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>
17 static inline int paravirt_enabled(void)
19 return pv_info.paravirt_enabled;
22 static inline void load_sp0(struct tss_struct *tss,
23 struct thread_struct *thread)
25 PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
28 /* The paravirtualized CPUID instruction. */
29 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
30 unsigned int *ecx, unsigned int *edx)
32 PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
36 * These special macros can be used to get or set a debugging register
38 static inline unsigned long paravirt_get_debugreg(int reg)
40 return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
42 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
43 static inline void set_debugreg(unsigned long val, int reg)
45 PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
48 static inline void clts(void)
50 PVOP_VCALL0(pv_cpu_ops.clts);
53 static inline unsigned long read_cr0(void)
55 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
58 static inline void write_cr0(unsigned long x)
60 PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
63 static inline unsigned long read_cr2(void)
65 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
68 static inline void write_cr2(unsigned long x)
70 PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
73 static inline unsigned long read_cr3(void)
75 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
78 static inline void write_cr3(unsigned long x)
80 PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
83 static inline unsigned long __read_cr4(void)
85 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
87 static inline unsigned long __read_cr4_safe(void)
89 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
92 static inline void __write_cr4(unsigned long x)
94 PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
98 static inline unsigned long read_cr8(void)
100 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
103 static inline void write_cr8(unsigned long x)
105 PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
109 static inline void arch_safe_halt(void)
111 PVOP_VCALL0(pv_irq_ops.safe_halt);
114 static inline void halt(void)
116 PVOP_VCALL0(pv_irq_ops.halt);
119 static inline void wbinvd(void)
121 PVOP_VCALL0(pv_cpu_ops.wbinvd);
124 #define get_kernel_rpl() (pv_info.kernel_rpl)
126 static inline u64 paravirt_read_msr(unsigned msr, int *err)
128 return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
131 static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
133 return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
136 /* These should all do BUG_ON(_err), but our headers are too tangled. */
137 #define rdmsr(msr, val1, val2) \
140 u64 _l = paravirt_read_msr(msr, &_err); \
145 #define wrmsr(msr, val1, val2) \
147 paravirt_write_msr(msr, val1, val2); \
150 #define rdmsrl(msr, val) \
153 val = paravirt_read_msr(msr, &_err); \
156 #define wrmsrl(msr, val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
157 #define wrmsr_safe(msr, a, b) paravirt_write_msr(msr, a, b)
159 /* rdmsr with exception handling */
160 #define rdmsr_safe(msr, a, b) \
163 u64 _l = paravirt_read_msr(msr, &_err); \
169 static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
173 *p = paravirt_read_msr(msr, &err);
177 static inline u64 paravirt_read_tsc(void)
179 return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
182 #define rdtscl(low) \
184 u64 _l = paravirt_read_tsc(); \
188 #define rdtscll(val) (val = paravirt_read_tsc())
190 static inline unsigned long long paravirt_sched_clock(void)
192 return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
196 extern struct static_key paravirt_steal_enabled;
197 extern struct static_key paravirt_steal_rq_enabled;
199 static inline u64 paravirt_steal_clock(int cpu)
201 return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu);
204 static inline unsigned long long paravirt_read_pmc(int counter)
206 return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
209 #define rdpmc(counter, low, high) \
211 u64 _l = paravirt_read_pmc(counter); \
216 #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter))
218 static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
220 return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
223 #define rdtscp(low, high, aux) \
226 unsigned long __val = paravirt_rdtscp(&__aux); \
227 (low) = (u32)__val; \
228 (high) = (u32)(__val >> 32); \
232 #define rdtscpll(val, aux) \
234 unsigned long __aux; \
235 val = paravirt_rdtscp(&__aux); \
239 static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
241 PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries);
