvd(void)
120 {
121 PVOP_VCALL0(pv_cpu_ops.wbinvd);
122 }
123
124 #define get_kernel_rpl() (pv_info.kernel_rpl)
125
paravirt_read_msr(unsigned msr,int * err)126 static inline u64 paravirt_read_msr(unsigned msr, int *err)
127 {
128 return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
129 }
130
paravirt_rdmsr_regs(u32 * regs)131 static inline int paravirt_rdmsr_regs(u32 *regs)
132 {
133 return PVOP_CALL1(int, pv_cpu_ops.rdmsr_regs, regs);
134 }
135
paravirt_write_msr(unsigned msr,unsigned low,unsigned high)136 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
137 {
138 return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
139 }
140
paravirt_wrmsr_regs(u32 * regs)141 static inline int paravirt_wrmsr_regs(u32 *regs)
142 {
143 return PVOP_CALL1(int, pv_cpu_ops.wrmsr_regs, regs);
144 }
145
146 /* These should all do BUG_ON(_err), but our headers are too tangled. */
147 #define rdmsr(msr, val1, val2) \
148 do { \
149 int _err; \
150 u64 _l = paravirt_read_msr(msr, &_err); \
151 val1 = (u32)_l; \
152 val2 = _l >> 32; \
153 } while (0)
154
155 #define wrmsr(msr, val1, val2) \
156 do { \
157 paravirt_write_msr(msr, val1, val2); \
158 } while (0)
159
160 #define rdmsrl(msr, val) \
161 do { \
162 int _err; \
163 val = paravirt_read_msr(msr, &_err); \
164 } while (0)
165
166 #define wrmsrl(msr, val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
167 #define wrmsr_safe(msr, a, b) paravirt_write_msr(msr, a, b)
168
169 /* rdmsr with exception handling */
170 #define rdmsr_safe(msr, a, b) \
171 ({ \
172 int _err; \
173 u64 _l = paravirt_read_msr(msr, &_err); \
174 (*a) = (u32)_l; \
175 (*b) = _l >> 32; \
176 _err; \
177 })
178
179 #define rdmsr_safe_regs(regs) paravirt_rdmsr_regs(regs)
180 #define wrmsr_safe_regs(regs) paravirt_wrmsr_regs(regs)
181
rdmsrl_safe(unsigned msr,unsigned long long * p)182 static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
183 {
184 int err;
185
186 *p = paravirt_read_msr(msr, &err);
187 return err;
188 }
rdmsrl_amd_safe(unsigned msr,unsigned long long * p)189 static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
190 {
191 u32 gprs[8] = { 0 };
192 int err;
193
194 gprs[1] = msr;
195 gprs[7] = 0x9c5a203a;
196
197 err = paravirt_rdmsr_regs(gprs);
198
199 *p = gprs[0] | ((u64)gprs[2] << 32);
200
201 return err;
202 }
203
wrmsrl_amd_safe(unsigned msr,unsigned long long val)204 static inline int wrmsrl_amd_safe(unsigned msr, unsigned long long val)
205 {
206 u32 gprs[8] = { 0 };
207
208 gprs[0] = (u32)val;
209 gprs[1] = msr;
210 gprs[2] = val >> 32;
211 gprs[7] = 0x9c5a203a;
212
213 return paravirt_wrmsr_regs(gprs);
214 }
215
paravirt_read_tsc(void)216 static inline u64 paravirt_read_tsc(void)
217 {
218 return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
219 }
220
221 #define rdtscl(low) \
222 do { \
223 u64 _l = paravirt_read_tsc(); \
224 low = (int)_l; \
225 } while (0)
226
227 #define rdtscll(val) (val = paravirt_read_tsc())
228
paravirt_sched_clock(void)229 static inline unsigned long long paravirt_sched_clock(void)
230 {
231 return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
232 }
233
234 struct static_key;
235 extern struct static_key paravirt_steal_enabled;
236 extern struct static_key paravirt_steal_rq_enabled;
237
paravirt_steal_clock(int cpu)238 static inline u64 paravirt_steal_clock(int cpu)
239 {
240 return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu);
241 }
242
paravirt_read_pmc(int counter)243 static inline unsigned long long paravirt_read_pmc(int counter)
244 {
245 return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
246 }
247
248 #define rdpmc(counter, low, high) \
249 do { \
250 u64 _l = paravirt_read_pmc(counter); \
251 low = (u32)_l; \
252 high = _l >> 32; \
253 } while (0)
254
paravirt_rdtscp(unsigned int * aux)255 static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
