1 #ifndef __ASM_PARAVIRT_H
2 #define __ASM_PARAVIRT_H
3 /* Various instructions on x86 need to be replaced for
4 * para-virtualization: those hooks are defined here. */
9 /* Bitmask of what can be clobbered: usually at least eax. */
17 #include <linux/types.h>
18 #include <linux/cpumask.h>
19 #include <asm/kmap_types.h>
23 struct Xgt_desc_struct
;
28 /* Lazy mode for batching updates / context switch */
29 enum paravirt_lazy_mode
{
30 PARAVIRT_LAZY_NONE
= 0,
31 PARAVIRT_LAZY_MMU
= 1,
32 PARAVIRT_LAZY_CPU
= 2,
33 PARAVIRT_LAZY_FLUSH
= 3,
38 unsigned int kernel_rpl
;
39 int shared_kernel_pmd
;
44 * Patch may replace one of the defined code sequences with arbitrary
45 * code, subject to the same register constraints. This generally
46 * means the code is not free to clobber any registers other than EAX.
47 * The patch function should return the number of bytes of code
48 * generated, as we nop pad the rest in generic code.
50 unsigned (*patch
)(u8 type
, u16 clobber
, void *firstinsn
, unsigned len
);
52 /* Basic arch-specific setup */
53 void (*arch_setup
)(void);
54 char *(*memory_setup
)(void);
55 void (*post_allocator_init
)(void);
57 void (*init_IRQ
)(void);
58 void (*time_init
)(void);
61 * Called before/after init_mm pagetable setup. setup_start
62 * may reset %cr3, and may pre-install parts of the pagetable;
63 * pagetable setup is expected to preserve any existing
66 void (*pagetable_setup_start
)(pgd_t
*pgd_base
);
67 void (*pagetable_setup_done
)(pgd_t
*pgd_base
);
69 /* Print a banner to identify the environment */
72 /* Set and set time of day */
73 unsigned long (*get_wallclock
)(void);
74 int (*set_wallclock
)(unsigned long);
76 /* cpuid emulation, mostly so that caps bits can be disabled */
77 void (*cpuid
)(unsigned int *eax
, unsigned int *ebx
,
78 unsigned int *ecx
, unsigned int *edx
);
80 /* hooks for various privileged instructions */
81 unsigned long (*get_debugreg
)(int regno
);
82 void (*set_debugreg
)(int regno
, unsigned long value
);
86 unsigned long (*read_cr0
)(void);
87 void (*write_cr0
)(unsigned long);
89 unsigned long (*read_cr2
)(void);
90 void (*write_cr2
)(unsigned long);
92 unsigned long (*read_cr3
)(void);
93 void (*write_cr3
)(unsigned long);
95 unsigned long (*read_cr4_safe
)(void);
96 unsigned long (*read_cr4
)(void);
97 void (*write_cr4
)(unsigned long);
100 * Get/set interrupt state. save_fl and restore_fl are only
101 * expected to use X86_EFLAGS_IF; all other bits
102 * returned from save_fl are undefined, and may be ignored by
105 unsigned long (*save_fl
)(void);
106 void (*restore_fl
)(unsigned long);
107 void (*irq_disable
)(void);
108 void (*irq_enable
)(void);
109 void (*safe_halt
)(void);
112 void (*wbinvd
)(void);
114 /* MSR, PMC and TSR operations.
