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. */
7 #include <asm/pgtable_types.h>
10 #include <asm/paravirt_types.h>
13 #include <linux/bug.h>
14 #include <linux/types.h>
15 #include <linux/cpumask.h>
16 #include <asm/frame.h>
18 static inline void load_sp0(struct tss_struct *tss,
19 struct thread_struct *thread)
21 PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
24 /* The paravirtualized CPUID instruction. */
25 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
26 unsigned int *ecx, unsigned int *edx)
28 PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
32 * These special macros can be used to get or set a debugging register
34 static inline unsigned long paravirt_get_debugreg(int reg)
36 return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
38 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
39 static inline void set_debugreg(unsigned long val, int reg)
41 PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
44 static inline unsigned long read_cr0(void)
46 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
49 static inline void write_cr0(unsigned long x)
51 PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
54 static inline unsigned long read_cr2(void)
56 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
59 static inline void write_cr2(unsigned long x)
61 PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
64 static inline unsigned long read_cr3(void)
66 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
69 static inline void write_cr3(unsigned long x)
71 PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
74 static inline unsigned long __read_cr4(void)
76 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
79 static inline void __write_cr4(unsigned long x)
81 PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
85 static inline unsigned long read_cr8(void)
87 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
90 static inline void write_cr8(unsigned long x)
92 PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
96 static inline void arch_safe_halt(void)
98 PVOP_VCALL0(pv_irq_ops.safe_halt);
101 static inline void halt(void)
103 PVOP_VCALL0(pv_irq_ops.halt);
106 static inline void wbinvd(void)
108 PVOP_VCALL0(pv_cpu_ops.wbinvd);
111 #define get_kernel_rpl() (pv_info.kernel_rpl)
113 static inline u64 paravirt_read_msr(unsigned msr)
115 return PVOP_CALL1(u64, pv_cpu_ops.read_msr, msr);
118 static inline void paravirt_write_msr(unsigned msr,
119 unsigned low, unsigned high)
121 PVOP_VCALL3(pv_cpu_ops.write_msr, msr, low, high);
124 static inline u64 paravirt_read_msr_safe(unsigned msr, int *err)
126 return PVOP_CALL2(u64, pv_cpu_ops.read_msr_safe, msr, err);
129 static inline int paravirt_write_msr_safe(unsigned msr,
130 unsigned low, unsigned high)
132 return PVOP_CALL3(int, pv_cpu_ops.write_msr_safe, msr, low, high);
135 #define rdmsr(msr, val1, val2) \
137 u64 _l = paravirt_read_msr(msr); \
142 #define wrmsr(msr, val1, val2) \
144 paravirt_write_msr(msr, val1, val2); \
147 #define rdmsrl(msr, val) \
149 val = paravirt_read_msr(msr); \
152 static inline void wrmsrl(unsigned msr, u64 val)
154 wrmsr(msr, (u32)val, (u32)(val>>32));
157 #define wrmsr_safe(msr, a, b) paravirt_write_msr_safe(msr, a, b)
159 /* rdmsr with exception handling */
160 #define rdmsr_safe(msr, a, b) \
163 u64 _l = paravirt_read_msr_safe(msr, &_err); \
169 static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
173 *p = paravirt_read_msr_safe(msr, &err);
177 static inline unsigned long long paravirt_sched_clock(void)
179 return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
183 extern struct static_key paravirt_steal_enabled;
184 extern struct static_key paravirt_steal_rq_enabled;
186 static inline u64 paravirt_steal_clock(int cpu)
188 return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu);
191 static inline unsigned long long paravirt_read_pmc(int counter)
193 return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
196 #define rdpmc(counter, low, high) \
198 u64 _l = paravirt_read_pmc(counter); \
203 #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter))
205 static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
207 PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
210 static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
212 PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries);
215 static inline void load_TR_desc(void)
217 PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
219 static inline void load_gdt(const struct desc_ptr *dtr)
221 PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
