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d3561b7f RR |
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. */ | |
b239fb25 JF |
5 | |
6 | #ifdef CONFIG_PARAVIRT | |
139ec7c4 | 7 | #include <linux/stringify.h> |
da181a8b | 8 | #include <asm/page.h> |
d3561b7f | 9 | |
139ec7c4 RR |
10 | /* These are the most performance critical ops, so we want to be able to patch |
11 | * callers */ | |
12 | #define PARAVIRT_IRQ_DISABLE 0 | |
13 | #define PARAVIRT_IRQ_ENABLE 1 | |
14 | #define PARAVIRT_RESTORE_FLAGS 2 | |
15 | #define PARAVIRT_SAVE_FLAGS 3 | |
16 | #define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4 | |
17 | #define PARAVIRT_INTERRUPT_RETURN 5 | |
18 | #define PARAVIRT_STI_SYSEXIT 6 | |
19 | ||
20 | /* Bitmask of what can be clobbered: usually at least eax. */ | |
21 | #define CLBR_NONE 0x0 | |
22 | #define CLBR_EAX 0x1 | |
23 | #define CLBR_ECX 0x2 | |
24 | #define CLBR_EDX 0x4 | |
25 | #define CLBR_ANY 0x7 | |
26 | ||
d3561b7f | 27 | #ifndef __ASSEMBLY__ |
3dc494e8 JF |
28 | #include <linux/types.h> |
29 | ||
d3561b7f RR |
30 | struct thread_struct; |
31 | struct Xgt_desc_struct; | |
32 | struct tss_struct; | |
da181a8b | 33 | struct mm_struct; |
90a0a06a | 34 | struct desc_struct; |
d3561b7f RR |
35 | struct paravirt_ops |
36 | { | |
37 | unsigned int kernel_rpl; | |
5311ab62 | 38 | int shared_kernel_pmd; |
d3561b7f RR |
39 | int paravirt_enabled; |
40 | const char *name; | |
41 | ||
139ec7c4 RR |
42 | /* |
43 | * Patch may replace one of the defined code sequences with arbitrary | |
44 | * code, subject to the same register constraints. This generally | |
45 | * means the code is not free to clobber any registers other than EAX. | |
46 | * The patch function should return the number of bytes of code | |
47 | * generated, as we nop pad the rest in generic code. | |
48 | */ | |
49 | unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len); | |
50 | ||
d3561b7f RR |
51 | void (*arch_setup)(void); |
52 | char *(*memory_setup)(void); | |
53 | void (*init_IRQ)(void); | |
54 | ||
b239fb25 JF |
55 | void (*pagetable_setup_start)(pgd_t *pgd_base); |
56 | void (*pagetable_setup_done)(pgd_t *pgd_base); | |
57 | ||
d3561b7f RR |
58 | void (*banner)(void); |
59 | ||
60 | unsigned long (*get_wallclock)(void); | |
61 | int (*set_wallclock)(unsigned long); | |
62 | void (*time_init)(void); | |
63 | ||
1a1eecd1 | 64 | void (*cpuid)(unsigned int *eax, unsigned int *ebx, |
d3561b7f RR |
65 | unsigned int *ecx, unsigned int *edx); |
66 | ||
1a1eecd1 AK |
67 | unsigned long (*get_debugreg)(int regno); |
68 | void (*set_debugreg)(int regno, unsigned long value); | |
d3561b7f | 69 | |
1a1eecd1 | 70 | void (*clts)(void); |
d3561b7f | 71 | |
1a1eecd1 AK |
72 | unsigned long (*read_cr0)(void); |
73 | void (*write_cr0)(unsigned long); | |
d3561b7f | 74 | |
1a1eecd1 AK |
75 | unsigned long (*read_cr2)(void); |
76 | void (*write_cr2)(unsigned long); | |
d3561b7f | 77 | |
1a1eecd1 AK |
78 | unsigned long (*read_cr3)(void); |
79 | void (*write_cr3)(unsigned long); | |
d3561b7f | 80 | |
1a1eecd1 AK |
81 | unsigned long (*read_cr4_safe)(void); |
82 | unsigned long (*read_cr4)(void); | |
83 | void (*write_cr4)(unsigned long); | |
d3561b7f | 84 | |
1a1eecd1 AK |
85 | unsigned long (*save_fl)(void); |
86 | void (*restore_fl)(unsigned long); | |
87 | void (*irq_disable)(void); | |
88 | void (*irq_enable)(void); | |
89 | void (*safe_halt)(void); | |
90 | void (*halt)(void); | |
91 | void (*wbinvd)(void); | |
d3561b7f RR |
92 | |
