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 (*init_IRQ
)(void);
56 void (*time_init
)(void);
59 * Called before/after init_mm pagetable setup. setup_start
60 * may reset %cr3, and may pre-install parts of the pagetable;
61 * pagetable setup is expected to preserve any existing
64 void (*pagetable_setup_start
)(pgd_t
*pgd_base
);
65 void (*pagetable_setup_done
)(pgd_t
*pgd_base
);
67 /* Print a banner to identify the environment */
70 /* Set and set time of day */
71 unsigned long (*get_wallclock
)(void);
72 int (*set_wallclock
)(unsigned long);
74 /* cpuid emulation, mostly so that caps bits can be disabled */
75 void (*cpuid
)(unsigned int *eax
, unsigned int *ebx
,
76 unsigned int *ecx
, unsigned int *edx
);
78 /* hooks for various privileged instructions */
79 unsigned long (*get_debugreg
)(int regno
);
80 void (*set_debugreg
)(int regno
, unsigned long value
);
84 unsigned long (*read_cr0
)(void);
85 void (*write_cr0
)(unsigned long);
87 unsigned long (*read_cr2
)(void);
88 void (*write_cr2
)(unsigned long);
90 unsigned long (*read_cr3
)(void);
91 void (*write_cr3
)(unsigned long);
93 unsigned long (*read_cr4_safe
)(void);
94 unsigned long (*read_cr4
)(void);
95 void (*write_cr4
)(unsigned long);
98 * Get/set interrupt state. save_fl and restore_fl are only
99 * expected to use X86_EFLAGS_IF; all other bits
100 * returned from save_fl are undefined, and may be ignored by
103 unsigned long (*save_fl
)(void);
104 void (*restore_fl
)(unsigned long);
105 void (*irq_disable
)(void);
106 void (*irq_enable
)(void);
107 void (*safe_halt
)(void);
110 void (*wbinvd
)(void);
112 /* MSR, PMC and TSR operations.
113 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
114 u64 (*read_msr
)(unsigned int msr
, int *err
);
115 int (*write_msr
)(unsigned int msr
, u64 val
);
117 u64 (*read_tsc
)(void);
118 u64 (*read_pmc
)(void);
119 u64 (*get_scheduled_cycles
)(void);
120 unsigned long (*get_cpu_khz
)(void);
122 /* Segment descriptor handling */
123 void (*load_tr_desc
)(void);
124 void (*load_gdt
)(const struct Xgt_desc_struct
*);
125 void (*load_idt
)(const struct Xgt_desc_struct
*);
126 void (*store_gdt
)(struct Xgt_desc_struct
*);
127 void (*store_idt
)(struct Xgt_desc_struct
*);
128 void (*set_ldt
)(const void *desc
, unsigned entries
);
129 unsigned long (*store_tr
)(void);
130 void (*load_tls
)(struct thread_struct
*t
, unsigned int cpu
);
131 void (*write_ldt_entry
)(struct desc_struct
*,
132 int entrynum
, u32 low
, u32 high
);
133 void (*write_gdt_entry
)(struct desc_struct
*,
134 int entrynum
, u32 low
, u32 high
);
135 void (*write_idt_entry
)(struct desc_struct
*,
136 int entrynum
, u32 low
, u32 high
);
137 void (*load_esp0
)(struct tss_struct
*tss
, struct thread_struct
*t
);
139 void (*set_iopl_mask
)(unsigned mask
);
140 void (*io_delay
)(void);
143 * Hooks for intercepting the creation/use/destruction of an
146 void (*activate_mm
)(struct mm_struct
*prev
,
147 struct mm_struct
*next
);
148 void (*dup_mmap
)(struct mm_struct
*oldmm
,
149 struct mm_struct
*mm
);
150 void (*exit_mmap
)(struct mm_struct
*mm
);
152 #ifdef CONFIG_X86_LOCAL_APIC
154 * Direct APIC operations, principally for VMI. Ideally
155 * these shouldn't be in this interface.