223 static inline void load_idt(const struct desc_ptr *dtr)
225 PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
227 static inline void set_ldt(const void *addr, unsigned entries)
229 PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
231 static inline void store_idt(struct desc_ptr *dtr)
233 PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
235 static inline unsigned long paravirt_store_tr(void)
237 return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
239 #define store_tr(tr) ((tr) = paravirt_store_tr())
240 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
242 PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
246 static inline void load_gs_index(unsigned int gs)
248 PVOP_VCALL1(pv_cpu_ops.load_gs_index, gs);
252 static inline void write_ldt_entry(struct desc_struct *dt, int entry,
255 PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
258 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
259 void *desc, int type)
261 PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
264 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
266 PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
268 static inline void set_iopl_mask(unsigned mask)
270 PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
273 /* The paravirtualized I/O functions */
274 static inline void slow_down_io(void)
276 pv_cpu_ops.io_delay();
277 #ifdef REALLY_SLOW_IO
278 pv_cpu_ops.io_delay();
279 pv_cpu_ops.io_delay();
280 pv_cpu_ops.io_delay();
284 static inline void paravirt_activate_mm(struct mm_struct *prev,
285 struct mm_struct *next)
287 PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
290 static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm,
291 struct mm_struct *mm)
293 PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
296 static inline void paravirt_arch_exit_mmap(struct mm_struct *mm)
298 PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
301 static inline void __flush_tlb(void)
303 PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
305 static inline void __flush_tlb_global(void)
307 PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
309 static inline void __flush_tlb_single(unsigned long addr)
311 PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
314 static inline void flush_tlb_others(const struct cpumask *cpumask,
315 struct mm_struct *mm,
319 PVOP_VCALL4(pv_mmu_ops.flush_tlb_others, cpumask, mm, start, end);
322 static inline int paravirt_pgd_alloc(struct mm_struct *mm)
324 return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm);
327 static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd)
329 PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd);
332 static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn)
334 PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn);
336 static inline void paravirt_release_pte(unsigned long pfn)
338 PVOP_VCALL1(pv_mmu_ops.release_pte, pfn);
341 static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn)
343 PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn);
346 static inline void paravirt_release_pmd(unsigned long pfn)
348 PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn);
351 static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn)
353 PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn);
355 static inline void paravirt_release_pud(unsigned long pfn)
357 PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
360 static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn)
362 PVOP_VCALL2(pv_mmu_ops.alloc_p4d, mm, pfn);
365 static inline void paravirt_release_p4d(unsigned long pfn)
367 PVOP_VCALL1(pv_mmu_ops.release_p4d, pfn);
370 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
373 PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
376 static inline pte_t __pte(pteval_t val)
380 if (sizeof(pteval_t) > sizeof(long))
381 ret = PVOP_CALLEE2(pteval_t,
383 val, (u64)val >> 32);
385 ret = PVOP_CALLEE1(pteval_t,
389 return (pte_t) { .pte = ret };
392 static inline pteval_t pte_val(pte_t pte)
396 if (sizeof(pteval_t) > sizeof(long))
397 ret = PVOP_CALLEE2(pteval_t, pv_mmu_ops.pte_val,
398 pte.pte, (u64)pte.pte >> 32);
400 ret = PVOP_CALLEE1(pteval_t, pv_mmu_ops.pte_val,
406 static inline pgd_t __pgd(pgdval_t val)
410 if (sizeof(pgdval_t) > sizeof(long))
411 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.make_pgd,
412 val, (u64)val >> 32);
414 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.make_pgd,
417 return (pgd_t) { ret };
420 static inline pgdval_t pgd_val(pgd_t pgd)
424 if (sizeof(pgdval_t) > sizeof(long))