115 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
116 u64 (*read_msr
)(unsigned int msr
, int *err
);
117 int (*write_msr
)(unsigned int msr
, u64 val
);
119 u64 (*read_tsc
)(void);
120 u64 (*read_pmc
)(void);
121 unsigned long long (*sched_clock
)(void);
122 unsigned long (*get_cpu_khz
)(void);
124 /* Segment descriptor handling */
125 void (*load_tr_desc
)(void);
126 void (*load_gdt
)(const struct Xgt_desc_struct
*);
127 void (*load_idt
)(const struct Xgt_desc_struct
*);
128 void (*store_gdt
)(struct Xgt_desc_struct
*);
129 void (*store_idt
)(struct Xgt_desc_struct
*);
130 void (*set_ldt
)(const void *desc
, unsigned entries
);
131 unsigned long (*store_tr
)(void);
132 void (*load_tls
)(struct thread_struct
*t
, unsigned int cpu
);
133 void (*write_ldt_entry
)(struct desc_struct
*,
134 int entrynum
, u32 low
, u32 high
);
135 void (*write_gdt_entry
)(struct desc_struct
*,
136 int entrynum
, u32 low
, u32 high
);
137 void (*write_idt_entry
)(struct desc_struct
*,
138 int entrynum
, u32 low
, u32 high
);
139 void (*load_esp0
)(struct tss_struct
*tss
, struct thread_struct
*t
);
141 void (*set_iopl_mask
)(unsigned mask
);
142 void (*io_delay
)(void);
145 * Hooks for intercepting the creation/use/destruction of an
148 void (*activate_mm
)(struct mm_struct
*prev
,
149 struct mm_struct
*next
);
150 void (*dup_mmap
)(struct mm_struct
*oldmm
,
151 struct mm_struct
*mm
);
152 void (*exit_mmap
)(struct mm_struct
*mm
);
154 #ifdef CONFIG_X86_LOCAL_APIC
156 * Direct APIC operations, principally for VMI. Ideally
157 * these shouldn't be in this interface.
159 void (*apic_write
)(unsigned long reg
, unsigned long v
);
160 void (*apic_write_atomic
)(unsigned long reg
, unsigned long v
);
161 unsigned long (*apic_read
)(unsigned long reg
);
162 void (*setup_boot_clock
)(void);
163 void (*setup_secondary_clock
)(void);
165 void (*startup_ipi_hook
)(int phys_apicid
,
166 unsigned long start_eip
,
167 unsigned long start_esp
);
171 void (*flush_tlb_user
)(void);
172 void (*flush_tlb_kernel
)(void);
173 void (*flush_tlb_single
)(unsigned long addr
);
174 void (*flush_tlb_others
)(const cpumask_t
*cpus
, struct mm_struct
*mm
,
177 /* Hooks for allocating/releasing pagetable pages */
178 void (*alloc_pt
)(struct mm_struct
*mm
, u32 pfn
);
179 void (*alloc_pd
)(u32 pfn
);
180 void (*alloc_pd_clone
)(u32 pfn
, u32 clonepfn
, u32 start
, u32 count
);
181 void (*release_pt
)(u32 pfn
);
182 void (*release_pd
)(u32 pfn
);
184 /* Pagetable manipulation functions */
185 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
186 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
187 pte_t
*ptep
, pte_t pteval
);
188 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
189 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
);
190 void (*pte_update_defer
)(struct mm_struct
*mm
,
191 unsigned long addr
, pte_t
*ptep
);
193 #ifdef CONFIG_HIGHPTE
194 void *(*kmap_atomic_pte
)(struct page
*page
, enum km_type type
);
197 #ifdef CONFIG_X86_PAE
198 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
199 void (*set_pte_present
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
, pte_t pte
);
200 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
201 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
);
202 void (*pmd_clear
)(pmd_t
*pmdp
);
204 unsigned long long (*pte_val
)(pte_t
);
205 unsigned long long (*pmd_val
)(pmd_t
);
206 unsigned long long (*pgd_val
)(pgd_t
);
208 pte_t (*make_pte
)(unsigned long long pte
);
209 pmd_t (*make_pmd
)(unsigned long long pmd
);
210 pgd_t (*make_pgd
)(unsigned long long pgd
);
212 unsigned long (*pte_val
)(pte_t
);
213 unsigned long (*pgd_val
)(pgd_t
);
215 pte_t (*make_pte
)(unsigned long pte
);
216 pgd_t (*make_pgd
)(unsigned long pgd
);
219 /* Set deferred update mode, used for batching operations. */
220 void (*set_lazy_mode
)(enum paravirt_lazy_mode mode
);
222 /* These two are jmp to, not actually called. */
223 void (*irq_enable_sysexit
)(void);
227 extern struct paravirt_ops paravirt_ops
;
229 #define PARAVIRT_PATCH(x) \
230 (offsetof(struct paravirt_ops, x) / sizeof(void *))
232 #define paravirt_type(type) \
233 [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
234 #define paravirt_clobber(clobber) \
235 [paravirt_clobber] "i" (clobber)
238 * Generate some code, and mark it as patchable by the
239 * apply_paravirt() alternate instruction patcher.
