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1965aae3 PA |
1 | #ifndef _ASM_X86_PROCESSOR_H |
2 | #define _ASM_X86_PROCESSOR_H | |
c758ecf6 | 3 | |
053de044 GOC |
4 | #include <asm/processor-flags.h> |
5 | ||
683e0253 GOC |
6 | /* Forward declaration, a strange C thing */ |
7 | struct task_struct; | |
8 | struct mm_struct; | |
9 | ||
2f66dcc9 GOC |
10 | #include <asm/vm86.h> |
11 | #include <asm/math_emu.h> | |
12 | #include <asm/segment.h> | |
2f66dcc9 GOC |
13 | #include <asm/types.h> |
14 | #include <asm/sigcontext.h> | |
15 | #include <asm/current.h> | |
16 | #include <asm/cpufeature.h> | |
c72dcf83 | 17 | #include <asm/system.h> |
2f66dcc9 | 18 | #include <asm/page.h> |
54321d94 | 19 | #include <asm/pgtable_types.h> |
5300db88 | 20 | #include <asm/percpu.h> |
2f66dcc9 GOC |
21 | #include <asm/msr.h> |
22 | #include <asm/desc_defs.h> | |
bd61643e | 23 | #include <asm/nops.h> |
93fa7636 | 24 | #include <asm/ds.h> |
4d46a89e | 25 | |
2f66dcc9 | 26 | #include <linux/personality.h> |
5300db88 GOC |
27 | #include <linux/cpumask.h> |
28 | #include <linux/cache.h> | |
2f66dcc9 | 29 | #include <linux/threads.h> |
5cbc19a9 | 30 | #include <linux/math64.h> |
2f66dcc9 | 31 | #include <linux/init.h> |
c72dcf83 | 32 | |
b332828c | 33 | #define HBP_NUM 4 |
0ccb8acc GOC |
34 | /* |
35 | * Default implementation of macro that returns current | |
36 | * instruction pointer ("program counter"). | |
37 | */ | |
38 | static inline void *current_text_addr(void) | |
39 | { | |
40 | void *pc; | |
4d46a89e IM |
41 | |
42 | asm volatile("mov $1f, %0; 1:":"=r" (pc)); | |
43 | ||
0ccb8acc GOC |
44 | return pc; |
45 | } | |
46 | ||
dbcb4660 | 47 | #ifdef CONFIG_X86_VSMP |
4d46a89e IM |
48 | # define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) |
49 | # define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) | |
dbcb4660 | 50 | #else |
4d46a89e IM |
51 | # define ARCH_MIN_TASKALIGN 16 |
52 | # define ARCH_MIN_MMSTRUCT_ALIGN 0 | |
dbcb4660 GOC |
53 | #endif |
54 | ||
5300db88 GOC |
55 | /* |
56 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
57 | * Members of this structure are referenced in head.S, so think twice | |
58 | * before touching them. [mj] | |
59 | */ | |
60 | ||
61 | struct cpuinfo_x86 { | |
4d46a89e IM |
62 | __u8 x86; /* CPU family */ |
63 | __u8 x86_vendor; /* CPU vendor */ | |
64 | __u8 x86_model; | |
65 | __u8 x86_mask; | |
5300db88 | 66 | #ifdef CONFIG_X86_32 |
4d46a89e IM |
67 | char wp_works_ok; /* It doesn't on 386's */ |
68 | ||
69 | /* Problems on some 486Dx4's and old 386's: */ | |
70 | char hlt_works_ok; | |
71 | char hard_math; | |
72 | char rfu; | |
73 | char fdiv_bug; | |
74 | char f00f_bug; | |
75 | char coma_bug; | |
76 | char pad0; | |
5300db88 | 77 | #else |
4d46a89e | 78 | /* Number of 4K pages in DTLB/ITLB combined(in pages): */ |
b1882e68 | 79 | int x86_tlbsize; |
13c6c532 | 80 | #endif |
4d46a89e IM |
81 | __u8 x86_virt_bits; |
82 | __u8 x86_phys_bits; | |
83 | /* CPUID returned core id bits: */ | |
84 | __u8 x86_coreid_bits; | |
85 | /* Max extended CPUID function supported: */ | |
86 | __u32 extended_cpuid_level; | |
4d46a89e IM |