157 void (*apic_write
)(unsigned long reg
, unsigned long v
);
158 void (*apic_write_atomic
)(unsigned long reg
, unsigned long v
);
159 unsigned long (*apic_read
)(unsigned long reg
);
160 void (*setup_boot_clock
)(void);
161 void (*setup_secondary_clock
)(void);
163 void (*startup_ipi_hook
)(int phys_apicid
,
164 unsigned long start_eip
,
165 unsigned long start_esp
);
169 void (*flush_tlb_user
)(void);
170 void (*flush_tlb_kernel
)(void);
171 void (*flush_tlb_single
)(unsigned long addr
);
172 void (*flush_tlb_others
)(const cpumask_t
*cpus
, struct mm_struct
*mm
,
175 /* Hooks for allocating/releasing pagetable pages */
176 void (*alloc_pt
)(u32 pfn
);
177 void (*alloc_pd
)(u32 pfn
);
178 void (*alloc_pd_clone
)(u32 pfn
, u32 clonepfn
, u32 start
, u32 count
);
179 void (*release_pt
)(u32 pfn
);
180 void (*release_pd
)(u32 pfn
);
182 /* Pagetable manipulation functions */
183 void (*set_pte
)(pte_t
*ptep
, pte_t pteval
);
184 void (*set_pte_at
)(struct mm_struct
*mm
, unsigned long addr
,
185 pte_t
*ptep
, pte_t pteval
);
186 void (*set_pmd
)(pmd_t
*pmdp
, pmd_t pmdval
);
187 void (*pte_update
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
);
188 void (*pte_update_defer
)(struct mm_struct
*mm
,
189 unsigned long addr
, pte_t
*ptep
);
191 #ifdef CONFIG_HIGHPTE
192 void *(*kmap_atomic_pte
)(struct page
*page
, enum km_type type
);
195 #ifdef CONFIG_X86_PAE
196 void (*set_pte_atomic
)(pte_t
*ptep
, pte_t pteval
);
197 void (*set_pte_present
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
, pte_t pte
);
198 void (*set_pud
)(pud_t
*pudp
, pud_t pudval
);
199 void (*pte_clear
)(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
);
200 void (*pmd_clear
)(pmd_t
*pmdp
);
202 unsigned long long (*pte_val
)(pte_t
);
203 unsigned long long (*pmd_val
)(pmd_t
);
204 unsigned long long (*pgd_val
)(pgd_t
);
206 pte_t (*make_pte
)(unsigned long long pte
);
207 pmd_t (*make_pmd
)(unsigned long long pmd
);
208 pgd_t (*make_pgd
)(unsigned long long pgd
);
210 unsigned long (*pte_val
)(pte_t
);
211 unsigned long (*pgd_val
)(pgd_t
);
213 pte_t (*make_pte
)(unsigned long pte
);
214 pgd_t (*make_pgd
)(unsigned long pgd
);
217 /* Set deferred update mode, used for batching operations. */
218 void (*set_lazy_mode
)(enum paravirt_lazy_mode mode
);
220 /* These two are jmp to, not actually called. */
221 void (*irq_enable_sysexit
)(void);
225 /* Mark a paravirt probe function. */
226 #define paravirt_probe(fn) \
227 static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
228 __attribute__((__section__(".paravirtprobe"))) = fn
230 extern struct paravirt_ops paravirt_ops
;
232 #define PARAVIRT_PATCH(x) \
233 (offsetof(struct paravirt_ops, x) / sizeof(void *))
235 #define paravirt_type(type) \
236 [paravirt_typenum] "i" (PARAVIRT_PATCH(type))
237 #define paravirt_clobber(clobber) \
238 [paravirt_clobber] "i" (clobber)
241 * Generate some code, and mark it as patchable by the
242 * apply_paravirt() alternate instruction patcher.