241 #define _paravirt_alt(insn_string, type, clobber) \
242 "771:\n\t" insn_string "\n" "772:\n" \
243 ".pushsection .parainstructions,\"a\"\n" \
245 " .byte " type "\n" \
246 " .byte 772b-771b\n" \
247 " .short " clobber "\n" \
250 /* Generate patchable code, with the default asm parameters. */
251 #define paravirt_alt(insn_string) \
252 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
254 unsigned paravirt_patch_nop(void);
255 unsigned paravirt_patch_ignore(unsigned len
);
256 unsigned paravirt_patch_call(void *target
, u16 tgt_clobbers
,
257 void *site
, u16 site_clobbers
,
259 unsigned paravirt_patch_jmp(void *target
, void *site
, unsigned len
);
260 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *site
, unsigned len
);
262 unsigned paravirt_patch_insns(void *site
, unsigned len
,
263 const char *start
, const char *end
);
265 int paravirt_disable_iospace(void);
268 * This generates an indirect call based on the operation type number.
269 * The type number, computed in PARAVIRT_PATCH, is derived from the
270 * offset into the paravirt_ops structure, and can therefore be freely
271 * converted back into a structure offset.
273 #define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);"
276 * These macros are intended to wrap calls into a paravirt_ops
277 * operation, so that they can be later identified and patched at
280 * Normally, a call to a pv_op function is a simple indirect call:
281 * (paravirt_ops.operations)(args...).
283 * Unfortunately, this is a relatively slow operation for modern CPUs,
284 * because it cannot necessarily determine what the destination
285 * address is. In this case, the address is a runtime constant, so at
286 * the very least we can patch the call to e a simple direct call, or
287 * ideally, patch an inline implementation into the callsite. (Direct
288 * calls are essentially free, because the call and return addresses
289 * are completely predictable.)
291 * These macros rely on the standard gcc "regparm(3)" calling
292 * convention, in which the first three arguments are placed in %eax,
293 * %edx, %ecx (in that order), and the remaining arguments are placed
294 * on the stack. All caller-save registers (eax,edx,ecx) are expected
295 * to be modified (either clobbered or used for return values).
297 * The call instruction itself is marked by placing its start address
298 * and size into the .parainstructions section, so that
299 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
300 * appropriate patching under the control of the backend paravirt_ops
303 * Unfortunately there's no way to get gcc to generate the args setup
304 * for the call, and then allow the call itself to be generated by an
305 * inline asm. Because of this, we must do the complete arg setup and
306 * return value handling from within these macros. This is fairly
309 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
310 * It could be extended to more arguments, but there would be little
311 * to be gained from that. For each number of arguments, there are
312 * the two VCALL and CALL variants for void and non-void functions.
314 * When there is a return value, the invoker of the macro must specify
315 * the return type. The macro then uses sizeof() on that type to
316 * determine whether its a 32 or 64 bit value, and places the return
317 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
320 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
323 * Small structures are passed and returned in registers. The macro
324 * calling convention can't directly deal with this, so the wrapper
325 * functions must do this.
327 * These PVOP_* macros are only defined within this header. This
328 * means that all uses must be wrapped in inline functions. This also
329 * makes sure the incoming and outgoing types are always correct.