256 {
257 return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
258 }
259
260 #define rdtscp(low, high, aux) \
261 do { \
262 int __aux; \
263 unsigned long __val = paravirt_rdtscp(&__aux); \
264 (low) = (u32)__val; \
265 (high) = (u32)(__val >> 32); \
266 (aux) = __aux; \
267 } while (0)
268
269 #define rdtscpll(val, aux) \
270 do { \
271 unsigned long __aux; \
272 val = paravirt_rdtscp(&__aux); \
273 (aux) = __aux; \
274 } while (0)
275
paravirt_alloc_ldt(struct desc_struct * ldt,unsigned entries)276 static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
277 {
278 PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
279 }
280
paravirt_free_ldt(struct desc_struct * ldt,unsigned entries)281 static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
282 {
283 PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries);
284 }
285
load_TR_desc(void)286 static inline void load_TR_desc(void)
287 {
288 PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
289 }
load_gdt(const struct desc_ptr * dtr)290 static inline void load_gdt(const struct desc_ptr *dtr)
291 {
292 PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
293 }
load_idt(const struct desc_ptr * dtr)294 static inline void load_idt(const struct desc_ptr *dtr)
295 {
296 PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
297 }
set_ldt(const void * addr,unsigned entries)298 static inline void set_ldt(const void *addr, unsigned entries)
299 {
300 PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
301 }
store_gdt(struct desc_ptr * dtr)302 static inline void store_gdt(struct desc_ptr *dtr)
303 {
304 PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
305 }
store_idt(struct desc_ptr * dtr)306 static inline void store_idt(struct desc_ptr *dtr)
307 {
308 PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
309 }
paravirt_store_tr(void)310 static inline unsigned long paravirt_store_tr(void)
311 {
312 return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
313 }
314 #define store_tr(tr) ((tr) = paravirt_store_tr())
load_TLS(struct thread_struct * t,unsigned cpu)315 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
316 {
317 PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
318 }
319
320 #ifdef CONFIG_X86_64
load_gs_index(unsigned int gs)321 static inline void load_gs_index(unsigned int gs)
322 {
323 PVOP_VCALL1(pv_cpu_ops.load_gs_index, gs);
324 }
325 #endif
326
write_ldt_entry(struct desc_struct * dt,int entry,const void * desc)327 static inline void write_ldt_entry(struct desc_struct *dt, int entry,
328 const void *desc)
329 {
330 PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
331 }
332
write_gdt_entry(struct desc_struct * dt,int entry,void * desc,int type)333 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
334 void *desc, int type)
335 {
336 PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
337 }
338
write_idt_entry(gate_desc * dt,int entry,const gate_desc * g)339 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
340 {
341 PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
342 }
set_iopl_mask(unsigned mask)343 static inline void set_iopl_mask(unsigned mask)
344 {
345 PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
346 }
347
348 /* The paravirtualized I/O functions */
slow_down_io(void)349 static inline void slow_down_io(void)
350 {
351 pv_cpu_ops.io_delay();
352 #ifdef REALLY_SLOW_IO
353 pv_cpu_ops.io_delay();
354 pv_cpu_ops.io_delay();
355 pv_cpu_ops.io_delay();
356 #endif
357 }
358
359 #ifdef CONFIG_SMP
startup_ipi_hook(int phys_apicid,unsigned long start_eip,unsigned long start_esp)360 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
361 unsigned long start_esp)
362 {
363 PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
364 phys_apicid, start_eip, start_esp);
365 }
366 #endif
367