93 | /* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ | |
1a1eecd1 AK |
94 | u64 (*read_msr)(unsigned int msr, int *err); |
95 | int (*write_msr)(unsigned int msr, u64 val); | |
96 | ||
97 | u64 (*read_tsc)(void); | |
98 | u64 (*read_pmc)(void); | |
6cb9a835 | 99 | u64 (*get_scheduled_cycles)(void); |
1182d852 | 100 | unsigned long (*get_cpu_khz)(void); |
1a1eecd1 AK |
101 | |
102 | void (*load_tr_desc)(void); | |
103 | void (*load_gdt)(const struct Xgt_desc_struct *); | |
104 | void (*load_idt)(const struct Xgt_desc_struct *); | |
105 | void (*store_gdt)(struct Xgt_desc_struct *); | |
106 | void (*store_idt)(struct Xgt_desc_struct *); | |
107 | void (*set_ldt)(const void *desc, unsigned entries); | |
108 | unsigned long (*store_tr)(void); | |
109 | void (*load_tls)(struct thread_struct *t, unsigned int cpu); | |
90a0a06a RR |
110 | void (*write_ldt_entry)(struct desc_struct *, |
111 | int entrynum, u32 low, u32 high); | |
112 | void (*write_gdt_entry)(struct desc_struct *, | |
113 | int entrynum, u32 low, u32 high); | |
114 | void (*write_idt_entry)(struct desc_struct *, | |
115 | int entrynum, u32 low, u32 high); | |
116 | void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t); | |
d3561b7f | 117 | |
1a1eecd1 | 118 | void (*set_iopl_mask)(unsigned mask); |
d3561b7f | 119 | |
1a1eecd1 | 120 | void (*io_delay)(void); |
d3561b7f | 121 | |
d6dd61c8 JF |
122 | void (*activate_mm)(struct mm_struct *prev, |
123 | struct mm_struct *next); | |
124 | void (*dup_mmap)(struct mm_struct *oldmm, | |
125 | struct mm_struct *mm); | |
126 | void (*exit_mmap)(struct mm_struct *mm); | |
127 | ||
13623d79 | 128 | #ifdef CONFIG_X86_LOCAL_APIC |
1a1eecd1 AK |
129 | void (*apic_write)(unsigned long reg, unsigned long v); |
130 | void (*apic_write_atomic)(unsigned long reg, unsigned long v); | |
131 | unsigned long (*apic_read)(unsigned long reg); | |
bbab4f3b ZA |
132 | void (*setup_boot_clock)(void); |
133 | void (*setup_secondary_clock)(void); | |
13623d79 RR |
134 | #endif |
135 | ||
1a1eecd1 AK |
136 | void (*flush_tlb_user)(void); |
137 | void (*flush_tlb_kernel)(void); | |
138 | void (*flush_tlb_single)(u32 addr); | |
139 | ||
192cd59b | 140 | void (*map_pt_hook)(int type, pte_t *va, u32 pfn); |
9a1c13e9 | 141 | |
1a1eecd1 AK |
142 | void (*alloc_pt)(u32 pfn); |
143 | void (*alloc_pd)(u32 pfn); | |
144 | void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count); | |
145 | void (*release_pt)(u32 pfn); | |
146 | void (*release_pd)(u32 pfn); | |
147 | ||
148 | void (*set_pte)(pte_t *ptep, pte_t pteval); | |
3dc494e8 | 149 | void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval); |
1a1eecd1 | 150 | void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); |
3dc494e8 JF |
151 | void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
152 | void (*pte_update_defer)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); | |
153 | ||
154 | pte_t (*ptep_get_and_clear)(pte_t *ptep); | |
155 | ||
da181a8b | 156 | #ifdef CONFIG_X86_PAE |
1a1eecd1 | 157 | void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); |
3dc494e8 | 158 | void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); |
1a1eecd1 | 159 | void (*set_pud)(pud_t *pudp, pud_t pudval); |
3dc494e8 | 160 | void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
1a1eecd1 | 161 | void (*pmd_clear)(pmd_t *pmdp); |
3dc494e8 JF |
162 | |
163 | unsigned long long (*pte_val)(pte_t); | |
164 | unsigned long long (*pmd_val)(pmd_t); | |
165 | unsigned long long (*pgd_val)(pgd_t); | |
166 | ||
167 | pte_t (*make_pte)(unsigned long long pte); | |