244 #define _paravirt_alt(insn_string, type, clobber) \
245 "771:\n\t" insn_string "\n" "772:\n" \
246 ".pushsection .parainstructions,\"a\"\n" \
248 " .byte " type "\n" \
249 " .byte 772b-771b\n" \
250 " .short " clobber "\n" \
253 /* Generate patchable code, with the default asm parameters. */
254 #define paravirt_alt(insn_string) \
255 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
257 unsigned paravirt_patch_nop(void);
258 unsigned paravirt_patch_ignore(unsigned len
);
259 unsigned paravirt_patch_call(void *target
, u16 tgt_clobbers
,
260 void *site
, u16 site_clobbers
,
262 unsigned paravirt_patch_jmp(void *target
, void *site
, unsigned len
);
263 unsigned paravirt_patch_default(u8 type
, u16 clobbers
, void *site
, unsigned len
);
265 unsigned paravirt_patch_insns(void *site
, unsigned len
,
266 const char *start
, const char *end
);
270 * This generates an indirect call based on the operation type number.
271 * The type number, computed in PARAVIRT_PATCH, is derived from the
272 * offset into the paravirt_ops structure, and can therefore be freely
273 * converted back into a structure offset.
275 #define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);"
278 * These macros are intended to wrap calls into a paravirt_ops
279 * operation, so that they can be later identified and patched at
282 * Normally, a call to a pv_op function is a simple indirect call:
283 * (paravirt_ops.operations)(args...).
285 * Unfortunately, this is a relatively slow operation for modern CPUs,
286 * because it cannot necessarily determine what the destination
287 * address is. In this case, the address is a runtime constant, so at
288 * the very least we can patch the call to e a simple direct call, or
289 * ideally, patch an inline implementation into the callsite. (Direct
290 * calls are essentially free, because the call and return addresses
291 * are completely predictable.)
293 * These macros rely on the standard gcc "regparm(3)" calling
294 * convention, in which the first three arguments are placed in %eax,
295 * %edx, %ecx (in that order), and the remaining arguments are placed
296 * on the stack. All caller-save registers (eax,edx,ecx) are expected
297 * to be modified (either clobbered or used for return values).
299 * The call instruction itself is marked by placing its start address
300 * and size into the .parainstructions section, so that
301 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
302 * appropriate patching under the control of the backend paravirt_ops
305 * Unfortunately there's no way to get gcc to generate the args setup
306 * for the call, and then allow the call itself to be generated by an
307 * inline asm. Because of this, we must do the complete arg setup and
308 * return value handling from within these macros. This is fairly
311 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
312 * It could be extended to more arguments, but there would be little
313 * to be gained from that. For each number of arguments, there are
314 * the two VCALL and CALL variants for void and non-void functions.
316 * When there is a return value, the invoker of the macro must specify
317 * the return type. The macro then uses sizeof() on that type to
318 * determine whether its a 32 or 64 bit value, and places the return
319 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
322 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
325 * Small structures are passed and returned in registers. The macro
326 * calling convention can't directly deal with this, so the wrapper
327 * functions must do this.
329 * These PVOP_* macros are only defined within this header. This
330 * means that all uses must be wrapped in inline functions. This also
331 * makes sure the incoming and outgoing types are always correct.