paravirt_activate_mm(struct mm_struct * prev,struct mm_struct * next)368 static inline void paravirt_activate_mm(struct mm_struct *prev,
369 struct mm_struct *next)
370 {
371 PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
372 }
373
arch_dup_mmap(struct mm_struct * oldmm,struct mm_struct * mm)374 static inline void arch_dup_mmap(struct mm_struct *oldmm,
375 struct mm_struct *mm)
376 {
377 PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
378 }
379
arch_exit_mmap(struct mm_struct * mm)380 static inline void arch_exit_mmap(struct mm_struct *mm)
381 {
382 PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
383 }
384
__flush_tlb(void)385 static inline void __flush_tlb(void)
386 {
387 PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
388 }
__flush_tlb_global(void)389 static inline void __flush_tlb_global(void)
390 {
391 PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
392 }
__flush_tlb_single(unsigned long addr)393 static inline void __flush_tlb_single(unsigned long addr)
394 {
395 PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
396 }
397
flush_tlb_others(const struct cpumask * cpumask,struct mm_struct * mm,unsigned long va)398 static inline void flush_tlb_others(const struct cpumask *cpumask,
399 struct mm_struct *mm,
400 unsigned long va)
401 {
402 PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, cpumask, mm, va);
403 }
404
paravirt_pgd_alloc(struct mm_struct * mm)405 static inline int paravirt_pgd_alloc(struct mm_struct *mm)
406 {
407 return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm);
408 }
409
paravirt_pgd_free(struct mm_struct * mm,pgd_t * pgd)410 static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd)
411 {
412 PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd);
413 }
414
paravirt_alloc_pte(struct mm_struct * mm,unsigned long pfn)415 static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn)
416 {
417 PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn);
418 }
paravirt_release_pte(unsigned long pfn)419 static inline void paravirt_release_pte(unsigned long pfn)
420 {
421 PVOP_VCALL1(pv_mmu_ops.release_pte, pfn);
422 }
423
paravirt_alloc_pmd(struct mm_struct * mm,unsigned long pfn)424 static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn)
425 {
426 PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn);
427 }
428
paravirt_release_pmd(unsigned long pfn)429 static inline void paravirt_release_pmd(unsigned long pfn)
430 {
431 PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn);
432 }
433
paravirt_alloc_pud(struct mm_struct * mm,unsigned long pfn)434 static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn)
435 {
436 PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn);
437 }
paravirt_release_pud(unsigned long pfn)438 static inline void paravirt_release_pud(unsigned long pfn)
439 {
440 PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
441 }
442
pte_update(struct mm_struct * mm,unsigned long addr,pte_t * ptep)443 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
444 pte_t *ptep)
445 {
446 PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
447 }
pmd_update(struct mm_struct * mm,unsigned long addr,pmd_t * pmdp)448 static inline void pmd_update(struct mm_struct *mm, unsigned long addr,
449 pmd_t *pmdp)
450 {
451 PVOP_VCALL3(pv_mmu_ops.pmd_update, mm, addr, pmdp);
452 }
453
pte_update_defer(struct mm_struct * mm,unsigned long addr,pte_t * ptep)454 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
455 pte_t *ptep)
456 {
457 PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
458 }
459
pmd_update_defer(struct mm_struct * mm,unsigned long addr,pmd_t * pmdp)460 static inline void pmd_update_defer(struct mm_struct *mm, unsigned long addr,
461 pmd_t *pmdp)
462 {
463 PVOP_VCALL3(pv_mmu_ops.pmd_update_defer, mm, addr, pmdp);
464 }
465