168 | pmd_t (*make_pmd)(unsigned long long pmd); | |
169 | pgd_t (*make_pgd)(unsigned long long pgd); | |
170 | #else | |
171 | unsigned long (*pte_val)(pte_t); | |
172 | unsigned long (*pgd_val)(pgd_t); | |
173 | ||
174 | pte_t (*make_pte)(unsigned long pte); | |
175 | pgd_t (*make_pgd)(unsigned long pgd); | |
da181a8b RR |
176 | #endif |
177 | ||
1a1eecd1 | 178 | void (*set_lazy_mode)(int mode); |
9226d125 | 179 | |
d3561b7f | 180 | /* These two are jmp to, not actually called. */ |
1a1eecd1 AK |
181 | void (*irq_enable_sysexit)(void); |
182 | void (*iret)(void); | |
ae5da273 | 183 | |
1a1eecd1 | 184 | void (*startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp); |
d3561b7f RR |
185 | }; |
186 | ||
c9ccf30d RR |
187 | /* Mark a paravirt probe function. */ |
188 | #define paravirt_probe(fn) \ | |
189 | static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \ | |
190 | __attribute__((__section__(".paravirtprobe"))) = fn | |
191 | ||
d3561b7f RR |
192 | extern struct paravirt_ops paravirt_ops; |
193 | ||
194 | #define paravirt_enabled() (paravirt_ops.paravirt_enabled) | |
195 | ||
196 | static inline void load_esp0(struct tss_struct *tss, | |
197 | struct thread_struct *thread) | |
198 | { | |
199 | paravirt_ops.load_esp0(tss, thread); | |
200 | } | |
201 | ||
202 | #define ARCH_SETUP paravirt_ops.arch_setup(); | |
203 | static inline unsigned long get_wallclock(void) | |
204 | { | |
205 | return paravirt_ops.get_wallclock(); | |
206 | } | |
207 | ||
208 | static inline int set_wallclock(unsigned long nowtime) | |
209 | { | |
210 | return paravirt_ops.set_wallclock(nowtime); | |
211 | } | |
212 | ||
e30fab3a | 213 | static inline void (*choose_time_init(void))(void) |
d3561b7f | 214 | { |
e30fab3a | 215 | return paravirt_ops.time_init; |
d3561b7f RR |
216 | } |
217 | ||
218 | /* The paravirtualized CPUID instruction. */ | |
219 | static inline void __cpuid(unsigned int *eax, unsigned int *ebx, | |
220 | unsigned int *ecx, unsigned int *edx) | |
221 | { | |
222 | paravirt_ops.cpuid(eax, ebx, ecx, edx); | |
223 | } | |
224 | ||
225 | /* | |
226 | * These special macros can be used to get or set a debugging register | |
227 | */ | |
228 | #define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg) | |
229 | #define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val) | |
230 | ||
231 | #define clts() paravirt_ops.clts() | |
232 | ||
233 | #define read_cr0() paravirt_ops.read_cr0() | |
234 | #define write_cr0(x) paravirt_ops.write_cr0(x) | |
235 | ||
236 | #define read_cr2() paravirt_ops.read_cr2() | |
237 | #define write_cr2(x) paravirt_ops.write_cr2(x) | |
238 | ||
239 | #define read_cr3() paravirt_ops.read_cr3() | |
240 | #define write_cr3(x) paravirt_ops.write_cr3(x) | |
241 | ||
242 | #define read_cr4() paravirt_ops.read_cr4() | |
243 | #define read_cr4_safe(x) paravirt_ops.read_cr4_safe() | |
244 | #define write_cr4(x) paravirt_ops.write_cr4(x) | |
245 | ||
3dc494e8 JF |
246 | #define raw_ptep_get_and_clear(xp) (paravirt_ops.ptep_get_and_clear(xp)) |
247 | ||
d3561b7f RR |
248 | static inline void raw_safe_halt(void) |
249 | { | |
250 | paravirt_ops.safe_halt(); | |
251 | } | |
252 | ||
253 | static inline void halt(void) | |
254 | { | |
255 | paravirt_ops.safe_halt(); | |
256 | } | |
257 | #define wbinvd() paravirt_ops.wbinvd() | |
258 | ||
259 | #define get_kernel_rpl() (paravirt_ops.kernel_rpl) | |
260 | ||
90a0a06a | 261 | /* These should all do BUG_ON(_err), but our headers are too tangled. */ |
d3561b7f RR |