244 static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
246 PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries);
249 static inline void load_TR_desc(void)
251 PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
253 static inline void load_gdt(const struct desc_ptr *dtr)
255 PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
257 static inline void load_idt(const struct desc_ptr *dtr)
259 PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
261 static inline void set_ldt(const void *addr, unsigned entries)
263 PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
265 static inline void store_idt(struct desc_ptr *dtr)
267 PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
269 static inline unsigned long paravirt_store_tr(void)
271 return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
273 #define store_tr(tr) ((tr) = paravirt_store_tr())
274 static inline void load_TLS(struct thread_struct *t, unsigned cpu)
276 PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
280 static inline void load_gs_index(unsigned int gs)
282 PVOP_VCALL1(pv_cpu_ops.load_gs_index, gs);
286 static inline void write_ldt_entry(struct desc_struct *dt, int entry,
289 PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
292 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
293 void *desc, int type)
295 PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
298 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
300 PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
302 static inline void set_iopl_mask(unsigned mask)
304 PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
307 /* The paravirtualized I/O functions */
308 static inline void slow_down_io(void)
310 pv_cpu_ops.io_delay();
311 #ifdef REALLY_SLOW_IO
312 pv_cpu_ops.io_delay();
313 pv_cpu_ops.io_delay();
314 pv_cpu_ops.io_delay();
319 static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
320 unsigned long start_esp)
322 PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
323 phys_apicid, start_eip, start_esp);
327 static inline void paravirt_activate_mm(struct mm_struct *prev,
328 struct mm_struct *next)
330 PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
333 static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm,
334 struct mm_struct *mm)
336 PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
339 static inline void paravirt_arch_exit_mmap(struct mm_struct *mm)
341 PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
344 static inline void __flush_tlb(void)
346 PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
348 static inline void __flush_tlb_global(void)
350 PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
352 static inline void __flush_tlb_single(unsigned long addr)
354 PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
357 static inline void flush_tlb_others(const struct cpumask *cpumask,
358 struct mm_struct *mm,
362 PVOP_VCALL4(pv_mmu_ops.flush_tlb_others, cpumask, mm, start, end);
365 static inline int paravirt_pgd_alloc(struct mm_struct *mm)
367 return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm);
370 static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd)
372 PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd);
375 static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn)
377 PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn);
379 static inline void paravirt_release_pte(unsigned long pfn)
381 PVOP_VCALL1(pv_mmu_ops.release_pte, pfn);
384 static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn)
386 PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn);
389 static inline void paravirt_release_pmd(unsigned long pfn)
391 PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn);
394 static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn)
396 PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn);
398 static inline void paravirt_release_pud(unsigned long pfn)
400 PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
403 static inline void pte_update(struct mm_struct *mm, unsigned long addr,
406 PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
408 static inline void pmd_update(struct mm_struct *mm, unsigned long addr,
411 PVOP_VCALL3(pv_mmu_ops.pmd_update, mm, addr, pmdp);
414 static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
417 PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
420 static inline void pmd_update_defer(struct mm_struct *mm, unsigned long addr,
423 PVOP_VCALL3(pv_mmu_ops.pmd_update_defer, mm, addr, pmdp);
426 static inline pte_t __pte(pteval_t val)
430 if (sizeof(pteval_t) > sizeof(long))
431 ret = PVOP_CALLEE2(pteval_t,
433 val, (u64)val >> 32);
435 ret = PVOP_CALLEE1(pteval_t,
439 return (pte_t) { .pte = ret };