__pte(pteval_t val)466 static inline pte_t __pte(pteval_t val)
467 {
468 pteval_t ret;
469
470 if (sizeof(pteval_t) > sizeof(long))
471 ret = PVOP_CALLEE2(pteval_t,
472 pv_mmu_ops.make_pte,
473 val, (u64)val >> 32);
474 else
475 ret = PVOP_CALLEE1(pteval_t,
476 pv_mmu_ops.make_pte,
477 val);
478
479 return (pte_t) { .pte = ret };
480 }
481
pte_val(pte_t pte)482 static inline pteval_t pte_val(pte_t pte)
483 {
484 pteval_t ret;
485
486 if (sizeof(pteval_t) > sizeof(long))
487 ret = PVOP_CALLEE2(pteval_t, pv_mmu_ops.pte_val,
488 pte.pte, (u64)pte.pte >> 32);
489 else
490 ret = PVOP_CALLEE1(pteval_t, pv_mmu_ops.pte_val,
491 pte.pte);
492
493 return ret;
494 }
495
__pgd(pgdval_t val)496 static inline pgd_t __pgd(pgdval_t val)
497 {
498 pgdval_t ret;
499
500 if (sizeof(pgdval_t) > sizeof(long))
501 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.make_pgd,
502 val, (u64)val >> 32);
503 else
504 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.make_pgd,
505 val);
506
507 return (pgd_t) { ret };
508 }
509
pgd_val(pgd_t pgd)510 static inline pgdval_t pgd_val(pgd_t pgd)
511 {
512 pgdval_t ret;
513
514 if (sizeof(pgdval_t) > sizeof(long))
515 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.pgd_val,
516 pgd.pgd, (u64)pgd.pgd >> 32);
517 else
518 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.pgd_val,
519 pgd.pgd);
520
521 return ret;
522 }
523
524 #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
ptep_modify_prot_start(struct mm_struct * mm,unsigned long addr,pte_t * ptep)525 static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
526 pte_t *ptep)
527 {
528 pteval_t ret;
529
530 ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start,
531 mm, addr, ptep);
532
533 return (pte_t) { .pte = ret };
534 }
535
ptep_modify_prot_commit(struct mm_struct * mm,unsigned long addr,pte_t * ptep,pte_t pte)536 static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
537 pte_t *ptep, pte_t pte)
538 {
539 if (sizeof(pteval_t) > sizeof(long))
540 /* 5 arg words */
541 pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte);
542 else
543 PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit,
544 mm, addr, ptep, pte.pte);
545 }
546
set_pte(pte_t * ptep,pte_t pte)547 static inline void set_pte(pte_t *ptep, pte_t pte)
548 {
549 if (sizeof(pteval_t) > sizeof(long))
550 PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
551 pte.pte, (u64)pte.pte >> 32);
552 else
553 PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
554 pte.pte);
555 }
556
set_pte_at(struct mm_struct * mm,unsigned long addr,pte_t * ptep,pte_t pte)557 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
558 pte_t *ptep, pte_t pte)
559 {
560 if (sizeof(pteval_t) > sizeof(long))
561 /* 5 arg words */
562 pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
563 else
564 PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
565 }
566
567 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
set_pmd_at(struct mm_struct * mm,unsigned long addr,pmd_t * pmdp,pmd_t pmd)568 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
569 pmd_t *pmdp, pmd_t pmd)
570 {
571 if (sizeof(pmdval_t) > sizeof(long))
572 /* 5 arg words */
573 pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
574 else
575 PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp,
576 native_pmd_val(pmd));
577 }
578 #endif
579
set_pmd(pmd_t * pmdp,pmd_t pmd)580 static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
581 {
582 pmdval_t val = native_pmd_val(pmd);
583
584 if (sizeof(pmdval_t) > sizeof(long))
585 PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
586 else
587 PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
588 }
589
590 #if PAGETABLE_LEVELS >= 3
__pmd(pmdval_t val)591 static inline pmd_t __pmd(pmdval_t val)
592 {
593 pmdval_t ret;
594
595 if (sizeof(pmdval_t) > sizeof(long))
596 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.make_pmd,