333 #define __PVOP_CALL(rettype, op, pre, post, ...) \
336 unsigned long __eax, __edx, __ecx; \
337 if (sizeof(rettype) > sizeof(unsigned long)) { \
339 paravirt_alt(PARAVIRT_CALL) \
341 : "=a" (__eax), "=d" (__edx), \
343 : paravirt_type(op), \
344 paravirt_clobber(CLBR_ANY), \
347 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
350 paravirt_alt(PARAVIRT_CALL) \
352 : "=a" (__eax), "=d" (__edx), \
354 : paravirt_type(op), \
355 paravirt_clobber(CLBR_ANY), \
358 __ret = (rettype)__eax; \
362 #define __PVOP_VCALL(op, pre, post, ...) \
364 unsigned long __eax, __edx, __ecx; \
366 paravirt_alt(PARAVIRT_CALL) \
368 : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \
369 : paravirt_type(op), \
370 paravirt_clobber(CLBR_ANY), \
375 #define PVOP_CALL0(rettype, op) \
376 __PVOP_CALL(rettype, op, "", "")
377 #define PVOP_VCALL0(op) \
378 __PVOP_VCALL(op, "", "")
380 #define PVOP_CALL1(rettype, op, arg1) \
381 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)))
382 #define PVOP_VCALL1(op, arg1) \
383 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)))
385 #define PVOP_CALL2(rettype, op, arg1, arg2) \
386 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
387 #define PVOP_VCALL2(op, arg1, arg2) \
388 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2)))
390 #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
391 __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), \
392 "1"((u32)(arg2)), "2"((u32)(arg3)))
393 #define PVOP_VCALL3(op, arg1, arg2, arg3) \
394 __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1"((u32)(arg2)), \
397 #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
398 __PVOP_CALL(rettype, op, \
399 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
400 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
401 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
402 #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
404 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
405 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
406 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
408 static inline int paravirt_enabled(void)
410 return paravirt_ops
.paravirt_enabled
;
413 static inline void load_esp0(struct tss_struct
*tss
,
414 struct thread_struct
*thread
)
416 PVOP_VCALL2(load_esp0
, tss
, thread
);
419 #define ARCH_SETUP paravirt_ops.arch_setup();
420 static inline unsigned long get_wallclock(void)
422 return PVOP_CALL0(unsigned long, get_wallclock
);
425 static inline int set_wallclock(unsigned long nowtime
)
427 return PVOP_CALL1(int, set_wallclock
, nowtime
);
430 static inline void (*choose_time_init(void))(void)
432 return paravirt_ops
.time_init
;
435 /* The paravirtualized CPUID instruction. */
436 static inline void __cpuid(unsigned int *eax
, unsigned int *ebx
,
437 unsigned int *ecx
, unsigned int *edx
)
439 PVOP_VCALL4(cpuid
, eax
, ebx
, ecx
, edx
);
443 * These special macros can be used to get or set a debugging register
445 static inline unsigned long paravirt_get_debugreg(int reg
)
447 return PVOP_CALL1(unsigned long, get_debugreg
, reg
);
449 #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
450 static inline void set_debugreg(unsigned long val
, int reg
)
452 PVOP_VCALL2(set_debugreg
, reg
, val
);
455 static inline void clts(void)
460 static inline unsigned long read_cr0(void)
462 return PVOP_CALL0(unsigned long, read_cr0
);
465 static inline void write_cr0(unsigned long x
)
467 PVOP_VCALL1(write_cr0
, x
);
470 static inline unsigned long read_cr2(void)
472 return PVOP_CALL0(unsigned long, read_cr2
);
475 static inline void write_cr2(unsigned long x
)
477 PVOP_VCALL1(write_cr2
, x
);
480 static inline unsigned long read_cr3(void)
482 return PVOP_CALL0(unsigned long, read_cr3
);
485 static inline void write_cr3(unsigned long x