331 #define __PVOP_CALL(rettype, op, pre, post, ...) \
334 unsigned long __eax, __edx, __ecx; \
335 if (sizeof(rettype) > sizeof(unsigned long)) { \
337 paravirt_alt(PARAVIRT_CALL) \
339 : "=a" (__eax), "=d" (__edx), \
341 : paravirt_type(op), \
342 paravirt_clobber(CLBR_ANY), \
345 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
348 paravirt_alt(PARAVIRT_CALL) \
350 : "=a" (__eax), "=d" (__edx), \
352 : paravirt_type(op), \
353 paravirt_clobber(CLBR_ANY), \
356 __ret = (rettype)__eax; \
360 #define __PVOP_VCALL(op, pre, post, ...) \
362 unsigned long __eax, __edx, __ecx; \
364 paravirt_alt(PARAVIRT_CALL) \
366 : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
367 : paravirt_type(op), \
368 paravirt_clobber(CLBR_ANY), \
373 #define PVOP_CALL0(rettype, op) \
374 __PVOP_CALL(rettype, op, "", "")
375 #define PVOP_VCALL0(op) \
376 __PVOP_VCALL(op, "", "")
378 #define PVOP_CALL1(rettype, op, arg1) \
379 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)))
380 #define PVOP_VCALL1(op, arg1) \
381 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)))
383 #define PVOP_CALL2(rettype, op, arg1, arg2) \
384 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
385 #define PVOP_VCALL2(op, arg1, arg2) \
386 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
388 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
389 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), \
390 "1"((u32)(arg2)), "2"((u32)(arg3)))
391 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
392 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1"((u32)(arg2)), \
395 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
396 __PVOP_CALL(rettype, op, \
397 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
398 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
399 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
400 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
402 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
403 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
404 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
406 static inline int paravirt_enabled(void)
408 return paravirt_ops
.paravirt_enabled
;
411 static inline void load_esp0(struct tss_struct
*tss
,
412 struct thread_struct
*thread
)
414 PVOP_VCALL2(load_esp0
, tss
, thread
);
417 #define ARCH_SETUP paravirt_ops.arch_setup();
418 static inline unsigned long get_wallclock(void)
420 return PVOP_CALL0(unsigned long, get_wallclock
);
423 static inline int set_wallclock(unsigned long nowtime
)
425 return PVOP_CALL1(int, set_wallclock
, nowtime
);
428 static inline void (*choose_time_init(void))(void)
430 return paravirt_ops
.time_init
;
433 /* The paravirtualized CPUID instruction. */
434 static inline void __cpuid(unsigned int *eax
, unsigned int *ebx
,
435 unsigned int *ecx
, unsigned int *edx
)
437 PVOP_VCALL4(cpuid
, eax
, ebx
, ecx
, edx
);
441 * These special macros can be used to get or set a debugging register
443 static inline unsigned long paravirt_get_debugreg(int reg
)
445 return PVOP_CALL1(unsigned long, get_debugreg
, reg
);
447 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
448 static inline void set_debugreg(unsigned long val
, int reg
)
450 PVOP_VCALL2(set_debugreg
, reg
, val
);
453 static inline void clts(void)
458 static inline unsigned long read_cr0(void)
460 return PVOP_CALL0(unsigned long, read_cr0
);
463 static inline void write_cr0(unsigned long x
)
465 PVOP_VCALL1(write_cr0
, x
);
468 static inline unsigned long read_cr2(void)
470 return PVOP_CALL0(unsigned long, read_cr2
);
473 static inline void write_cr2(unsigned long x
)
475 PVOP_VCALL1(write_cr2
, x
);
478 static inline unsigned long read_cr3(void)
480 return PVOP_CALL0(unsigned long, read_cr3
);
483 static inline void write_cr3(unsigned long x