87 | /* Maximum supported CPUID level, -1=no CPUID: */ |
88 | int cpuid_level; | |
89 | __u32 x86_capability[NCAPINTS]; | |
90 | char x86_vendor_id[16]; | |
91 | char x86_model_id[64]; | |
92 | /* in KB - valid for CPUS which support this call: */ | |
93 | int x86_cache_size; | |
94 | int x86_cache_alignment; /* In bytes */ | |
95 | int x86_power; | |
96 | unsigned long loops_per_jiffy; | |
5300db88 | 97 | #ifdef CONFIG_SMP |
4d46a89e | 98 | /* cpus sharing the last level cache: */ |
155dd720 | 99 | cpumask_var_t llc_shared_map; |
5300db88 | 100 | #endif |
4d46a89e IM |
101 | /* cpuid returned max cores value: */ |
102 | u16 x86_max_cores; | |
103 | u16 apicid; | |
01aaea1a | 104 | u16 initial_apicid; |
4d46a89e | 105 | u16 x86_clflush_size; |
5300db88 | 106 | #ifdef CONFIG_SMP |
4d46a89e IM |
107 | /* number of cores as seen by the OS: */ |
108 | u16 booted_cores; | |
109 | /* Physical processor id: */ | |
110 | u16 phys_proc_id; | |
111 | /* Core id: */ | |
112 | u16 cpu_core_id; | |
113 | /* Index into per_cpu list: */ | |
114 | u16 cpu_index; | |
5300db88 | 115 | #endif |
88b094fb | 116 | unsigned int x86_hyper_vendor; |
5300db88 GOC |
117 | } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
118 | ||
4d46a89e IM |
119 | #define X86_VENDOR_INTEL 0 |
120 | #define X86_VENDOR_CYRIX 1 | |
121 | #define X86_VENDOR_AMD 2 | |
122 | #define X86_VENDOR_UMC 3 | |
4d46a89e IM |
123 | #define X86_VENDOR_CENTAUR 5 |
124 | #define X86_VENDOR_TRANSMETA 7 | |
125 | #define X86_VENDOR_NSC 8 | |
126 | #define X86_VENDOR_NUM 9 | |
127 | ||
128 | #define X86_VENDOR_UNKNOWN 0xff | |
5300db88 | 129 | |
88b094fb AK |
130 | #define X86_HYPER_VENDOR_NONE 0 |
131 | #define X86_HYPER_VENDOR_VMWARE 1 | |
132 | ||
1a53905a GOC |
133 | /* |
134 | * capabilities of CPUs | |
135 | */ | |
4d46a89e IM |
136 | extern struct cpuinfo_x86 boot_cpu_data; |
137 | extern struct cpuinfo_x86 new_cpu_data; | |
138 | ||
139 | extern struct tss_struct doublefault_tss; | |
3e0c3737 YL |
140 | extern __u32 cpu_caps_cleared[NCAPINTS]; |
141 | extern __u32 cpu_caps_set[NCAPINTS]; | |
5300db88 GOC |
142 | |
143 | #ifdef CONFIG_SMP | |
9b8de747 | 144 | DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info); |
5300db88 | 145 | #define cpu_data(cpu) per_cpu(cpu_info, cpu) |
94a1e869 | 146 | #define current_cpu_data __get_cpu_var(cpu_info) |
5300db88 GOC |
147 | #else |
148 | #define cpu_data(cpu) boot_cpu_data | |
149 | #define current_cpu_data boot_cpu_data | |
150 | #endif | |
151 | ||
1c6c727d JS |
152 | extern const struct seq_operations cpuinfo_op; |
153 | ||
3d3f487c GC |
154 | static inline int hlt_works(int cpu) |
155 | { | |
156 | #ifdef CONFIG_X86_32 | |
157 | return cpu_data(cpu).hlt_works_ok; | |
158 | #else | |
159 | return 1; | |
160 | #endif | |
161 | } | |
162 | ||
4d46a89e IM |
163 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) |
164 | ||
165 | extern void cpu_detect(struct cpuinfo_x86 *c); | |
1a53905a | 166 | |
8fd329a1 JS |
167 | extern struct pt_regs *idle_regs(struct pt_regs *); |
168 | ||
f580366f | 169 | extern void early_cpu_init(void); |
1a53905a GOC |
170 | extern void identify_boot_cpu(void); |