442 static inline pteval_t pte_val(pte_t pte)
446 if (sizeof(pteval_t) > sizeof(long))
447 ret = PVOP_CALLEE2(pteval_t, pv_mmu_ops.pte_val,
448 pte.pte, (u64)pte.pte >> 32);
450 ret = PVOP_CALLEE1(pteval_t, pv_mmu_ops.pte_val,
456 static inline pgd_t __pgd(pgdval_t val)
460 if (sizeof(pgdval_t) > sizeof(long))
461 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.make_pgd,
462 val, (u64)val >> 32);
464 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.make_pgd,
467 return (pgd_t) { ret };
470 static inline pgdval_t pgd_val(pgd_t pgd)
474 if (sizeof(pgdval_t) > sizeof(long))
475 ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.pgd_val,
476 pgd.pgd, (u64)pgd.pgd >> 32);
478 ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.pgd_val,
484 #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
485 static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
490 ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start,
493 return (pte_t) { .pte = ret };
496 static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
497 pte_t *ptep, pte_t pte)
499 if (sizeof(pteval_t) > sizeof(long))
501 pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte);
503 PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit,
504 mm, addr, ptep, pte.pte);
507 static inline void set_pte(pte_t *ptep, pte_t pte)
509 if (sizeof(pteval_t) > sizeof(long))
510 PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
511 pte.pte, (u64)pte.pte >> 32);
513 PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
517 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
518 pte_t *ptep, pte_t pte)
520 if (sizeof(pteval_t) > sizeof(long))
522 pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
524 PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
527 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
528 pmd_t *pmdp, pmd_t pmd)
530 if (sizeof(pmdval_t) > sizeof(long))
532 pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
534 PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp,
535 native_pmd_val(pmd));
538 static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
540 pmdval_t val = native_pmd_val(pmd);
542 if (sizeof(pmdval_t) > sizeof(long))
543 PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
545 PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
548 #if CONFIG_PGTABLE_LEVELS >= 3
549 static inline pmd_t __pmd(pmdval_t val)
553 if (sizeof(pmdval_t) > sizeof(long))
554 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.make_pmd,
555 val, (u64)val >> 32);
557 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.make_pmd,
560 return (pmd_t) { ret };
563 static inline pmdval_t pmd_val(pmd_t pmd)
567 if (sizeof(pmdval_t) > sizeof(long))
568 ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.pmd_val,
569 pmd.pmd, (u64)pmd.pmd >> 32);
571 ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.pmd_val,
577 static inline void set_pud(pud_t *pudp, pud_t pud)
579 pudval_t val = native_pud_val(pud);
581 if (sizeof(pudval_t) > sizeof(long))
582 PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
583 val, (u64)val >> 32);
585 PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
588 #if CONFIG_PGTABLE_LEVELS == 4
589 static inline pud_t __pud(pudval_t val)
593 if (sizeof(pudval_t) > sizeof(long))
594 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.make_pud,
595 val, (u64)val >> 32);
597 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.make_pud,
600 return (pud_t) { ret };
603 static inline pudval_t pud_val(pud_t pud)
607 if (sizeof(pudval_t) > sizeof(long))
608 ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.pud_val,
609 pud.pud, (u64)pud.pud >> 32);
611 ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.pud_val,
617 static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
619 pgdval_t val = native_pgd_val(pgd);
621 if (sizeof(pgdval_t) > sizeof(long))
622 PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp,
623 val, (u64)val >> 32);
625 PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp,
629 static inline void pgd_clear(pgd_t *pgdp)
631 set_pgd(pgdp, __pgd(0));
634 static inline void pud_clear(pud_t *pudp)
636 set_pud(pudp, __pud(0));
639 #endif /* CONFIG_PGTABLE_LEVELS == 4 */
641 #endif /* CONFIG_PGTABLE_LEVELS >= 3 */
643 #ifdef CONFIG_X86_PAE
644 /* Special-case pte-setting operations for PAE, which can't update a
645 64-bit pte atomically */
646 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
648 PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
649 pte.pte, pte.pte >> 32);
652 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
655 PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
658 static inline void pmd_clear(pmd_t *pmdp)