)
485 PVOP_VCALL1(write_cr3
, x
);
488 static inline unsigned long read_cr4(void)
490 return PVOP_CALL0(unsigned long, read_cr4
);
492 static inline unsigned long read_cr4_safe(void)
494 return PVOP_CALL0(unsigned long, read_cr4_safe
);
497 static inline void write_cr4(unsigned long x
)
499 PVOP_VCALL1(write_cr4
, x
);
502 static inline void raw_safe_halt(void)
504 PVOP_VCALL0(safe_halt
);
507 static inline void halt(void)
509 PVOP_VCALL0(safe_halt
);
512 static inline void wbinvd(void)
517 #define get_kernel_rpl() (paravirt_ops.kernel_rpl)
519 static inline u64
paravirt_read_msr(unsigned msr
, int *err
)
521 return PVOP_CALL2(u64
, read_msr
, msr
, err
);
523 static inline int paravirt_write_msr(unsigned msr
, unsigned low
, unsigned high
)
525 return PVOP_CALL3(int, write_msr
, msr
, low
, high
);
528 /* These should all do BUG_ON(_err), but our headers are too tangled. */
529 #define rdmsr(msr,val1,val2) do { \
531 u64 _l = paravirt_read_msr(msr, &_err); \
536 #define wrmsr(msr,val1,val2) do { \
537 paravirt_write_msr(msr, val1, val2); \
540 #define rdmsrl(msr,val) do { \
542 val = paravirt_read_msr(msr, &_err); \
545 #define wrmsrl(msr,val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
546 #define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
548 /* rdmsr with exception handling */
549 #define rdmsr_safe(msr,a,b) ({ \
551 u64 _l = paravirt_read_msr(msr, &_err); \
557 static inline u64
paravirt_read_tsc(void)
559 return PVOP_CALL0(u64
, read_tsc
);
562 #define rdtscl(low) do { \
563 u64 _l = paravirt_read_tsc(); \
567 #define rdtscll(val) (val = paravirt_read_tsc())
569 static inline unsigned long long paravirt_sched_clock(void)
571 return PVOP_CALL0(unsigned long long, sched_clock
);
573 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
575 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
577 static inline unsigned long long paravirt_read_pmc(int counter
)
579 return PVOP_CALL1(u64
, read_pmc
, counter
);
582 #define rdpmc(counter,low,high) do { \
583 u64 _l = paravirt_read_pmc(counter); \
588 static inline void load_TR_desc(void)
590 PVOP_VCALL0(load_tr_desc
);
592 static inline void load_gdt(const struct Xgt_desc_struct
*dtr
)
594 PVOP_VCALL1(load_gdt
, dtr
);
596 static inline void load_idt(const struct Xgt_desc_struct
*dtr
)
598 PVOP_VCALL1(load_idt
, dtr
);
600 static inline void set_ldt(const void *addr
, unsigned entries
)
602 PVOP_VCALL2(set_ldt
, addr
, entries
);
604 static inline void store_gdt(struct Xgt_desc_struct
*dtr
)
606 PVOP_VCALL1(store_gdt
, dtr
);
608 static inline void store_idt(struct Xgt_desc_struct
*dtr
)
610 PVOP_VCALL1(store_idt
, dtr
);
612 static inline unsigned long paravirt_store_tr(void)
614 return PVOP_CALL0(unsigned long, store_tr
);
616 #define store_tr(tr) ((tr) = paravirt_store_tr())
617 static inline void load_TLS(struct thread_struct
*t
, unsigned cpu
)
619 PVOP_VCALL2(load_tls
, t
, cpu
);
621 static inline void write_ldt_entry(void *dt
, int entry
, u32 low
, u32 high
)
623 PVOP_VCALL4(write_ldt_entry
, dt
, entry
, low
, high
);
625 static inline void write_gdt_entry(void *dt
, int entry
, u32 low
, u32 high
)
627 PVOP_VCALL4(write_gdt_entry
, dt
, entry
, low
, high
);
629 static inline void write_idt_entry(void *dt
, int entry
, u32 low
, u32 high
)
631 PVOP_VCALL4(write_idt_entry
, dt
, entry
, low
, high
);
633 static inline void set_iopl_mask(unsigned mask
)
635 PVOP_VCALL1(set_iopl_mask
, mask
);
638 /* The paravirtualized I/O functions */
639 static inline void slow_down_io(void) {
640 paravirt_ops
.io_delay();
641 #ifdef REALLY_SLOW_IO
642 paravirt_ops
.io_delay();
643 paravirt_ops
.io_delay();
644 paravirt_ops
.io_delay();
648 #ifdef CONFIG_X86_LOCAL_APIC
650 * Basic functions accessing APICs.