171 | extern void identify_secondary_cpu(struct cpuinfo_x86 *); | |
5300db88 GOC |
172 | extern void print_cpu_info(struct cpuinfo_x86 *); |
173 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); | |
174 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); | |
175 | extern unsigned short num_cache_leaves; | |
176 | ||
bbb65d2d | 177 | extern void detect_extended_topology(struct cpuinfo_x86 *c); |
1a53905a | 178 | extern void detect_ht(struct cpuinfo_x86 *c); |
1a53905a | 179 | |
c758ecf6 | 180 | static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
4d46a89e | 181 | unsigned int *ecx, unsigned int *edx) |
c758ecf6 GOC |
182 | { |
183 | /* ecx is often an input as well as an output. */ | |
cca2e6f8 JP |
184 | asm("cpuid" |
185 | : "=a" (*eax), | |
186 | "=b" (*ebx), | |
187 | "=c" (*ecx), | |
188 | "=d" (*edx) | |
189 | : "0" (*eax), "2" (*ecx)); | |
c758ecf6 GOC |
190 | } |
191 | ||
c72dcf83 GOC |
192 | static inline void load_cr3(pgd_t *pgdir) |
193 | { | |
194 | write_cr3(__pa(pgdir)); | |
195 | } | |
c758ecf6 | 196 | |
ca241c75 GOC |
197 | #ifdef CONFIG_X86_32 |
198 | /* This is the TSS defined by the hardware. */ | |
199 | struct x86_hw_tss { | |
4d46a89e IM |
200 | unsigned short back_link, __blh; |
201 | unsigned long sp0; | |
202 | unsigned short ss0, __ss0h; | |
203 | unsigned long sp1; | |
204 | /* ss1 caches MSR_IA32_SYSENTER_CS: */ | |
205 | unsigned short ss1, __ss1h; | |
206 | unsigned long sp2; | |
207 | unsigned short ss2, __ss2h; | |
208 | unsigned long __cr3; | |
209 | unsigned long ip; | |
210 | unsigned long flags; | |
211 | unsigned long ax; | |
212 | unsigned long cx; | |
213 | unsigned long dx; | |
214 | unsigned long bx; | |
215 | unsigned long sp; | |
216 | unsigned long bp; | |
217 | unsigned long si; | |
218 | unsigned long di; | |
219 | unsigned short es, __esh; | |
220 | unsigned short cs, __csh; | |
221 | unsigned short ss, __ssh; | |
222 | unsigned short ds, __dsh; | |
223 | unsigned short fs, __fsh; | |
224 | unsigned short gs, __gsh; | |
225 | unsigned short ldt, __ldth; | |
226 | unsigned short trace; | |
227 | unsigned short io_bitmap_base; | |
228 | ||
ca241c75 GOC |
229 | } __attribute__((packed)); |
230 | #else | |
231 | struct x86_hw_tss { | |
4d46a89e IM |
232 | u32 reserved1; |
233 | u64 sp0; | |
234 | u64 sp1; | |
235 | u64 sp2; | |
236 | u64 reserved2; | |
237 | u64 ist[7]; | |
238 | u32 reserved3; | |
239 | u32 reserved4; | |
240 | u16 reserved5; | |
241 | u16 io_bitmap_base; | |
242 | ||
ca241c75 GOC |
243 | } __attribute__((packed)) ____cacheline_aligned; |
244 | #endif | |
245 | ||
246 | /* | |
4d46a89e | 247 | * IO-bitmap sizes: |
ca241c75 | 248 | */ |
4d46a89e IM |
249 | #define IO_BITMAP_BITS 65536 |
250 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) | |
251 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) | |
252 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) | |
253 | #define INVALID_IO_BITMAP_OFFSET 0x8000 | |
ca241c75 GOC |
254 | |
255 | struct tss_struct { | |
4d46a89e IM |
256 | /* |
257 | * The hardware state: | |
258 | */ | |
259 | struct x86_hw_tss x86_tss; | |
ca241c75 GOC |
260 | |