425 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.pgd_val,
426 pgd.pgd, (u64)pgd.pgd >> 32);
428 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.pgd_val,
434 #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
435 static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
440 ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start,
443 return (pte_t) { .pte = ret };
446 static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
447 pte_t *ptep, pte_t pte)
449 if (sizeof(pteval_t) > sizeof(long))
451 pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte);
453 PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit,
454 mm, addr, ptep, pte.pte);
457 static inline void set_pte(pte_t *ptep, pte_t pte)
459 if (sizeof(pteval_t) > sizeof(long))
460 PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
461 pte.pte, (u64)pte.pte >> 32);
463 PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
467 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
468 pte_t *ptep, pte_t pte)
470 if (sizeof(pteval_t) > sizeof(long))
472 pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
474 PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
477 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
478 pmd_t *pmdp, pmd_t pmd)
480 if (sizeof(pmdval_t) > sizeof(long))
482 pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
484 PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp,
485 native_pmd_val(pmd));
488 static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
489 pud_t *pudp, pud_t pud)
491 if (sizeof(pudval_t) > sizeof(long))
493 pv_mmu_ops.set_pud_at(mm, addr, pudp, pud);
495 PVOP_VCALL4(pv_mmu_ops.set_pud_at, mm, addr, pudp,
496 native_pud_val(pud));
499 static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
501 pmdval_t val = native_pmd_val(pmd);
503 if (sizeof(pmdval_t) > sizeof(long))
504 PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
506 PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
509 #if CONFIG_PGTABLE_LEVELS >= 3
510 static inline pmd_t __pmd(pmdval_t val)
514 if (sizeof(pmdval_t) > sizeof(long))
515 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.make_pmd,
516 val, (u64)val >> 32);
518 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.make_pmd,
521 return (pmd_t) { ret };
524 static inline pmdval_t pmd_val(pmd_t pmd)
528 if (sizeof(pmdval_t) > sizeof(long))
529 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.pmd_val,
530 pmd.pmd, (u64)pmd.pmd >> 32);
532 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.pmd_val,
538 static inline void set_pud(pud_t *pudp, pud_t pud)
540 pudval_t val = native_pud_val(pud);
542 if (sizeof(pudval_t) > sizeof(long))
543 PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
544 val, (u64)val >> 32);
546 PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
549 #if CONFIG_PGTABLE_LEVELS >= 4
550 static inline pud_t __pud(pudval_t val)
554 if (sizeof(pudval_t) > sizeof(long))
555 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.make_pud,
556 val, (u64)val >> 32);
558 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.make_pud,
561 return (pud_t) { ret };
564 static inline pudval_t pud_val(pud_t pud)
568 if (sizeof(pudval_t) > sizeof(long))
569 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.pud_val,
570 pud.pud, (u64)pud.pud >> 32);
572 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.pud_val,
578 static inline void pud_clear(pud_t *pudp)
580 set_pud(pudp, __pud(0));
583 static inline void set_p4d(p4d_t *p4dp, p4d_t p4d)
585 p4dval_t val = native_p4d_val(p4d);
587 if (sizeof(p4dval_t) > sizeof(long))
588 PVOP_VCALL3(pv_mmu_ops.set_p4d, p4dp,
589 val, (u64)val >> 32);
591 PVOP_VCALL2(pv_mmu_ops.set_p4d, p4dp,
595 #if CONFIG_PGTABLE_LEVELS >= 5
597 static inline p4d_t __p4d(p4dval_t val)
599 p4dval_t ret = PVOP_CALLEE1(p4dval_t, pv_mmu_ops.make_p4d, val);
601 return (p4d_t) { ret };
604 static inline p4dval_t p4d_val(p4d_t p4d)
606 return PVOP_CALLEE1(p4dval_t, pv_mmu_ops.p4d_val, p4d.p4d);
609 static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
611 pgdval_t val = native_pgd_val(pgd);
613 PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, val);
616 static inline void pgd_clear(pgd_t *pgdp)
618 set_pgd(pgdp, __pgd(0));
621 #endif /* CONFIG_PGTABLE_LEVELS == 5 */
623 static inline void p4d_clear(p4d_t *p4dp)
625 set_p4d(p4dp, __p4d(0));
628 #endif /* CONFIG_PGTABLE_LEVELS == 4 */
630 #endif /* CONFIG_PGTABLE_LEVELS >= 3 */
632 #ifdef CONFIG_X86_PAE
633 /* Special-case pte-setting operations for PAE, which can't update a
634 64-bit pte atomically */