652 static inline void apic_write(unsigned long reg
, unsigned long v
)
654 PVOP_VCALL2(apic_write
, reg
, v
);
657 static inline void apic_write_atomic(unsigned long reg
, unsigned long v
)
659 PVOP_VCALL2(apic_write_atomic
, reg
, v
);
662 static inline unsigned long apic_read(unsigned long reg
)
664 return PVOP_CALL1(unsigned long, apic_read
, reg
);
667 static inline void setup_boot_clock(void)
669 PVOP_VCALL0(setup_boot_clock
);
672 static inline void setup_secondary_clock(void)
674 PVOP_VCALL0(setup_secondary_clock
);
678 static inline void paravirt_post_allocator_init(void)
680 if (paravirt_ops
.post_allocator_init
)
681 (*paravirt_ops
.post_allocator_init
)();
684 static inline void paravirt_pagetable_setup_start(pgd_t
*base
)
686 if (paravirt_ops
.pagetable_setup_start
)
687 (*paravirt_ops
.pagetable_setup_start
)(base
);
690 static inline void paravirt_pagetable_setup_done(pgd_t
*base
)
692 if (paravirt_ops
.pagetable_setup_done
)
693 (*paravirt_ops
.pagetable_setup_done
)(base
);
697 static inline void startup_ipi_hook(int phys_apicid
, unsigned long start_eip
,
698 unsigned long start_esp
)
700 PVOP_VCALL3(startup_ipi_hook
, phys_apicid
, start_eip
, start_esp
);
704 static inline void paravirt_activate_mm(struct mm_struct
*prev
,
705 struct mm_struct
*next
)
707 PVOP_VCALL2(activate_mm
, prev
, next
);
710 static inline void arch_dup_mmap(struct mm_struct
*oldmm
,
711 struct mm_struct
*mm
)
713 PVOP_VCALL2(dup_mmap
, oldmm
, mm
);
716 static inline void arch_exit_mmap(struct mm_struct
*mm
)
718 PVOP_VCALL1(exit_mmap
, mm
);
721 static inline void __flush_tlb(void)
723 PVOP_VCALL0(flush_tlb_user
);
725 static inline void __flush_tlb_global(void)
727 PVOP_VCALL0(flush_tlb_kernel
);
729 static inline void __flush_tlb_single(unsigned long addr
)
731 PVOP_VCALL1(flush_tlb_single
, addr
);
734 static inline void flush_tlb_others(cpumask_t cpumask
, struct mm_struct
*mm
,
737 PVOP_VCALL3(flush_tlb_others
, &cpumask
, mm
, va
);
740 static inline void paravirt_alloc_pt(struct mm_struct
*mm
, unsigned pfn
)
742 PVOP_VCALL2(alloc_pt
, mm
, pfn
);
744 static inline void paravirt_release_pt(unsigned pfn
)
746 PVOP_VCALL1(release_pt
, pfn
);
749 static inline void paravirt_alloc_pd(unsigned pfn
)
751 PVOP_VCALL1(alloc_pd
, pfn
);
754 static inline void paravirt_alloc_pd_clone(unsigned pfn
, unsigned clonepfn
,
755 unsigned start
, unsigned count
)
757 PVOP_VCALL4(alloc_pd_clone
, pfn
, clonepfn
, start
, count
);
759 static inline void paravirt_release_pd(unsigned pfn
)
761 PVOP_VCALL1(release_pd
, pfn
);
764 #ifdef CONFIG_HIGHPTE
765 static inline void *kmap_atomic_pte(struct page
*page
, enum km_type type
)
768 ret
= PVOP_CALL2(unsigned long, kmap_atomic_pte
, page
, type
);
773 static inline void pte_update(struct mm_struct
*mm
, unsigned long addr
,
776 PVOP_VCALL3(pte_update
, mm
, addr
, ptep
);
779 static inline void pte_update_defer(struct mm_struct
*mm
, unsigned long addr
,
782 PVOP_VCALL3(pte_update_defer
, mm
, addr
, ptep
);
785 #ifdef CONFIG_X86_PAE
786 static inline pte_t
__pte(unsigned long long val
)
788 unsigned long long ret
= PVOP_CALL2(unsigned long long, make_pte
,
790 return (pte_t
) { ret
, ret
>> 32 };
793 static inline pmd_t
__pmd(unsigned long long val
)
795 return (pmd_t
) { PVOP_CALL2(unsigned long long, make_pmd
, val
, val
>> 32) };
798 static inline pgd_t
__pgd(unsigned long long val
)