261 | /* | |
262 | * The extra 1 is there because the CPU will access an | |
263 | * additional byte beyond the end of the IO permission | |
264 | * bitmap. The extra byte must be all 1 bits, and must | |
265 | * be within the limit. | |
266 | */ | |
4d46a89e | 267 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; |
4d46a89e | 268 | |
ca241c75 | 269 | /* |
4d46a89e | 270 | * .. and then another 0x100 bytes for the emergency kernel stack: |
ca241c75 | 271 | */ |
4d46a89e IM |
272 | unsigned long stack[64]; |
273 | ||
84e65b0a | 274 | } ____cacheline_aligned; |
ca241c75 | 275 | |
9b8de747 | 276 | DECLARE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss); |
ca241c75 | 277 | |
4d46a89e IM |
278 | /* |
279 | * Save the original ist values for checking stack pointers during debugging | |
280 | */ | |
1a53905a | 281 | struct orig_ist { |
4d46a89e | 282 | unsigned long ist[7]; |
1a53905a GOC |
283 | }; |
284 | ||
99f8ecdf | 285 | #define MXCSR_DEFAULT 0x1f80 |
46265df0 | 286 | |
99f8ecdf | 287 | struct i387_fsave_struct { |
ca9cda2f IM |
288 | u32 cwd; /* FPU Control Word */ |
289 | u32 swd; /* FPU Status Word */ | |
290 | u32 twd; /* FPU Tag Word */ | |
291 | u32 fip; /* FPU IP Offset */ | |
292 | u32 fcs; /* FPU IP Selector */ | |
293 | u32 foo; /* FPU Operand Pointer Offset */ | |
294 | u32 fos; /* FPU Operand Pointer Selector */ | |
295 | ||
296 | /* 8*10 bytes for each FP-reg = 80 bytes: */ | |
4d46a89e | 297 | u32 st_space[20]; |
ca9cda2f IM |
298 | |
299 | /* Software status information [not touched by FSAVE ]: */ | |
4d46a89e | 300 | u32 status; |
46265df0 GOC |
301 | }; |
302 | ||
46265df0 | 303 | struct i387_fxsave_struct { |
ca9cda2f IM |
304 | u16 cwd; /* Control Word */ |
305 | u16 swd; /* Status Word */ | |
306 | u16 twd; /* Tag Word */ | |
307 | u16 fop; /* Last Instruction Opcode */ | |
99f8ecdf RM |
308 | union { |
309 | struct { | |
ca9cda2f IM |
310 | u64 rip; /* Instruction Pointer */ |
311 | u64 rdp; /* Data Pointer */ | |
99f8ecdf RM |
312 | }; |
313 | struct { | |
ca9cda2f IM |
314 | u32 fip; /* FPU IP Offset */ |
315 | u32 fcs; /* FPU IP Selector */ | |
316 | u32 foo; /* FPU Operand Offset */ | |
317 | u32 fos; /* FPU Operand Selector */ | |
99f8ecdf RM |
318 | }; |
319 | }; | |
ca9cda2f IM |
320 | u32 mxcsr; /* MXCSR Register State */ |
321 | u32 mxcsr_mask; /* MXCSR Mask */ | |
322 | ||
323 | /* 8*16 bytes for each FP-reg = 128 bytes: */ | |
4d46a89e | 324 | u32 st_space[32]; |
ca9cda2f IM |
325 | |
326 | /* 16*16 bytes for each XMM-reg = 256 bytes: */ | |
4d46a89e | 327 | u32 xmm_space[64]; |
ca9cda2f | 328 | |
bdd8caba SS |
329 | u32 padding[12]; |
330 | ||
331 | union { | |
332 | u32 padding1[12]; | |
333 | u32 sw_reserved[12]; | |
334 | }; | |
4d46a89e | 335 | |
46265df0 GOC |
336 | } __attribute__((aligned(16))); |
337 | ||
99f8ecdf | 338 | struct i387_soft_struct { |
4d46a89e IM |
339 | u32 cwd; |
340 | u32 swd; | |
341 | u32 twd; | |
342 | u32 fip; | |
343 | u32 fcs; | |
344 | u32 foo; | |
345 | u32 fos; | |
346 | /* 8*10 bytes for each FP-reg = 80 bytes: */ | |
347 | u32 st_space[20]; | |
348 | u8 ftop; | |
349 | u8 changed; | |