597 val, (u64)val >> 32);
598 else
599 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.make_pmd,
600 val);
601
602 return (pmd_t) { ret };
603 }
604
pmd_val(pmd_t pmd)605 static inline pmdval_t pmd_val(pmd_t pmd)
606 {
607 pmdval_t ret;
608
609 if (sizeof(pmdval_t) > sizeof(long))
610 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.pmd_val,
611 pmd.pmd, (u64)pmd.pmd >> 32);
612 else
613 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.pmd_val,
614 pmd.pmd);
615
616 return ret;
617 }
618
set_pud(pud_t * pudp,pud_t pud)619 static inline void set_pud(pud_t *pudp, pud_t pud)
620 {
621 pudval_t val = native_pud_val(pud);
622
623 if (sizeof(pudval_t) > sizeof(long))
624 PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
625 val, (u64)val >> 32);
626 else
627 PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
628 val);
629 }
630 #if PAGETABLE_LEVELS == 4
__pud(pudval_t val)631 static inline pud_t __pud(pudval_t val)
632 {
633 pudval_t ret;
634
635 if (sizeof(pudval_t) > sizeof(long))
636 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.make_pud,
637 val, (u64)val >> 32);
638 else
639 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.make_pud,
640 val);
641
642 return (pud_t) { ret };
643 }
644
pud_val(pud_t pud)645 static inline pudval_t pud_val(pud_t pud)
646 {
647 pudval_t ret;
648
649 if (sizeof(pudval_t) > sizeof(long))
650 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.pud_val,
651 pud.pud, (u64)pud.pud >> 32);
652 else
653 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.pud_val,
654 pud.pud);
655
656 return ret;
657 }
658
set_pgd(pgd_t * pgdp,pgd_t pgd)659 static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
660 {
661 pgdval_t val = native_pgd_val(pgd);
662
663 if (sizeof(pgdval_t) > sizeof(long))
664 PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp,
665 val, (u64)val >> 32);
666 else
667 PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp,
668 val);
669 }
670
pgd_clear(pgd_t * pgdp)671 static inline void pgd_clear(pgd_t *pgdp)
672 {
673 set_pgd(pgdp, __pgd(0));
674 }
675
pud_clear(pud_t * pudp)676 static inline void pud_clear(pud_t *pudp)
677 {
678 set_pud(pudp, __pud(0));
679 }
680
681 #endif /* PAGETABLE_LEVELS == 4 */
682
683 #endif /* PAGETABLE_LEVELS >= 3 */
684
685 #ifdef CONFIG_X86_PAE
686 /* Special-case pte-setting operations for PAE, which can't update a
687 64-bit pte atomically */
set_pte_atomic(pte_t * ptep,pte_t pte)688 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
689 {
690 PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
691 pte.pte, pte.pte >> 32);
692 }
693
pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)694 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
695 pte_t *ptep)
696 {
697 PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
698 }
699
pmd_clear(pmd_t * pmdp)700 static inline void pmd_clear(pmd_t *pmdp)
701 {
702 PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
703 }
704 #else /* !CONFIG_X86_PAE */
set_pte_atomic(pte_t * ptep,pte_t pte)705 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
706 {
707 set_pte(ptep, pte);
708 }
709
pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)710 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
711 pte_t *ptep)
712 {
713 set_pte_at(mm, addr, ptep, __pte(0));
714 }
715
pmd_clear(pmd_t * pmdp)716 static inline void pmd_clear(pmd_t *pmdp)
717 {
718 set_pmd(pmdp, __pmd(0));
719 }
720 #endif /* CONFIG_X86_PAE */
721
722 #define __HAVE_ARCH_START_CONTEXT_SWITCH
arch_start_context_switch(struct task_struct * prev)723 static inline void arch_start_context_switch(struct task_struct *prev)
724 {
725 PVOP_VCALL1(pv_cpu_ops.start_context_switch, prev);
726 }
727
arch_end_context_switch(struct task_struct * next)728 static inline void arch_end_context_switch(struct task_struct *next)