800 return (pgd_t
) { PVOP_CALL2(unsigned long long, make_pgd
, val
, val
>> 32) };
803 static inline unsigned long long pte_val(pte_t x
)
805 return PVOP_CALL2(unsigned long long, pte_val
, x
.pte_low
, x
.pte_high
);
808 static inline unsigned long long pmd_val(pmd_t x
)
810 return PVOP_CALL2(unsigned long long, pmd_val
, x
.pmd
, x
.pmd
>> 32);
813 static inline unsigned long long pgd_val(pgd_t x
)
815 return PVOP_CALL2(unsigned long long, pgd_val
, x
.pgd
, x
.pgd
>> 32);
818 static inline void set_pte(pte_t
*ptep
, pte_t pteval
)
820 PVOP_VCALL3(set_pte
, ptep
, pteval
.pte_low
, pteval
.pte_high
);
823 static inline void set_pte_at(struct mm_struct
*mm
, unsigned long addr
,
824 pte_t
*ptep
, pte_t pteval
)
827 paravirt_ops
.set_pte_at(mm
, addr
, ptep
, pteval
);
830 static inline void set_pte_atomic(pte_t
*ptep
, pte_t pteval
)
832 PVOP_VCALL3(set_pte_atomic
, ptep
, pteval
.pte_low
, pteval
.pte_high
);
835 static inline void set_pte_present(struct mm_struct
*mm
, unsigned long addr
,
836 pte_t
*ptep
, pte_t pte
)
839 paravirt_ops
.set_pte_present(mm
, addr
, ptep
, pte
);
842 static inline void set_pmd(pmd_t
*pmdp
, pmd_t pmdval
)
844 PVOP_VCALL3(set_pmd
, pmdp
, pmdval
.pmd
, pmdval
.pmd
>> 32);
847 static inline void set_pud(pud_t
*pudp
, pud_t pudval
)
849 PVOP_VCALL3(set_pud
, pudp
, pudval
.pgd
.pgd
, pudval
.pgd
.pgd
>> 32);
852 static inline void pte_clear(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
)
854 PVOP_VCALL3(pte_clear
, mm
, addr
, ptep
);
857 static inline void pmd_clear(pmd_t
*pmdp
)
859 PVOP_VCALL1(pmd_clear
, pmdp
);
862 #else /* !CONFIG_X86_PAE */
864 static inline pte_t
__pte(unsigned long val
)
866 return (pte_t
) { PVOP_CALL1(unsigned long, make_pte
, val
) };
869 static inline pgd_t
__pgd(unsigned long val
)
871 return (pgd_t
) { PVOP_CALL1(unsigned long, make_pgd
, val
) };
874 static inline unsigned long pte_val(pte_t x
)
876 return PVOP_CALL1(unsigned long, pte_val
, x
.pte_low
);
879 static inline unsigned long pgd_val(pgd_t x
)
881 return PVOP_CALL1(unsigned long, pgd_val
, x
.pgd
);
884 static inline void set_pte(pte_t
*ptep
, pte_t pteval
)
886 PVOP_VCALL2(set_pte
, ptep
, pteval
.pte_low
);
889 static inline void set_pte_at(struct mm_struct
*mm
, unsigned long addr
,
890 pte_t
*ptep
, pte_t pteval
)
892 PVOP_VCALL4(set_pte_at
, mm
, addr
, ptep
, pteval
.pte_low
);
895 static inline void set_pmd(pmd_t
*pmdp
, pmd_t pmdval
)
897 PVOP_VCALL2(set_pmd
, pmdp
, pmdval
.pud
.pgd
.pgd
);
899 #endif /* CONFIG_X86_PAE */
901 #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
902 static inline void arch_enter_lazy_cpu_mode(void)
904 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_CPU
);
907 static inline void arch_leave_lazy_cpu_mode(void)
909 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_NONE
);
912 static inline void arch_flush_lazy_cpu_mode(void)
914 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_FLUSH
);
918 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
919 static inline void arch_enter_lazy_mmu_mode(void)
921 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_MMU
);
924 static inline void arch_leave_lazy_mmu_mode(void)
926 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_NONE
);
929 static inline void arch_flush_lazy_mmu_mode(void)
931 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_FLUSH
);
934 void _paravirt_nop(void);