350 | u8 lookahead; | |
351 | u8 no_update; | |
352 | u8 rm; | |
353 | u8 alimit; | |
ae6af41f | 354 | struct math_emu_info *info; |
4d46a89e | 355 | u32 entry_eip; |
99f8ecdf RM |
356 | }; |
357 | ||
a30469e7 SS |
358 | struct ymmh_struct { |
359 | /* 16 * 16 bytes for each YMMH-reg = 256 bytes */ | |
360 | u32 ymmh_space[64]; | |
361 | }; | |
362 | ||
dc1e35c6 SS |
363 | struct xsave_hdr_struct { |
364 | u64 xstate_bv; | |
365 | u64 reserved1[2]; | |
366 | u64 reserved2[5]; | |
367 | } __attribute__((packed)); | |
368 | ||
369 | struct xsave_struct { | |
370 | struct i387_fxsave_struct i387; | |
371 | struct xsave_hdr_struct xsave_hdr; | |
a30469e7 | 372 | struct ymmh_struct ymmh; |
dc1e35c6 SS |
373 | /* new processor state extensions will go here */ |
374 | } __attribute__ ((packed, aligned (64))); | |
375 | ||
61c4628b | 376 | union thread_xstate { |
99f8ecdf | 377 | struct i387_fsave_struct fsave; |
46265df0 | 378 | struct i387_fxsave_struct fxsave; |
4d46a89e | 379 | struct i387_soft_struct soft; |
b359e8a4 | 380 | struct xsave_struct xsave; |
46265df0 GOC |
381 | }; |
382 | ||
fe676203 | 383 | #ifdef CONFIG_X86_64 |
2f66dcc9 | 384 | DECLARE_PER_CPU(struct orig_ist, orig_ist); |
26f80bd6 | 385 | |
947e76cd BG |
386 | union irq_stack_union { |
387 | char irq_stack[IRQ_STACK_SIZE]; | |
388 | /* | |
389 | * GCC hardcodes the stack canary as %gs:40. Since the | |
390 | * irq_stack is the object at %gs:0, we reserve the bottom | |
391 | * 48 bytes of the irq stack for the canary. | |
392 | */ | |
393 | struct { | |
394 | char gs_base[40]; | |
395 | unsigned long stack_canary; | |
396 | }; | |
397 | }; | |
398 | ||
9b8de747 | 399 | DECLARE_PER_CPU_FIRST(union irq_stack_union, irq_stack_union); |
2add8e23 BG |
400 | DECLARE_INIT_PER_CPU(irq_stack_union); |
401 | ||
26f80bd6 | 402 | DECLARE_PER_CPU(char *, irq_stack_ptr); |
9766cdbc JSR |
403 | DECLARE_PER_CPU(unsigned int, irq_count); |
404 | extern unsigned long kernel_eflags; | |
405 | extern asmlinkage void ignore_sysret(void); | |
60a5317f TH |
406 | #else /* X86_64 */ |
407 | #ifdef CONFIG_CC_STACKPROTECTOR | |
1ea0d14e JF |
408 | /* |
409 | * Make sure stack canary segment base is cached-aligned: | |
410 | * "For Intel Atom processors, avoid non zero segment base address | |
411 | * that is not aligned to cache line boundary at all cost." | |
412 | * (Optim Ref Manual Assembly/Compiler Coding Rule 15.) | |
413 | */ | |
414 | struct stack_canary { | |
415 | char __pad[20]; /* canary at %gs:20 */ | |
416 | unsigned long canary; | |
417 | }; | |
53f82452 | 418 | DECLARE_PER_CPU_ALIGNED(struct stack_canary, stack_canary); |
96a388de | 419 | #endif |
60a5317f | 420 | #endif /* X86_64 */ |
c758ecf6 | 421 | |
61c4628b | 422 | extern unsigned int xstate_size; |
aa283f49 SS |
423 | extern void free_thread_xstate(struct task_struct *); |
424 | extern struct kmem_cache *task_xstate_cachep; | |
683e0253 | 425 | |
24f1e32c FW |
426 | struct perf_event; |
427 | ||
cb38d377 | 428 | struct thread_struct { |
4d46a89e IM |
429 | /* Cached TLS descriptors: */ |
430 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; | |
431 | unsigned long sp0; | |