)
487 PVOP_VCALL1(write_cr3
, x
);
490 static inline unsigned long read_cr4(void)
492 return PVOP_CALL0(unsigned long, read_cr4
);
494 static inline unsigned long read_cr4_safe(void)
496 return PVOP_CALL0(unsigned long, read_cr4_safe
);
499 static inline void write_cr4(unsigned long x
)
501 PVOP_VCALL1(write_cr4
, x
);
504 static inline void raw_safe_halt(void)
506 PVOP_VCALL0(safe_halt
);
509 static inline void halt(void)
511 PVOP_VCALL0(safe_halt
);
514 static inline void wbinvd(void)
519 #define get_kernel_rpl() (paravirt_ops.kernel_rpl)
521 static inline u64
paravirt_read_msr(unsigned msr
, int *err
)
523 return PVOP_CALL2(u64
, read_msr
, msr
, err
);
525 static inline int paravirt_write_msr(unsigned msr
, unsigned low
, unsigned high
)
527 return PVOP_CALL3(int, write_msr
, msr
, low
, high
);
530 /* These should all do BUG_ON(_err), but our headers are too tangled. */
531 #define rdmsr(msr,val1,val2) do { \
533 u64 _l = paravirt_read_msr(msr, &_err); \
538 #define wrmsr(msr,val1,val2) do { \
539 paravirt_write_msr(msr, val1, val2); \
542 #define rdmsrl(msr,val) do { \
544 val = paravirt_read_msr(msr, &_err); \
547 #define wrmsrl(msr,val) ((void)paravirt_write_msr(msr, val, 0))
548 #define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
550 /* rdmsr with exception handling */
551 #define rdmsr_safe(msr,a,b) ({ \
553 u64 _l = paravirt_read_msr(msr, &_err); \
559 static inline u64
paravirt_read_tsc(void)
561 return PVOP_CALL0(u64
, read_tsc
);
563 #define rdtsc(low,high) do { \
564 u64 _l = paravirt_read_tsc(); \
569 #define rdtscl(low) do { \
570 u64 _l = paravirt_read_tsc(); \
574 #define rdtscll(val) (val = paravirt_read_tsc())
576 #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
577 #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
579 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
581 static inline unsigned long long paravirt_read_pmc(int counter
)
583 return PVOP_CALL1(u64
, read_pmc
, counter
);
586 #define rdpmc(counter,low,high) do { \
587 u64 _l = paravirt_read_pmc(counter); \
592 static inline void load_TR_desc(void)
594 PVOP_VCALL0(load_tr_desc
);
596 static inline void load_gdt(const struct Xgt_desc_struct
*dtr
)
598 PVOP_VCALL1(load_gdt
, dtr
);
600 static inline void load_idt(const struct Xgt_desc_struct
*dtr
)
602 PVOP_VCALL1(load_idt
, dtr
);
604 static inline void set_ldt(const void *addr
, unsigned entries
)
606 PVOP_VCALL2(set_ldt
, addr
, entries
);
608 static inline void store_gdt(struct Xgt_desc_struct
*dtr
)
610 PVOP_VCALL1(store_gdt
, dtr
);
612 static inline void store_idt(struct Xgt_desc_struct
*dtr
)
614 PVOP_VCALL1(store_idt
, dtr
);
616 static inline unsigned long paravirt_store_tr(void)
618 return PVOP_CALL0(unsigned long, store_tr
);
620 #define store_tr(tr) ((tr) = paravirt_store_tr())
621 static inline void load_TLS(struct thread_struct
*t
, unsigned cpu
)
623 PVOP_VCALL2(load_tls
, t
, cpu
);
625 static inline void write_ldt_entry(void *dt
, int entry
, u32 low
, u32 high
)
627 PVOP_VCALL4(write_ldt_entry
, dt
, entry
, low
, high
);
629 static inline void write_gdt_entry(void *dt
, int entry
, u32 low
, u32 high
)
631 PVOP_VCALL4(write_gdt_entry
, dt
, entry
, low
, high
);
633 static inline void write_idt_entry(void *dt
, int entry
, u32 low
, u32 high
)
635 PVOP_VCALL4(write_idt_entry
, dt
, entry
, low
, high
);
637 static inline void set_iopl_mask(unsigned mask
)
639 PVOP_VCALL1(set_iopl_mask
, mask
);
642 /* The paravirtualized I/O functions */
643 static inline void slow_down_io(void) {
644 paravirt_ops
.io_delay();
645 #ifdef REALLY_SLOW_IO
646 paravirt_ops
.io_delay();
647 paravirt_ops
.io_delay();
648 paravirt_ops
.io_delay();
652 #ifdef CONFIG_X86_LOCAL_APIC
654 * Basic functions accessing APICs.