729 {
730 PVOP_VCALL1(pv_cpu_ops.end_context_switch, next);
731 }
732
733 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
arch_enter_lazy_mmu_mode(void)734 static inline void arch_enter_lazy_mmu_mode(void)
735 {
736 PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
737 }
738
arch_leave_lazy_mmu_mode(void)739 static inline void arch_leave_lazy_mmu_mode(void)
740 {
741 PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
742 }
743
arch_flush_lazy_mmu_mode(void)744 static inline void arch_flush_lazy_mmu_mode(void)
745 {
746 PVOP_VCALL0(pv_mmu_ops.lazy_mode.flush);
747 }
748
__set_fixmap(unsigned idx,phys_addr_t phys,pgprot_t flags)749 static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
750 phys_addr_t phys, pgprot_t flags)
751 {
752 pv_mmu_ops.set_fixmap(idx, phys, flags);
753 }
754
755 #if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS)
756
arch_spin_is_locked(struct arch_spinlock * lock)757 static inline int arch_spin_is_locked(struct arch_spinlock *lock)
758 {
759 return PVOP_CALL1(int, pv_lock_ops.spin_is_locked, lock);
760 }
761
arch_spin_is_contended(struct arch_spinlock * lock)762 static inline int arch_spin_is_contended(struct arch_spinlock *lock)
763 {
764 return PVOP_CALL1(int, pv_lock_ops.spin_is_contended, lock);
765 }
766 #define arch_spin_is_contended arch_spin_is_contended
767
arch_spin_lock(struct arch_spinlock * lock)768 static __always_inline void arch_spin_lock(struct arch_spinlock *lock)
769 {
770 PVOP_VCALL1(pv_lock_ops.spin_lock, lock);
771 }
772
arch_spin_lock_flags(struct arch_spinlock * lock,unsigned long flags)773 static __always_inline void arch_spin_lock_flags(struct arch_spinlock *lock,
774 unsigned long flags)
775 {
776 PVOP_VCALL2(pv_lock_ops.spin_lock_flags, lock, flags);
777 }
778
arch_spin_trylock(struct arch_spinlock * lock)779 static __always_inline int arch_spin_trylock(struct arch_spinlock *lock)
780 {
781 return PVOP_CALL1(int, pv_lock_ops.spin_trylock, lock);
782 }
783
arch_spin_unlock(struct arch_spinlock * lock)784 static __always_inline void arch_spin_unlock(struct arch_spinlock *lock)
785 {
786 PVOP_VCALL1(pv_lock_ops.spin_unlock, lock);
787 }
788
789 #endif
790
791 #ifdef CONFIG_X86_32
792 #define PV_SAVE_REGS "pushl %ecx; pushl %edx;"
793 #define PV_RESTORE_REGS "popl %edx; popl %ecx;"
794
795 /* save and restore all caller-save registers, except return value */
796 #define PV_SAVE_ALL_CALLER_REGS "pushl %ecx;"
797 #define PV_RESTORE_ALL_CALLER_REGS "popl %ecx;"
798
799 #define PV_FLAGS_ARG "0"
800 #define PV_EXTRA_CLOBBERS
801 #define PV_VEXTRA_CLOBBERS
802 #else
803 /* save and restore all caller-save registers, except return value */
804 #define PV_SAVE_ALL_CALLER_REGS \
805 "push %rcx;" \
806 "push %rdx;" \
807 "push %rsi;" \
808 "push %rdi;" \
809 "push %r8;" \
810 "push %r9;" \
811 "push %r10;" \
812 "push %r11;"
813 #define PV_RESTORE_ALL_CALLER_REGS \
814 "pop %r11;" \
815 "pop %r10;" \
816 "pop %r9;" \
817 "pop %r8;" \
818 "pop %rdi;" \
819 "pop %rsi;" \
820 "pop %rdx;" \
821 "pop %rcx;"
822
823 /* We save some registers, but all of them, that's too much. We clobber all
824 * caller saved registers but the argument parameter */
825 #define PV_SAVE_REGS "pushq %%rdi;"
826 #define PV_RESTORE_REGS "popq %%rdi;"
827 #define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx", "rsi"
828 #define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx", "rsi"
829 #define PV_FLAGS_ARG "D"
830 #endif
831
832 /*
833 * Generate a thunk around a function which saves all caller-save
834 * registers except for the return value. This allows C functions to
835 * be called from assembler code where fewer than normal registers are
836 * available. It may also help code generation around calls from C
837 * code if the common case doesn't use many registers.