262 | #define rdmsr(msr,val1,val2) do { \ |
263 | int _err; \ | |
264 | u64 _l = paravirt_ops.read_msr(msr,&_err); \ | |
265 | val1 = (u32)_l; \ | |
266 | val2 = _l >> 32; \ | |
267 | } while(0) | |
268 | ||
269 | #define wrmsr(msr,val1,val2) do { \ | |
270 | u64 _l = ((u64)(val2) << 32) | (val1); \ | |
271 | paravirt_ops.write_msr((msr), _l); \ | |
272 | } while(0) | |
273 | ||
274 | #define rdmsrl(msr,val) do { \ | |
275 | int _err; \ | |
276 | val = paravirt_ops.read_msr((msr),&_err); \ | |
277 | } while(0) | |
278 | ||
279 | #define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val))) | |
280 | #define wrmsr_safe(msr,a,b) ({ \ | |
281 | u64 _l = ((u64)(b) << 32) | (a); \ | |
282 | paravirt_ops.write_msr((msr),_l); \ | |
283 | }) | |
284 | ||
285 | /* rdmsr with exception handling */ | |
286 | #define rdmsr_safe(msr,a,b) ({ \ | |
287 | int _err; \ | |
288 | u64 _l = paravirt_ops.read_msr(msr,&_err); \ | |
289 | (*a) = (u32)_l; \ | |
290 | (*b) = _l >> 32; \ | |
291 | _err; }) | |
292 | ||
293 | #define rdtsc(low,high) do { \ | |
294 | u64 _l = paravirt_ops.read_tsc(); \ | |
295 | low = (u32)_l; \ | |
296 | high = _l >> 32; \ | |
297 | } while(0) | |
298 | ||
299 | #define rdtscl(low) do { \ | |
300 | u64 _l = paravirt_ops.read_tsc(); \ | |
301 | low = (int)_l; \ | |
302 | } while(0) | |
303 | ||
304 | #define rdtscll(val) (val = paravirt_ops.read_tsc()) | |
305 | ||
6cb9a835 | 306 | #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles()) |
1182d852 | 307 | #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) |
6cb9a835 | 308 | |
d3561b7f RR |
309 | #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) |
310 | ||
311 | #define rdpmc(counter,low,high) do { \ | |
312 | u64 _l = paravirt_ops.read_pmc(); \ | |
313 | low = (u32)_l; \ | |
314 | high = _l >> 32; \ | |
315 | } while(0) | |
316 | ||
317 | #define load_TR_desc() (paravirt_ops.load_tr_desc()) | |
318 | #define load_gdt(dtr) (paravirt_ops.load_gdt(dtr)) | |
319 | #define load_idt(dtr) (paravirt_ops.load_idt(dtr)) | |
320 | #define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries))) | |
321 | #define store_gdt(dtr) (paravirt_ops.store_gdt(dtr)) | |
322 | #define store_idt(dtr) (paravirt_ops.store_idt(dtr)) | |
323 | #define store_tr(tr) ((tr) = paravirt_ops.store_tr()) | |
324 | #define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu))) | |
325 | #define write_ldt_entry(dt, entry, low, high) \ | |
326 | (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high))) | |
327 | #define write_gdt_entry(dt, entry, low, high) \ | |
328 | (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high))) | |
329 | #define write_idt_entry(dt, entry, low, high) \ | |
330 | (paravirt_ops.write_idt_entry((dt), (entry), (low), (high))) | |
331 | #define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask)) | |
332 | ||
3dc494e8 JF |
333 | #define __pte(x) paravirt_ops.make_pte(x) |
334 | #define __pgd(x) paravirt_ops.make_pgd(x) | |
335 | ||
336 | #define pte_val(x) paravirt_ops.pte_val(x) | |
337 | #define pgd_val(x) paravirt_ops.pgd_val(x) | |
338 | ||
339 | #ifdef CONFIG_X86_PAE | |
340 | #define __pmd(x) paravirt_ops.make_pmd(x) | |
341 | #define pmd_val(x) paravirt_ops.pmd_val(x) | |
342 | #endif | |
343 | ||
d3561b7f RR |
344 | /* The paravirtualized I/O functions */ |
345 | static inline void slow_down_io(void) { | |
346 | paravirt_ops.io_delay(); | |
347 | #ifdef REALLY_SLOW_IO | |
348 | paravirt_ops.io_delay(); | |
349 | paravirt_ops.io_delay(); | |
350 | paravirt_ops.io_delay(); | |