432 | unsigned long sp; | |
cb38d377 | 433 | #ifdef CONFIG_X86_32 |
4d46a89e | 434 | unsigned long sysenter_cs; |
cb38d377 | 435 | #else |
4d46a89e IM |
436 | unsigned long usersp; /* Copy from PDA */ |
437 | unsigned short es; | |
438 | unsigned short ds; | |
439 | unsigned short fsindex; | |
440 | unsigned short gsindex; | |
cb38d377 | 441 | #endif |
0c23590f | 442 | #ifdef CONFIG_X86_32 |
4d46a89e | 443 | unsigned long ip; |
0c23590f | 444 | #endif |
d756f4ad | 445 | #ifdef CONFIG_X86_64 |
4d46a89e | 446 | unsigned long fs; |
d756f4ad | 447 | #endif |
4d46a89e | 448 | unsigned long gs; |
24f1e32c FW |
449 | /* Save middle states of ptrace breakpoints */ |
450 | struct perf_event *ptrace_bps[HBP_NUM]; | |
451 | /* Debug status used for traps, single steps, etc... */ | |
452 | unsigned long debugreg6; | |
4d46a89e IM |
453 | /* Fault info: */ |
454 | unsigned long cr2; | |
455 | unsigned long trap_no; | |
456 | unsigned long error_code; | |
61c4628b SS |
457 | /* floating point and extended processor state */ |
458 | union thread_xstate *xstate; | |
cb38d377 | 459 | #ifdef CONFIG_X86_32 |
4d46a89e | 460 | /* Virtual 86 mode info */ |
cb38d377 GOC |
461 | struct vm86_struct __user *vm86_info; |
462 | unsigned long screen_bitmap; | |
4d46a89e IM |
463 | unsigned long v86flags; |
464 | unsigned long v86mask; | |
465 | unsigned long saved_sp0; | |
466 | unsigned int saved_fs; | |
467 | unsigned int saved_gs; | |
cb38d377 | 468 | #endif |
4d46a89e IM |
469 | /* IO permissions: */ |
470 | unsigned long *io_bitmap_ptr; | |
471 | unsigned long iopl; | |
472 | /* Max allowed port in the bitmap, in bytes: */ | |
473 | unsigned io_bitmap_max; | |
cb38d377 GOC |
474 | /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */ |
475 | unsigned long debugctlmsr; | |
2311f0de | 476 | /* Debug Store context; see asm/ds.h */ |
93fa7636 | 477 | struct ds_context *ds_ctx; |
cb38d377 GOC |
478 | }; |
479 | ||
1b46cbe0 GOC |
480 | static inline unsigned long native_get_debugreg(int regno) |
481 | { | |
4d46a89e | 482 | unsigned long val = 0; /* Damn you, gcc! */ |
1b46cbe0 GOC |
483 | |
484 | switch (regno) { | |
485 | case 0: | |
cca2e6f8 JP |
486 | asm("mov %%db0, %0" :"=r" (val)); |
487 | break; | |
1b46cbe0 | 488 | case 1: |
cca2e6f8 JP |
489 | asm("mov %%db1, %0" :"=r" (val)); |
490 | break; | |
1b46cbe0 | 491 | case 2: |
cca2e6f8 JP |
492 | asm("mov %%db2, %0" :"=r" (val)); |
493 | break; | |
1b46cbe0 | 494 | case 3: |
cca2e6f8 JP |
495 | asm("mov %%db3, %0" :"=r" (val)); |
496 | break; | |
1b46cbe0 | 497 | case 6: |
cca2e6f8 JP |
498 | asm("mov %%db6, %0" :"=r" (val)); |
499 | break; | |
1b46cbe0 | 500 | case 7: |
cca2e6f8 JP |
501 | asm("mov %%db7, %0" :"=r" (val)); |
502 | break; | |
1b46cbe0 GOC |
503 | default: |
504 | BUG(); | |
505 | } | |
506 | return val; | |
507 | } | |
508 | ||
509 | static inline void native_set_debugreg(int regno, unsigned long value) | |
510 | { | |
511 | switch (regno) { | |
512 | case 0: | |
4d46a89e | 513 | asm("mov %0, %%db0" ::"r" (value)); |
1b46cbe0 GOC |
514 | break; |
515 | case 1: | |
4d46a89e | 516 | asm("mov %0, %%db1" ::"r" (value)); |
1b46cbe0 GOC |