635 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
637 PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
638 pte.pte, pte.pte >> 32);
641 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
644 PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
647 static inline void pmd_clear(pmd_t *pmdp)
649 PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
651 #else /* !CONFIG_X86_PAE */
652 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
657 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
660 set_pte_at(mm, addr, ptep, __pte(0));
663 static inline void pmd_clear(pmd_t *pmdp)
665 set_pmd(pmdp, __pmd(0));
667 #endif /* CONFIG_X86_PAE */
669 #define __HAVE_ARCH_START_CONTEXT_SWITCH
670 static inline void arch_start_context_switch(struct task_struct *prev)
672 PVOP_VCALL1(pv_cpu_ops.start_context_switch, prev);
675 static inline void arch_end_context_switch(struct task_struct *next)
677 PVOP_VCALL1(pv_cpu_ops.end_context_switch, next);
680 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
681 static inline void arch_enter_lazy_mmu_mode(void)
683 PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
686 static inline void arch_leave_lazy_mmu_mode(void)
688 PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
691 static inline void arch_flush_lazy_mmu_mode(void)
693 PVOP_VCALL0(pv_mmu_ops.lazy_mode.flush);
696 static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
697 phys_addr_t phys, pgprot_t flags)
699 pv_mmu_ops.set_fixmap(idx, phys, flags);
702 #if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS)
704 static __always_inline void pv_queued_spin_lock_slowpath(struct qspinlock *lock,
707 PVOP_VCALL2(pv_lock_ops.queued_spin_lock_slowpath, lock, val);
710 static __always_inline void pv_queued_spin_unlock(struct qspinlock *lock)
712 PVOP_VCALLEE1(pv_lock_ops.queued_spin_unlock, lock);
715 static __always_inline void pv_wait(u8 *ptr, u8 val)
717 PVOP_VCALL2(pv_lock_ops.wait, ptr, val);
720 static __always_inline void pv_kick(int cpu)
722 PVOP_VCALL1(pv_lock_ops.kick, cpu);
725 static __always_inline bool pv_vcpu_is_preempted(long cpu)
727 return PVOP_CALLEE1(bool, pv_lock_ops.vcpu_is_preempted, cpu);
730 #endif /* SMP && PARAVIRT_SPINLOCKS */
733 #define PV_SAVE_REGS "pushl %ecx; pushl %edx;"
734 #define PV_RESTORE_REGS "popl %edx; popl %ecx;"
736 /* save and restore all caller-save registers, except return value */
737 #define PV_SAVE_ALL_CALLER_REGS "pushl %ecx;"
738 #define PV_RESTORE_ALL_CALLER_REGS "popl %ecx;"
740 #define PV_FLAGS_ARG "0"
741 #define PV_EXTRA_CLOBBERS
742 #define PV_VEXTRA_CLOBBERS
744 /* save and restore all caller-save registers, except return value */
745 #define PV_SAVE_ALL_CALLER_REGS \
754 #define PV_RESTORE_ALL_CALLER_REGS \
764 /* We save some registers, but all of them, that's too much. We clobber all
765 * caller saved registers but the argument parameter */
766 #define PV_SAVE_REGS "pushq %%rdi;"
767 #define PV_RESTORE_REGS "popq %%rdi;"
768 #define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx", "rsi"
769 #define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx", "rsi"
770 #define PV_FLAGS_ARG "D"
774 * Generate a thunk around a function which saves all caller-save
775 * registers except for the return value. This allows C functions to
776 * be called from assembler code where fewer than normal registers are
777 * available. It may also help code generation around calls from C
778 * code if the common case doesn't use many registers.
780 * When a callee is wrapped in a thunk, the caller can assume that all
781 * arg regs and all scratch registers are preserved across the
782 * call. The return value in rax/eax will not be saved, even for void
785 #define PV_THUNK_NAME(func) "__raw_callee_save_" #func
786 #define PV_CALLEE_SAVE_REGS_THUNK(func) \
787 extern typeof(func) __raw_callee_save_##func; \
789 asm(".pushsection .text;" \
790 ".globl " PV_THUNK_NAME(func) ";" \
791 ".type " PV_THUNK_NAME(func) ", @function;" \
792 PV_THUNK_NAME(func) ":" \
794 PV_SAVE_ALL_CALLER_REGS \
796 PV_RESTORE_ALL_CALLER_REGS \
801 /* Get a reference to a callee-save function */
802 #define PV_CALLEE_SAVE(func) \
803 ((struct paravirt_callee_save) { __raw_callee_save_##func })
805 /* Promise that "func" already uses the right calling convention */
806 #define __PV_IS_CALLEE_SAVE(func) \
807 ((struct paravirt_callee_save) { func })
809 static inline notrace unsigned long arch_local_save_flags(void)
811 return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl);
814 static inline notrace void arch_local_irq_restore(unsigned long f)