351 | #endif | |
352 | } | |
353 | ||
13623d79 RR |
354 | #ifdef CONFIG_X86_LOCAL_APIC |
355 | /* | |
356 | * Basic functions accessing APICs. | |
357 | */ | |
358 | static inline void apic_write(unsigned long reg, unsigned long v) | |
359 | { | |
360 | paravirt_ops.apic_write(reg,v); | |
361 | } | |
362 | ||
363 | static inline void apic_write_atomic(unsigned long reg, unsigned long v) | |
364 | { | |
365 | paravirt_ops.apic_write_atomic(reg,v); | |
366 | } | |
367 | ||
368 | static inline unsigned long apic_read(unsigned long reg) | |
369 | { | |
370 | return paravirt_ops.apic_read(reg); | |
371 | } | |
bbab4f3b ZA |
372 | |
373 | static inline void setup_boot_clock(void) | |
374 | { | |
375 | paravirt_ops.setup_boot_clock(); | |
376 | } | |
377 | ||
378 | static inline void setup_secondary_clock(void) | |
379 | { | |
380 | paravirt_ops.setup_secondary_clock(); | |
381 | } | |
13623d79 RR |
382 | #endif |
383 | ||
b239fb25 JF |
384 | static inline void paravirt_pagetable_setup_start(pgd_t *base) |
385 | { | |
386 | if (paravirt_ops.pagetable_setup_start) | |
387 | (*paravirt_ops.pagetable_setup_start)(base); | |
388 | } | |
389 | ||
390 | static inline void paravirt_pagetable_setup_done(pgd_t *base) | |
391 | { | |
392 | if (paravirt_ops.pagetable_setup_done) | |
393 | (*paravirt_ops.pagetable_setup_done)(base); | |
394 | } | |
3dc494e8 | 395 | |
ae5da273 ZA |
396 | #ifdef CONFIG_SMP |
397 | static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip, | |
398 | unsigned long start_esp) | |
399 | { | |
400 | return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp); | |
401 | } | |
402 | #endif | |
13623d79 | 403 | |
d6dd61c8 JF |
404 | static inline void paravirt_activate_mm(struct mm_struct *prev, |
405 | struct mm_struct *next) | |
406 | { | |
407 | paravirt_ops.activate_mm(prev, next); | |
408 | } | |
409 | ||
410 | static inline void arch_dup_mmap(struct mm_struct *oldmm, | |
411 | struct mm_struct *mm) | |
412 | { | |
413 | paravirt_ops.dup_mmap(oldmm, mm); | |
414 | } | |
415 | ||
416 | static inline void arch_exit_mmap(struct mm_struct *mm) | |
417 | { | |
418 | paravirt_ops.exit_mmap(mm); | |
419 | } | |
420 | ||
da181a8b RR |
421 | #define __flush_tlb() paravirt_ops.flush_tlb_user() |
422 | #define __flush_tlb_global() paravirt_ops.flush_tlb_kernel() | |
423 | #define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr) | |
424 | ||
9a1c13e9 ZA |
425 | #define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn) |
426 | ||
c119ecce ZA |
427 | #define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn) |
428 | #define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn) | |
429 | ||
430 | #define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn) | |
431 | #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \ | |
432 | paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count) | |
433 | #define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn) | |
434 | ||
da181a8b RR |
435 | static inline void set_pte(pte_t *ptep, pte_t pteval) |
436 | { | |
437 | paravirt_ops.set_pte(ptep, pteval); | |
438 | } | |
439 | ||
3dc494e8 JF |
440 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
441 | pte_t *ptep, pte_t pteval) | |
da181a8b RR |
442 | { |
443 | paravirt_ops.set_pte_at(mm, addr, ptep, pteval); | |
444 | } | |
445 | ||
446 | static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval) | |
447 | { | |
448 | paravirt_ops.set_pmd(pmdp, pmdval); | |
449 | } | |
450 | ||