517 | break; |
518 | case 2: | |
4d46a89e | 519 | asm("mov %0, %%db2" ::"r" (value)); |
1b46cbe0 GOC |
520 | break; |
521 | case 3: | |
4d46a89e | 522 | asm("mov %0, %%db3" ::"r" (value)); |
1b46cbe0 GOC |
523 | break; |
524 | case 6: | |
4d46a89e | 525 | asm("mov %0, %%db6" ::"r" (value)); |
1b46cbe0 GOC |
526 | break; |
527 | case 7: | |
4d46a89e | 528 | asm("mov %0, %%db7" ::"r" (value)); |
1b46cbe0 GOC |
529 | break; |
530 | default: | |
531 | BUG(); | |
532 | } | |
533 | } | |
534 | ||
62d7d7ed GOC |
535 | /* |
536 | * Set IOPL bits in EFLAGS from given mask | |
537 | */ | |
538 | static inline void native_set_iopl_mask(unsigned mask) | |
539 | { | |
540 | #ifdef CONFIG_X86_32 | |
541 | unsigned int reg; | |
4d46a89e | 542 | |
cca2e6f8 JP |
543 | asm volatile ("pushfl;" |
544 | "popl %0;" | |
545 | "andl %1, %0;" | |
546 | "orl %2, %0;" | |
547 | "pushl %0;" | |
548 | "popfl" | |
549 | : "=&r" (reg) | |
550 | : "i" (~X86_EFLAGS_IOPL), "r" (mask)); | |
62d7d7ed GOC |
551 | #endif |
552 | } | |
553 | ||
4d46a89e IM |
554 | static inline void |
555 | native_load_sp0(struct tss_struct *tss, struct thread_struct *thread) | |
7818a1e0 GOC |
556 | { |
557 | tss->x86_tss.sp0 = thread->sp0; | |
558 | #ifdef CONFIG_X86_32 | |
4d46a89e | 559 | /* Only happens when SEP is enabled, no need to test "SEP"arately: */ |
7818a1e0 GOC |
560 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
561 | tss->x86_tss.ss1 = thread->sysenter_cs; | |
562 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); | |
563 | } | |
564 | #endif | |
565 | } | |
1b46cbe0 | 566 | |
e801f864 GOC |
567 | static inline void native_swapgs(void) |
568 | { | |
569 | #ifdef CONFIG_X86_64 | |
570 | asm volatile("swapgs" ::: "memory"); | |
571 | #endif | |
572 | } | |
573 | ||
7818a1e0 GOC |
574 | #ifdef CONFIG_PARAVIRT |
575 | #include <asm/paravirt.h> | |
576 | #else | |
4d46a89e IM |
577 | #define __cpuid native_cpuid |
578 | #define paravirt_enabled() 0 | |
1b46cbe0 GOC |
579 | |
580 | /* | |
581 | * These special macros can be used to get or set a debugging register | |
582 | */ | |
583 | #define get_debugreg(var, register) \ | |
584 | (var) = native_get_debugreg(register) | |
585 | #define set_debugreg(value, register) \ | |
586 | native_set_debugreg(register, value) | |
587 | ||
cca2e6f8 JP |
588 | static inline void load_sp0(struct tss_struct *tss, |
589 | struct thread_struct *thread) | |
7818a1e0 GOC |
590 | { |
591 | native_load_sp0(tss, thread); | |
592 | } | |
593 | ||
62d7d7ed | 594 | #define set_iopl_mask native_set_iopl_mask |
1b46cbe0 GOC |
595 | #endif /* CONFIG_PARAVIRT */ |
596 | ||
597 | /* | |
598 | * Save the cr4 feature set we're using (ie | |
599 | * Pentium 4MB enable and PPro Global page | |
600 | * enable), so that any CPU's that boot up | |
601 | * after us can get the correct flags. | |
602 | */ | |
4d46a89e | 603 | extern unsigned long mmu_cr4_features; |
1b46cbe0 GOC |
604 | |
605 | static inline void set_in_cr4(unsigned long mask) | |
606 | { | |
607 | unsigned cr4; | |
4d46a89e | 608 | |
1b46cbe0 GOC |
609 | mmu_cr4_features |= mask; |
610 | cr4 = read_cr4(); | |
611 | cr4 |= mask; | |