660 PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
662 #else /* !CONFIG_X86_PAE */
663 static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
668 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
671 set_pte_at(mm, addr, ptep, __pte(0));
674 static inline void pmd_clear(pmd_t *pmdp)
676 set_pmd(pmdp, __pmd(0));
678 #endif /* CONFIG_X86_PAE */
680 #define __HAVE_ARCH_START_CONTEXT_SWITCH
681 static inline void arch_start_context_switch(struct task_struct *prev)
683 PVOP_VCALL1(pv_cpu_ops.start_context_switch, prev);
686 static inline void arch_end_context_switch(struct task_struct *next)
688 PVOP_VCALL1(pv_cpu_ops.end_context_switch, next);
691 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
692 static inline void arch_enter_lazy_mmu_mode(void)
694 PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
697 static inline void arch_leave_lazy_mmu_mode(void)
699 PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
702 static inline void arch_flush_lazy_mmu_mode(void)
704 PVOP_VCALL0(pv_mmu_ops.lazy_mode.flush);
707 static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
708 phys_addr_t phys, pgprot_t flags)
710 pv_mmu_ops.set_fixmap(idx, phys, flags);
713 #if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS)
715 #ifdef CONFIG_QUEUED_SPINLOCKS
717 static __always_inline void pv_queued_spin_lock_slowpath(struct qspinlock *lock,
720 PVOP_VCALL2(pv_lock_ops.queued_spin_lock_slowpath, lock, val);
723 static __always_inline void pv_queued_spin_unlock(struct qspinlock *lock)
725 PVOP_VCALLEE1(pv_lock_ops.queued_spin_unlock, lock);
728 static __always_inline void pv_wait(u8 *ptr, u8 val)
730 PVOP_VCALL2(pv_lock_ops.wait, ptr, val);
733 static __always_inline void pv_kick(int cpu)
735 PVOP_VCALL1(pv_lock_ops.kick, cpu);
738 #else /* !CONFIG_QUEUED_SPINLOCKS */
740 static __always_inline void __ticket_lock_spinning(struct arch_spinlock *lock,
743 PVOP_VCALLEE2(pv_lock_ops.lock_spinning, lock, ticket);
746 static __always_inline void __ticket_unlock_kick(struct arch_spinlock *lock,
749 PVOP_VCALL2(pv_lock_ops.unlock_kick, lock, ticket);
752 #endif /* CONFIG_QUEUED_SPINLOCKS */
754 #endif /* SMP && PARAVIRT_SPINLOCKS */
757 #define PV_SAVE_REGS "pushl %ecx; pushl %edx;"
758 #define PV_RESTORE_REGS "popl %edx; popl %ecx;"
760 /* save and restore all caller-save registers, except return value */
761 #define PV_SAVE_ALL_CALLER_REGS "pushl %ecx;"
762 #define PV_RESTORE_ALL_CALLER_REGS "popl %ecx;"
764 #define PV_FLAGS_ARG "0"
765 #define PV_EXTRA_CLOBBERS
766 #define PV_VEXTRA_CLOBBERS
768 /* save and restore all caller-save registers, except return value */
769 #define PV_SAVE_ALL_CALLER_REGS \
778 #define PV_RESTORE_ALL_CALLER_REGS \
788 /* We save some registers, but all of them, that's too much. We clobber all
789 * caller saved registers but the argument parameter */
790 #define PV_SAVE_REGS "pushq %%rdi;"
791 #define PV_RESTORE_REGS "popq %%rdi;"
792 #define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx", "rsi"
793 #define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx", "rsi"
794 #define PV_FLAGS_ARG "D"
798 * Generate a thunk around a function which saves all caller-save
799 * registers except for the return value. This allows C functions to
800 * be called from assembler code where fewer than normal registers are
801 * available. It may also help code generation around calls from C
802 * code if the common case doesn't use many registers.
804 * When a callee is wrapped in a thunk, the caller can assume that all
805 * arg regs and all scratch registers are preserved across the
806 * call. The return value in rax/eax will not be saved, even for void
809 #define PV_CALLEE_SAVE_REGS_THUNK(func) \
810 extern typeof(func) __raw_callee_save_##func; \
812 asm(".pushsection .text;" \
813 ".globl __raw_callee_save_" #func " ; " \
814 "__raw_callee_save_" #func ": " \
815 PV_SAVE_ALL_CALLER_REGS \
817 PV_RESTORE_ALL_CALLER_REGS \
821 /* Get a reference to a callee-save function */
822 #define PV_CALLEE_SAVE(func) \
823 ((struct paravirt_callee_save) { __raw_callee_save_##func })
825 /* Promise that "func" already uses the right calling convention */
826 #define __PV_IS_CALLEE_SAVE(func) \
827 ((struct paravirt_callee_save) { func })
829 static inline notrace unsigned long arch_local_save_flags(void)
831 return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl);
834 static inline notrace void arch_local_irq_restore(unsigned long f)
836 PVOP_VCALLEE1(pv_irq_ops.restore_fl, f);
839 static inline notrace void arch_local_irq_disable(void)
841 PVOP_VCALLEE0(pv_irq_ops.irq_disable);
844 static inline notrace void arch_local_irq_enable(void)