656 static inline void apic_write(unsigned long reg
, unsigned long v
)
658 PVOP_VCALL2(apic_write
, reg
, v
);
661 static inline void apic_write_atomic(unsigned long reg
, unsigned long v
)
663 PVOP_VCALL2(apic_write_atomic
, reg
, v
);
666 static inline unsigned long apic_read(unsigned long reg
)
668 return PVOP_CALL1(unsigned long, apic_read
, reg
);
671 static inline void setup_boot_clock(void)
673 PVOP_VCALL0(setup_boot_clock
);
676 static inline void setup_secondary_clock(void)
678 PVOP_VCALL0(setup_secondary_clock
);
682 static inline void paravirt_pagetable_setup_start(pgd_t
*base
)
684 if (paravirt_ops
.pagetable_setup_start
)
685 (*paravirt_ops
.pagetable_setup_start
)(base
);
688 static inline void paravirt_pagetable_setup_done(pgd_t
*base
)
690 if (paravirt_ops
.pagetable_setup_done
)
691 (*paravirt_ops
.pagetable_setup_done
)(base
);
695 static inline void startup_ipi_hook(int phys_apicid
, unsigned long start_eip
,
696 unsigned long start_esp
)
698 PVOP_VCALL3(startup_ipi_hook
, phys_apicid
, start_eip
, start_esp
);
702 static inline void paravirt_activate_mm(struct mm_struct
*prev
,
703 struct mm_struct
*next
)
705 PVOP_VCALL2(activate_mm
, prev
, next
);
708 static inline void arch_dup_mmap(struct mm_struct
*oldmm
,
709 struct mm_struct
*mm
)
711 PVOP_VCALL2(dup_mmap
, oldmm
, mm
);
714 static inline void arch_exit_mmap(struct mm_struct
*mm
)
716 PVOP_VCALL1(exit_mmap
, mm
);
719 static inline void __flush_tlb(void)
721 PVOP_VCALL0(flush_tlb_user
);
723 static inline void __flush_tlb_global(void)
725 PVOP_VCALL0(flush_tlb_kernel
);
727 static inline void __flush_tlb_single(unsigned long addr
)
729 PVOP_VCALL1(flush_tlb_single
, addr
);
732 static inline void flush_tlb_others(cpumask_t cpumask
, struct mm_struct
*mm
,
735 PVOP_VCALL3(flush_tlb_others
, &cpumask
, mm
, va
);
738 static inline void paravirt_alloc_pt(unsigned pfn
)
740 PVOP_VCALL1(alloc_pt
, pfn
);
742 static inline void paravirt_release_pt(unsigned pfn
)
744 PVOP_VCALL1(release_pt
, pfn
);
747 static inline void paravirt_alloc_pd(unsigned pfn
)
749 PVOP_VCALL1(alloc_pd
, pfn
);
752 static inline void paravirt_alloc_pd_clone(unsigned pfn
, unsigned clonepfn
,
753 unsigned start
, unsigned count
)
755 PVOP_VCALL4(alloc_pd_clone
, pfn
, clonepfn
, start
, count
);
757 static inline void paravirt_release_pd(unsigned pfn
)
759 PVOP_VCALL1(release_pd
, pfn
);
762 #ifdef CONFIG_HIGHPTE
763 static inline void *kmap_atomic_pte(struct page
*page
, enum km_type type
)
766 ret
= PVOP_CALL2(unsigned long, kmap_atomic_pte
, page
, type
);
771 static inline void pte_update(struct mm_struct
*mm
, unsigned long addr
,
774 PVOP_VCALL3(pte_update
, mm
, addr
, ptep
);
777 static inline void pte_update_defer(struct mm_struct
*mm
, unsigned long addr
,
780 PVOP_VCALL3(pte_update_defer
, mm
, addr
, ptep
);
783 #ifdef CONFIG_X86_PAE
784 static inline pte_t
__pte(unsigned long long val
)
786 unsigned long long ret
= PVOP_CALL2(unsigned long long, make_pte
,
788 return (pte_t
) { ret
, ret
>> 32 };
791 static inline pmd_t
__pmd(unsigned long long val
)
793 return (pmd_t
) { PVOP_CALL2(unsigned long long, make_pmd
, val
, val
>> 32) };
796 static inline pgd_t
__pgd(unsigned long long val
)
798 return (pgd_t
) { PVOP_CALL2(unsigned long long, make_pgd
, val
, val
>> 32) };
801 static inline unsigned long long pte_val(pte_t x