838 *
839 * When a callee is wrapped in a thunk, the caller can assume that all
840 * arg regs and all scratch registers are preserved across the
841 * call. The return value in rax/eax will not be saved, even for void
842 * functions.
843 */
844 #define PV_CALLEE_SAVE_REGS_THUNK(func) \
845 extern typeof(func) __raw_callee_save_##func; \
846 static void *__##func##__ __used = func; \
847 \
848 asm(".pushsection .text;" \
849 "__raw_callee_save_" #func ": " \
850 PV_SAVE_ALL_CALLER_REGS \
851 "call " #func ";" \
852 PV_RESTORE_ALL_CALLER_REGS \
853 "ret;" \
854 ".popsection")
855
856 /* Get a reference to a callee-save function */
857 #define PV_CALLEE_SAVE(func) \
858 ((struct paravirt_callee_save) { __raw_callee_save_##func })
859
860 /* Promise that "func" already uses the right calling convention */
861 #define __PV_IS_CALLEE_SAVE(func) \
862 ((struct paravirt_callee_save) { func })
863
arch_local_save_flags(void)864 static inline notrace unsigned long arch_local_save_flags(void)
865 {
866 return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl);
867 }
868
arch_local_irq_restore(unsigned long f)869 static inline notrace void arch_local_irq_restore(unsigned long f)
870 {
871 PVOP_VCALLEE1(pv_irq_ops.restore_fl, f);
872 }
873
arch_local_irq_disable(void)874 static inline notrace void arch_local_irq_disable(void)
875 {
876 PVOP_VCALLEE0(pv_irq_ops.irq_disable);
877 }
878
arch_local_irq_enable(void)879 static inline notrace void arch_local_irq_enable(void)
880 {
881 PVOP_VCALLEE0(pv_irq_ops.irq_enable);
882 }
883
arch_local_irq_save(void)884 static inline notrace unsigned long arch_local_irq_save(void)
885 {
886 unsigned long f;
887
888 f = arch_local_save_flags();
889 arch_local_irq_disable();
890 return f;
891 }
892
893
894 /* Make sure as little as possible of this mess escapes. */
895 #undef PARAVIRT_CALL
896 #undef __PVOP_CALL
897 #undef __PVOP_VCALL
898 #undef PVOP_VCALL0
899 #undef PVOP_CALL0
900 #undef PVOP_VCALL1
901 #undef PVOP_CALL1
902 #undef PVOP_VCALL2
903 #undef PVOP_CALL2
904 #undef PVOP_VCALL3
905 #undef PVOP_CALL3
906 #undef PVOP_VCALL4
907 #undef PVOP_CALL4
908
909 extern void default_banner(void);
910
911 #else /* __ASSEMBLY__ */
912
913 #define _PVSITE(ptype, clobbers, ops, word, algn) \
914 771:; \
915 ops; \
916 772:; \
917 .pushsection .parainstructions,"a"; \
918 .align algn; \
919 word 771b; \
920 .byte ptype; \
921 .byte 772b-771b; \
922 .short clobbers; \
923 .popsection
924
925
926 #define COND_PUSH(set, mask, reg) \
927 .if ((~(set)) & mask); push %reg; .endif
928 #define COND_POP(set, mask, reg) \
929 .if ((~(set)) & mask); pop %reg; .endif
930
931 #ifdef CONFIG_X86_64
932
933 #define PV_SAVE_REGS(set) \
934 COND_PUSH(set, CLBR_RAX, rax); \
935 COND_PUSH(set, CLBR_RCX, rcx); \
936 COND_PUSH(set, CLBR_RDX, rdx); \
937 COND_PUSH(set, CLBR_RSI, rsi); \
938 COND_PUSH(set, CLBR_RDI, rdi); \
939 COND_PUSH(set, CLBR_R8, r8); \
940 COND_PUSH(set, CLBR_R9, r9); \
941 COND_PUSH(set, CLBR_R10, r10); \
942 COND_PUSH(set, CLBR_R11, r11)
943 #define PV_RESTORE_REGS(set) \
944 COND_POP(set, CLBR_R11, r11); \
945 COND_POP(set, CLBR_R10, r10); \
946 COND_POP(set, CLBR_R9, r9); \
947 COND_POP(set, CLBR_R8, r8); \
948 COND_POP(set, CLBR_RDI, rdi); \
949 COND_POP(set, CLBR_RSI, rsi); \
950 COND_POP(set, CLBR_RDX, rdx); \
951 COND_POP(set, CLBR_RCX, rcx); \
952 COND_POP(set, CLBR_RAX, rax)
953
954 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8)
955 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8)
956 #define PARA_INDIRECT(addr) *addr(%rip)
957 #else
958 #define PV_SAVE_REGS(set) \