451 | static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep) | |
452 | { | |
453 | paravirt_ops.pte_update(mm, addr, ptep); | |
454 | } | |
455 | ||
456 | static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep) | |
457 | { | |
458 | paravirt_ops.pte_update_defer(mm, addr, ptep); | |
459 | } | |
460 | ||
461 | #ifdef CONFIG_X86_PAE | |
462 | static inline void set_pte_atomic(pte_t *ptep, pte_t pteval) | |
463 | { | |
464 | paravirt_ops.set_pte_atomic(ptep, pteval); | |
465 | } | |
466 | ||
467 | static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) | |
468 | { | |
469 | paravirt_ops.set_pte_present(mm, addr, ptep, pte); | |
470 | } | |
471 | ||
472 | static inline void set_pud(pud_t *pudp, pud_t pudval) | |
473 | { | |
474 | paravirt_ops.set_pud(pudp, pudval); | |
475 | } | |
476 | ||
477 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
478 | { | |
479 | paravirt_ops.pte_clear(mm, addr, ptep); | |
480 | } | |
481 | ||
482 | static inline void pmd_clear(pmd_t *pmdp) | |
483 | { | |
484 | paravirt_ops.pmd_clear(pmdp); | |
485 | } | |
486 | #endif | |
487 | ||
9226d125 ZA |
488 | /* Lazy mode for batching updates / context switch */ |
489 | #define PARAVIRT_LAZY_NONE 0 | |
490 | #define PARAVIRT_LAZY_MMU 1 | |
491 | #define PARAVIRT_LAZY_CPU 2 | |
49f19710 | 492 | #define PARAVIRT_LAZY_FLUSH 3 |
9226d125 ZA |
493 | |
494 | #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE | |
495 | #define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU) | |
496 | #define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE) | |
49f19710 | 497 | #define arch_flush_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH) |
9226d125 ZA |
498 | |
499 | #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE | |
500 | #define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU) | |
501 | #define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE) | |
49f19710 | 502 | #define arch_flush_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH) |
9226d125 | 503 | |
45876233 JF |
504 | void _paravirt_nop(void); |
505 | #define paravirt_nop ((void *)_paravirt_nop) | |
506 | ||
139ec7c4 | 507 | /* These all sit in the .parainstructions section to tell us what to patch. */ |
98de032b | 508 | struct paravirt_patch_site { |
139ec7c4 RR |
509 | u8 *instr; /* original instructions */ |
510 | u8 instrtype; /* type of this instruction */ | |
511 | u8 len; /* length of original instruction */ | |
512 | u16 clobbers; /* what registers you may clobber */ | |
513 | }; | |
514 | ||
98de032b JF |
515 | extern struct paravirt_patch_site __parainstructions[], |
516 | __parainstructions_end[]; | |
517 | ||
139ec7c4 RR |
518 | #define paravirt_alt(insn_string, typenum, clobber) \ |
519 | "771:\n\t" insn_string "\n" "772:\n" \ | |
520 | ".pushsection .parainstructions,\"a\"\n" \ | |
521 | " .long 771b\n" \ | |
522 | " .byte " __stringify(typenum) "\n" \ | |
523 | " .byte 772b-771b\n" \ | |
524 | " .short " __stringify(clobber) "\n" \ | |
525 | ".popsection" | |
526 | ||
527 | static inline unsigned long __raw_local_save_flags(void) | |
528 | { | |
529 | unsigned long f; | |
530 | ||
531 | __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" | |
532 | "call *%1;" | |
533 | "popl %%edx; popl %%ecx", | |
534 | PARAVIRT_SAVE_FLAGS, CLBR_NONE) | |
535 | : "=a"(f): "m"(paravirt_ops.save_fl) | |
536 | : "memory", "cc"); | |
537 | return f; | |
538 | } | |
539 | ||
540 | static inline void raw_local_irq_restore(unsigned long f) | |
541 | { | |
542 | __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" | |