)
803 return PVOP_CALL2(unsigned long long, pte_val
, x
.pte_low
, x
.pte_high
);
806 static inline unsigned long long pmd_val(pmd_t x
)
808 return PVOP_CALL2(unsigned long long, pmd_val
, x
.pmd
, x
.pmd
>> 32);
811 static inline unsigned long long pgd_val(pgd_t x
)
813 return PVOP_CALL2(unsigned long long, pgd_val
, x
.pgd
, x
.pgd
>> 32);
816 static inline void set_pte(pte_t
*ptep
, pte_t pteval
)
818 PVOP_VCALL3(set_pte
, ptep
, pteval
.pte_low
, pteval
.pte_high
);
821 static inline void set_pte_at(struct mm_struct
*mm
, unsigned long addr
,
822 pte_t
*ptep
, pte_t pteval
)
825 paravirt_ops
.set_pte_at(mm
, addr
, ptep
, pteval
);
828 static inline void set_pte_atomic(pte_t
*ptep
, pte_t pteval
)
830 PVOP_VCALL3(set_pte_atomic
, ptep
, pteval
.pte_low
, pteval
.pte_high
);
833 static inline void set_pte_present(struct mm_struct
*mm
, unsigned long addr
,
834 pte_t
*ptep
, pte_t pte
)
837 paravirt_ops
.set_pte_present(mm
, addr
, ptep
, pte
);
840 static inline void set_pmd(pmd_t
*pmdp
, pmd_t pmdval
)
842 PVOP_VCALL3(set_pmd
, pmdp
, pmdval
.pmd
, pmdval
.pmd
>> 32);
845 static inline void set_pud(pud_t
*pudp
, pud_t pudval
)
847 PVOP_VCALL3(set_pud
, pudp
, pudval
.pgd
.pgd
, pudval
.pgd
.pgd
>> 32);
850 static inline void pte_clear(struct mm_struct
*mm
, unsigned long addr
, pte_t
*ptep
)
852 PVOP_VCALL3(pte_clear
, mm
, addr
, ptep
);
855 static inline void pmd_clear(pmd_t
*pmdp
)
857 PVOP_VCALL1(pmd_clear
, pmdp
);
860 #else /* !CONFIG_X86_PAE */
862 static inline pte_t
__pte(unsigned long val
)
864 return (pte_t
) { PVOP_CALL1(unsigned long, make_pte
, val
) };
867 static inline pgd_t
__pgd(unsigned long val
)
869 return (pgd_t
) { PVOP_CALL1(unsigned long, make_pgd
, val
) };
872 static inline unsigned long pte_val(pte_t x
)
874 return PVOP_CALL1(unsigned long, pte_val
, x
.pte_low
);
877 static inline unsigned long pgd_val(pgd_t x
)
879 return PVOP_CALL1(unsigned long, pgd_val
, x
.pgd
);
882 static inline void set_pte(pte_t
*ptep
, pte_t pteval
)
884 PVOP_VCALL2(set_pte
, ptep
, pteval
.pte_low
);
887 static inline void set_pte_at(struct mm_struct
*mm
, unsigned long addr
,
888 pte_t
*ptep
, pte_t pteval
)
890 PVOP_VCALL4(set_pte_at
, mm
, addr
, ptep
, pteval
.pte_low
);
893 static inline void set_pmd(pmd_t
*pmdp
, pmd_t pmdval
)
895 PVOP_VCALL2(set_pmd
, pmdp
, pmdval
.pud
.pgd
.pgd
);
897 #endif /* CONFIG_X86_PAE */
899 #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
900 static inline void arch_enter_lazy_cpu_mode(void)
902 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_CPU
);
905 static inline void arch_leave_lazy_cpu_mode(void)
907 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_NONE
);
910 static inline void arch_flush_lazy_cpu_mode(void)
912 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_FLUSH
);
916 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
917 static inline void arch_enter_lazy_mmu_mode(void)
919 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_MMU
);
922 static inline void arch_leave_lazy_mmu_mode(void)
924 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_NONE
);
927 static inline void arch_flush_lazy_mmu_mode(void)
929 PVOP_VCALL1(set_lazy_mode
, PARAVIRT_LAZY_FLUSH
);
932 void _paravirt_nop(void);
933 #define paravirt_nop ((void *)_paravirt_nop)