959 COND_PUSH(set, CLBR_EAX, eax); \
960 COND_PUSH(set, CLBR_EDI, edi); \
961 COND_PUSH(set, CLBR_ECX, ecx); \
962 COND_PUSH(set, CLBR_EDX, edx)
963 #define PV_RESTORE_REGS(set) \
964 COND_POP(set, CLBR_EDX, edx); \
965 COND_POP(set, CLBR_ECX, ecx); \
966 COND_POP(set, CLBR_EDI, edi); \
967 COND_POP(set, CLBR_EAX, eax)
968
969 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4)
970 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4)
971 #define PARA_INDIRECT(addr) *%cs:addr
972 #endif
973
974 #define INTERRUPT_RETURN \
975 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \
976 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_iret))
977
978 #define DISABLE_INTERRUPTS(clobbers) \
979 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
980 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
981 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_disable); \
982 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
983
984 #define ENABLE_INTERRUPTS(clobbers) \
985 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \
986 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
987 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_enable); \
988 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
989
990 #define USERGS_SYSRET32 \
991 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret32), \
992 CLBR_NONE, \
993 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret32))
994
995 #ifdef CONFIG_X86_32
996 #define GET_CR0_INTO_EAX \
997 push %ecx; push %edx; \
998 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_read_cr0); \
999 pop %edx; pop %ecx
1000
1001 #define ENABLE_INTERRUPTS_SYSEXIT \
1002 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), \
1003 CLBR_NONE, \
1004 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_irq_enable_sysexit))
1005
1006
1007 #else /* !CONFIG_X86_32 */
1008
1009 /*
1010 * If swapgs is used while the userspace stack is still current,
1011 * there's no way to call a pvop. The PV replacement *must* be
1012 * inlined, or the swapgs instruction must be trapped and emulated.
1013 */
1014 #define SWAPGS_UNSAFE_STACK \
1015 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
1016 swapgs)
1017
1018 /*
1019 * Note: swapgs is very special, and in practise is either going to be
1020 * implemented with a single "swapgs" instruction or something very
1021 * special. Either way, we don't need to save any registers for
1022 * it.
1023 */
1024 #define SWAPGS \
1025 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
1026 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_swapgs) \
1027 )
1028
1029 #define GET_CR2_INTO_RCX \
1030 call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2); \
1031 movq %rax, %rcx; \
1032 xorq %rax, %rax;
1033
1034 #define PARAVIRT_ADJUST_EXCEPTION_FRAME \
1035 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_adjust_exception_frame), \
1036 CLBR_NONE, \
1037 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_adjust_exception_frame))
1038
1039 #define USERGS_SYSRET64 \
1040 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \
1041 CLBR_NONE, \
1042 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret64))
1043
1044 #define ENABLE_INTERRUPTS_SYSEXIT32 \
1045 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), \
1046 CLBR_NONE, \
1047 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_irq_enable_sysexit))
1048 #endif /* CONFIG_X86_32 */
1049
1050 #endif /* __ASSEMBLY__ */
1051 #else /* CONFIG_PARAVIRT */
1052 # define default_banner x86_init_noop
1053 #endif /* !CONFIG_PARAVIRT */
1054 #endif /* _ASM_X86_PARAVIRT_H */
1055