543 | "call *%1;" | |
544 | "popl %%edx; popl %%ecx", | |
545 | PARAVIRT_RESTORE_FLAGS, CLBR_EAX) | |
546 | : "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f) | |
547 | : "memory", "cc"); | |
548 | } | |
549 | ||
550 | static inline void raw_local_irq_disable(void) | |
551 | { | |
552 | __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" | |
553 | "call *%0;" | |
554 | "popl %%edx; popl %%ecx", | |
555 | PARAVIRT_IRQ_DISABLE, CLBR_EAX) | |
556 | : : "m" (paravirt_ops.irq_disable) | |
557 | : "memory", "eax", "cc"); | |
558 | } | |
559 | ||
560 | static inline void raw_local_irq_enable(void) | |
561 | { | |
562 | __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" | |
563 | "call *%0;" | |
564 | "popl %%edx; popl %%ecx", | |
565 | PARAVIRT_IRQ_ENABLE, CLBR_EAX) | |
566 | : : "m" (paravirt_ops.irq_enable) | |
567 | : "memory", "eax", "cc"); | |
568 | } | |
569 | ||
570 | static inline unsigned long __raw_local_irq_save(void) | |
571 | { | |
572 | unsigned long f; | |
573 | ||
574 | __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" | |
575 | "call *%1; pushl %%eax;" | |
576 | "call *%2; popl %%eax;" | |
577 | "popl %%edx; popl %%ecx", | |
578 | PARAVIRT_SAVE_FLAGS_IRQ_DISABLE, | |
579 | CLBR_NONE) | |
580 | : "=a"(f) | |
581 | : "m" (paravirt_ops.save_fl), | |
582 | "m" (paravirt_ops.irq_disable) | |
583 | : "memory", "cc"); | |
584 | return f; | |
585 | } | |
586 | ||
587 | #define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \ | |
588 | "call *paravirt_ops+%c[irq_disable];" \ | |
589 | "popl %%edx; popl %%ecx", \ | |
590 | PARAVIRT_IRQ_DISABLE, CLBR_EAX) | |
591 | ||
592 | #define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \ | |
593 | "call *paravirt_ops+%c[irq_enable];" \ | |
594 | "popl %%edx; popl %%ecx", \ | |
595 | PARAVIRT_IRQ_ENABLE, CLBR_EAX) | |
596 | #define CLI_STI_CLOBBERS , "%eax" | |
597 | #define CLI_STI_INPUT_ARGS \ | |
598 | , \ | |
599 | [irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \ | |
600 | [irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable)) | |
601 | ||
d3561b7f RR |
602 | #else /* __ASSEMBLY__ */ |
603 | ||
139ec7c4 RR |
604 | #define PARA_PATCH(ptype, clobbers, ops) \ |
605 | 771:; \ | |
606 | ops; \ | |
607 | 772:; \ | |
608 | .pushsection .parainstructions,"a"; \ | |
609 | .long 771b; \ | |
610 | .byte ptype; \ | |
611 | .byte 772b-771b; \ | |
612 | .short clobbers; \ | |
613 | .popsection | |
614 | ||
615 | #define INTERRUPT_RETURN \ | |
616 | PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \ | |
617 | jmp *%cs:paravirt_ops+PARAVIRT_iret) | |
618 | ||
619 | #define DISABLE_INTERRUPTS(clobbers) \ | |
620 | PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers, \ | |
621 | pushl %ecx; pushl %edx; \ | |
622 | call *paravirt_ops+PARAVIRT_irq_disable; \ | |
623 | popl %edx; popl %ecx) \ | |
624 | ||
625 | #define ENABLE_INTERRUPTS(clobbers) \ | |
626 | PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers, \ | |
627 | pushl %ecx; pushl %edx; \ | |
628 | call *%cs:paravirt_ops+PARAVIRT_irq_enable; \ | |
629 | popl %edx; popl %ecx) | |
630 | ||
631 | #define ENABLE_INTERRUPTS_SYSEXIT \ | |
632 | PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY, \ | |
633 | jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit) | |
634 | ||
635 | #define GET_CR0_INTO_EAX \ | |
636 | call *paravirt_ops+PARAVIRT_read_cr0 | |
637 | ||
d3561b7f RR |
638 | #endif /* __ASSEMBLY__ */ |
639 | #endif /* CONFIG_PARAVIRT */ | |
640 | #endif /* __ASM_PARAVIRT_H */ |