935 #define paravirt_nop ((void *)_paravirt_nop)
937 /* These all sit in the .parainstructions section to tell us what to patch. */
938 struct paravirt_patch_site
{
939 u8
*instr
; /* original instructions */
940 u8 instrtype
; /* type of this instruction */
941 u8 len
; /* length of original instruction */
942 u16 clobbers
; /* what registers you may clobber */
945 extern struct paravirt_patch_site __parainstructions
[],
946 __parainstructions_end
[];
948 static inline unsigned long __raw_local_save_flags(void)
952 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
954 "popl %%edx; popl %%ecx")
956 : paravirt_type(save_fl
),
957 paravirt_clobber(CLBR_EAX
)
962 static inline void raw_local_irq_restore(unsigned long f
)
964 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
966 "popl %%edx; popl %%ecx")
969 paravirt_type(restore_fl
),
970 paravirt_clobber(CLBR_EAX
)
974 static inline void raw_local_irq_disable(void)
976 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
978 "popl %%edx; popl %%ecx")
980 : paravirt_type(irq_disable
),
981 paravirt_clobber(CLBR_EAX
)
982 : "memory", "eax", "cc");
985 static inline void raw_local_irq_enable(void)
987 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
989 "popl %%edx; popl %%ecx")
991 : paravirt_type(irq_enable
),
992 paravirt_clobber(CLBR_EAX
)
993 : "memory", "eax", "cc");
996 static inline unsigned long __raw_local_irq_save(void)
1000 f
= __raw_local_save_flags();
1001 raw_local_irq_disable();
1005 #define CLI_STRING \
1006 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1007 "call *paravirt_ops+%c[paravirt_cli_type]*4;" \
1008 "popl %%edx; popl %%ecx", \
1009 "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1011 #define STI_STRING \
1012 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1013 "call *paravirt_ops+%c[paravirt_sti_type]*4;" \
1014 "popl %%edx; popl %%ecx", \
1015 "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1017 #define CLI_STI_CLOBBERS , "%eax"
1018 #define CLI_STI_INPUT_ARGS \
1020 [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \
1021 [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \
1022 paravirt_clobber(CLBR_EAX)
1024 /* Make sure as little as possible of this mess escapes. */
1025 #undef PARAVIRT_CALL
1039 #else /* __ASSEMBLY__ */
1041 #define PARA_PATCH(off) ((off) / 4)
1043 #define PARA_SITE(ptype, clobbers, ops) \
1047 .pushsection .parainstructions,"a"; \
1054 #define INTERRUPT_RETURN \
1055 PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \
1056 jmp *%cs:paravirt_ops+PARAVIRT_iret)
1058 #define DISABLE_INTERRUPTS(clobbers) \
1059 PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \
1060 pushl %eax; pushl %ecx; pushl %edx; \
1061 call *%cs:paravirt_ops+PARAVIRT_irq_disable; \
1062 popl %edx; popl %ecx; popl %eax) \
1064 #define ENABLE_INTERRUPTS(clobbers) \
1065 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \
1066 pushl %eax; pushl %ecx; pushl %edx; \
1067 call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
1068 popl %edx; popl %ecx; popl %eax)
1070 #define ENABLE_INTERRUPTS_SYSEXIT \
1071 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \
1072 jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1074 #define GET_CR0_INTO_EAX \
1075 push %ecx; push %edx; \
1076 call *paravirt_ops+PARAVIRT_read_cr0; \
1079 #endif /* __ASSEMBLY__ */
1080 #endif /* CONFIG_PARAVIRT */
1081 #endif /* __ASM_PARAVIRT_H */