846 PVOP_VCALLEE0(pv_irq_ops.irq_enable);
849 static inline notrace unsigned long arch_local_irq_save(void)
853 f = arch_local_save_flags();
854 arch_local_irq_disable();
859 /* Make sure as little as possible of this mess escapes. */
874 extern void default_banner(void);
876 #else /* __ASSEMBLY__ */
878 #define _PVSITE(ptype, clobbers, ops, word, algn) \
882 .pushsection .parainstructions,"a"; \
891 #define COND_PUSH(set, mask, reg) \
892 .if ((~(set)) & mask); push %reg; .endif
893 #define COND_POP(set, mask, reg) \
894 .if ((~(set)) & mask); pop %reg; .endif
898 #define PV_SAVE_REGS(set) \
899 COND_PUSH(set, CLBR_RAX, rax); \
900 COND_PUSH(set, CLBR_RCX, rcx); \
901 COND_PUSH(set, CLBR_RDX, rdx); \
902 COND_PUSH(set, CLBR_RSI, rsi); \
903 COND_PUSH(set, CLBR_RDI, rdi); \
904 COND_PUSH(set, CLBR_R8, r8); \
905 COND_PUSH(set, CLBR_R9, r9); \
906 COND_PUSH(set, CLBR_R10, r10); \
907 COND_PUSH(set, CLBR_R11, r11)
908 #define PV_RESTORE_REGS(set) \
909 COND_POP(set, CLBR_R11, r11); \
910 COND_POP(set, CLBR_R10, r10); \
911 COND_POP(set, CLBR_R9, r9); \
912 COND_POP(set, CLBR_R8, r8); \
913 COND_POP(set, CLBR_RDI, rdi); \
914 COND_POP(set, CLBR_RSI, rsi); \
915 COND_POP(set, CLBR_RDX, rdx); \
916 COND_POP(set, CLBR_RCX, rcx); \
917 COND_POP(set, CLBR_RAX, rax)
919 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8)
920 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8)
921 #define PARA_INDIRECT(addr) *addr(%rip)
923 #define PV_SAVE_REGS(set) \
924 COND_PUSH(set, CLBR_EAX, eax); \
925 COND_PUSH(set, CLBR_EDI, edi); \
926 COND_PUSH(set, CLBR_ECX, ecx); \
927 COND_PUSH(set, CLBR_EDX, edx)
928 #define PV_RESTORE_REGS(set) \
929 COND_POP(set, CLBR_EDX, edx); \
930 COND_POP(set, CLBR_ECX, ecx); \
931 COND_POP(set, CLBR_EDI, edi); \
932 COND_POP(set, CLBR_EAX, eax)
934 #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4)
935 #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4)
936 #define PARA_INDIRECT(addr) *%cs:addr
939 #define INTERRUPT_RETURN \
940 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \
941 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_iret))
943 #define DISABLE_INTERRUPTS(clobbers) \
944 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
945 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
946 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_disable); \
947 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
949 #define ENABLE_INTERRUPTS(clobbers) \
950 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \
951 PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \
952 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_enable); \
953 PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
955 #define USERGS_SYSRET32 \
956 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret32), \
958 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret32))
961 #define GET_CR0_INTO_EAX \
962 push %ecx; push %edx; \
963 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_read_cr0); \
966 #define ENABLE_INTERRUPTS_SYSEXIT \
967 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), \
969 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_irq_enable_sysexit))
972 #else /* !CONFIG_X86_32 */
975 * If swapgs is used while the userspace stack is still current,
976 * there's no way to call a pvop. The PV replacement *must* be
977 * inlined, or the swapgs instruction must be trapped and emulated.
979 #define SWAPGS_UNSAFE_STACK \
980 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
984 * Note: swapgs is very special, and in practise is either going to be
985 * implemented with a single "swapgs" instruction or something very
986 * special. Either way, we don't need to save any registers for
990 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
991 call PARA_INDIRECT(pv_cpu_ops+PV_CPU_swapgs) \
994 #define GET_CR2_INTO_RAX \
995 call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2)
997 #define PARAVIRT_ADJUST_EXCEPTION_FRAME \
998 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_adjust_exception_frame), \
1000 call PARA_INDIRECT(pv_irq_ops+PV_IRQ_adjust_exception_frame))
1002 #define USERGS_SYSRET64 \
1003 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \
1005 jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret64))
1006 #endif /* CONFIG_X86_32 */
1008 #endif /* __ASSEMBLY__ */
1009 #else /* CONFIG_PARAVIRT */
1010 # define default_banner x86_init_noop
1011 #ifndef __ASSEMBLY__
1012 static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm,
1013 struct mm_struct *mm)
1017 static inline void paravirt_arch_exit_mmap(struct mm_struct *mm)
1020 #endif /* __ASSEMBLY__ */
1021 #endif /* !CONFIG_PARAVIRT */
1022 #endif /* _ASM_X86_PARAVIRT_H */