935 /* These all sit in the .parainstructions section to tell us what to patch. */
936 struct paravirt_patch_site
{
937 u8
*instr
; /* original instructions */
938 u8 instrtype
; /* type of this instruction */
939 u8 len
; /* length of original instruction */
940 u16 clobbers
; /* what registers you may clobber */
943 extern struct paravirt_patch_site __parainstructions
[],
944 __parainstructions_end
[];
946 static inline unsigned long __raw_local_save_flags(void)
950 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
952 "popl %%edx; popl %%ecx")
954 : paravirt_type(save_fl
),
955 paravirt_clobber(CLBR_EAX
)
960 static inline void raw_local_irq_restore(unsigned long f
)
962 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
964 "popl %%edx; popl %%ecx")
967 paravirt_type(restore_fl
),
968 paravirt_clobber(CLBR_EAX
)
972 static inline void raw_local_irq_disable(void)
974 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
976 "popl %%edx; popl %%ecx")
978 : paravirt_type(irq_disable
),
979 paravirt_clobber(CLBR_EAX
)
980 : "memory", "eax", "cc");
983 static inline void raw_local_irq_enable(void)
985 asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;"
987 "popl %%edx; popl %%ecx")
989 : paravirt_type(irq_enable
),
990 paravirt_clobber(CLBR_EAX
)
991 : "memory", "eax", "cc");
994 static inline unsigned long __raw_local_irq_save(void)
998 f
= __raw_local_save_flags();
999 raw_local_irq_disable();
1003 #define CLI_STRING \
1004 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1005 "call *paravirt_ops+%c[paravirt_cli_type]*4;" \
1006 "popl %%edx; popl %%ecx", \
1007 "%c[paravirt_cli_type]", "%c[paravirt_clobber]")
1009 #define STI_STRING \
1010 _paravirt_alt("pushl %%ecx; pushl %%edx;" \
1011 "call *paravirt_ops+%c[paravirt_sti_type]*4;" \
1012 "popl %%edx; popl %%ecx", \
1013 "%c[paravirt_sti_type]", "%c[paravirt_clobber]")
1015 #define CLI_STI_CLOBBERS , "%eax"
1016 #define CLI_STI_INPUT_ARGS \
1018 [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \
1019 [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \
1020 paravirt_clobber(CLBR_EAX)
1022 /* Make sure as little as possible of this mess escapes. */
1023 #undef PARAVIRT_CALL
1037 #else /* __ASSEMBLY__ */
1039 #define PARA_PATCH(off) ((off) / 4)
1041 #define PARA_SITE(ptype, clobbers, ops) \
1045 .pushsection .parainstructions,"a"; \
1052 #define INTERRUPT_RETURN \
1053 PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \
1054 jmp *%cs:paravirt_ops+PARAVIRT_iret)
1056 #define DISABLE_INTERRUPTS(clobbers) \
1057 PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \
1058 pushl %eax; pushl %ecx; pushl %edx; \
1059 call *%cs:paravirt_ops+PARAVIRT_irq_disable; \
1060 popl %edx; popl %ecx; popl %eax) \
1062 #define ENABLE_INTERRUPTS(clobbers) \
1063 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \
1064 pushl %eax; pushl %ecx; pushl %edx; \
1065 call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
1066 popl %edx; popl %ecx; popl %eax)
1068 #define ENABLE_INTERRUPTS_SYSEXIT \
1069 PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \
1070 jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
1072 #define GET_CR0_INTO_EAX \
1073 push %ecx; push %edx; \
1074 call *paravirt_ops+PARAVIRT_read_cr0; \
1077 #endif /* __ASSEMBLY__ */
1078 #endif /* CONFIG_PARAVIRT */
1079 #endif /* __ASM_PARAVIRT_H */