816 PVOP_VCALLEE1(pv_irq_ops.restore_fl, f);
819 static inline notrace void arch_local_irq_disable(void)
821 PVOP_VCALLEE0(pv_irq_ops.irq_disable);
824 static inline notrace void arch_local_irq_enable(void)
826 PVOP_VCALLEE0(pv_irq_ops.irq_enable);
829 static inline notrace unsigned long arch_local_irq_save(void)
833 f = arch_local_save_flags();
834 arch_local_irq_disable();
839 /* Make sure as little as possible of this mess escapes. */
854 extern void default_banner(void);
856 #else /* __ASSEMBLY__ */
858 #define _PVSITE(ptype, clobbers, ops, word, algn) \
862 .pushsection .parainstructions,"a"; \
871 #define COND_PUSH(set, mask, reg) \
872 .if ((~(set)) & mask); push %reg; .endif
873 #define COND_POP(set, mask, reg) \
874 .if ((~(set)) & mask); pop %reg; .endif
878 #define PV_SAVE_REGS(set) \
879 COND_PUSH(set, CLBR_RAX, rax); \
880 COND_PUSH(set, CLBR_RCX, rcx); \
881 COND_PUSH(set, CLBR_RDX, rdx); \
882 COND_PUSH(set, CLBR_RSI, rsi); \
883 COND_PUSH(set, CLBR_RDI, rdi); \
884 COND_PUSH(set, CLBR_R8, r8); \
885 COND_PUSH(set, CLBR_R9, r9); \
886 COND_PUSH(set, CLBR_R10, r10); \
887 COND_PUSH(set, CLBR_R11, r11)
888 #define PV_RESTORE_REGS(set) \
889 COND_POP(set, CLBR_R11, r11); \
890 COND_POP(set, CLBR_R10, r10); \
891 COND_POP(set, CLBR_R9, r9); \
892 COND_POP(set, CLBR_R8, r8); \
893 COND_POP(set, CLBR_RDI, rdi); \
894 COND_POP(set, CLBR_RSI, rsi); \
895 COND_POP(set, CLBR_RDX, rdx); \
896 COND_POP(set, CLBR_RCX, rcx); \
897 COND_POP(set, CLBR_RAX, rax)
899 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8)
900 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8)
901 #define PARA_INDIRECT(addr) *addr(%rip)
903 #define PV_SAVE_REGS(set) \
904 COND_PUSH(set, CLBR_EAX, eax); \
905 COND_PUSH(set, CLBR_EDI, edi); \
906 COND_PUSH(set, CLBR_ECX, ecx); \
907 COND_PUSH(set, CLBR_EDX, edx)
908 #define PV_RESTORE_REGS(set) \
909 COND_POP(set, CLBR_EDX, edx); \
910 COND_POP(set, CLBR_ECX, ecx); \
911 COND_POP(set, CLBR_EDI, edi); \
912 COND_POP(set, CLBR_EAX, eax)
914 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4)
915 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4)
916 #define PARA_INDIRECT(addr) *%cs:addr
919 #define INTERRUPT_RETURN \
920 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \
921 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_iret))
923 #define DISABLE_INTERRUPTS(clobbers) \
924 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
925 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
926 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_disable); \
927 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
929 #define ENABLE_INTERRUPTS(clobbers) \
930 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \
931 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
932 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_enable); \
933 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
936 #define GET_CR0_INTO_EAX \
937 push %ecx; push %edx; \
938 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_read_cr0); \
940 #else /* !CONFIG_X86_32 */
943 * If swapgs is used while the userspace stack is still current,
944 * there's no way to call a pvop. The PV replacement *must* be
945 * inlined, or the swapgs instruction must be trapped and emulated.
947 #define SWAPGS_UNSAFE_STACK \
948 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
952 * Note: swapgs is very special, and in practise is either going to be
953 * implemented with a single "swapgs" instruction or something very
954 * special. Either way, we don't need to save any registers for
958 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
959 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_swapgs) \
962 #define GET_CR2_INTO_RAX \
963 call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2)
965 #define PARAVIRT_ADJUST_EXCEPTION_FRAME \
966 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_adjust_exception_frame), \
968 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_adjust_exception_frame))
970 #define USERGS_SYSRET64 \
971 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \
973 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret64))
974 #endif /* CONFIG_X86_32 */
976 #endif /* __ASSEMBLY__ */
977 #else /* CONFIG_PARAVIRT */
978 # define default_banner x86_init_noop
980 static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm,
981 struct mm_struct *mm)
985 static inline void paravirt_arch_exit_mmap(struct mm_struct *mm)
988 #endif /* __ASSEMBLY__ */
989 #endif /* !CONFIG_PARAVIRT */
990 #endif /* _ASM_X86_PARAVIRT_H */