612 | write_cr4(cr4); | |
613 | } | |
614 | ||
615 | static inline void clear_in_cr4(unsigned long mask) | |
616 | { | |
617 | unsigned cr4; | |
4d46a89e | 618 | |
1b46cbe0 GOC |
619 | mmu_cr4_features &= ~mask; |
620 | cr4 = read_cr4(); | |
621 | cr4 &= ~mask; | |
622 | write_cr4(cr4); | |
623 | } | |
624 | ||
fc87e906 | 625 | typedef struct { |
4d46a89e | 626 | unsigned long seg; |
fc87e906 GOC |
627 | } mm_segment_t; |
628 | ||
629 | ||
683e0253 GOC |
630 | /* |
631 | * create a kernel thread without removing it from tasklists | |
632 | */ | |
633 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); | |
634 | ||
635 | /* Free all resources held by a thread. */ | |
636 | extern void release_thread(struct task_struct *); | |
637 | ||
4d46a89e | 638 | /* Prepare to copy thread state - unlazy all lazy state */ |
683e0253 | 639 | extern void prepare_to_copy(struct task_struct *tsk); |
1b46cbe0 | 640 | |
683e0253 | 641 | unsigned long get_wchan(struct task_struct *p); |
c758ecf6 GOC |
642 | |
643 | /* | |
644 | * Generic CPUID function | |
645 | * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx | |
646 | * resulting in stale register contents being returned. | |
647 | */ | |
648 | static inline void cpuid(unsigned int op, | |
649 | unsigned int *eax, unsigned int *ebx, | |
650 | unsigned int *ecx, unsigned int *edx) | |
651 | { | |
652 | *eax = op; | |
653 | *ecx = 0; | |
654 | __cpuid(eax, ebx, ecx, edx); | |
655 | } | |
656 | ||
657 | /* Some CPUID calls want 'count' to be placed in ecx */ | |
658 | static inline void cpuid_count(unsigned int op, int count, | |
659 | unsigned int *eax, unsigned int *ebx, | |
660 | unsigned int *ecx, unsigned int *edx) | |
661 | { | |
662 | *eax = op; | |
663 | *ecx = count; | |
664 | __cpuid(eax, ebx, ecx, edx); | |
665 | } | |
666 | ||
667 | /* | |
668 | * CPUID functions returning a single datum | |
669 | */ | |
670 | static inline unsigned int cpuid_eax(unsigned int op) | |
671 | { | |
672 | unsigned int eax, ebx, ecx, edx; | |
673 | ||
674 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 675 | |
c758ecf6 GOC |
676 | return eax; |
677 | } | |
4d46a89e | 678 | |
c758ecf6 GOC |
679 | static inline unsigned int cpuid_ebx(unsigned int op) |
680 | { | |
681 | unsigned int eax, ebx, ecx, edx; | |
682 | ||
683 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 684 | |
c758ecf6 GOC |
685 | return ebx; |
686 | } | |
4d46a89e | 687 | |
c758ecf6 GOC |
688 | static inline unsigned int cpuid_ecx(unsigned int op) |
689 | { | |
690 | unsigned int eax, ebx, ecx, edx; | |
691 | ||
692 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 693 | |
c758ecf6 GOC |
694 | return ecx; |
695 | } | |
4d46a89e | 696 | |
c758ecf6 GOC |
697 | static inline unsigned int cpuid_edx(unsigned int op) |
698 | { | |
699 | unsigned int eax, ebx, ecx, edx; | |
700 | ||
701 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 702 | |
c758ecf6 GOC |
703 | return edx; |
704 | } | |
705 | ||
683e0253 GOC |
706 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
707 | static inline void rep_nop(void) | |
708 | { | |
cca2e6f8 | 709 | asm volatile("rep; nop" ::: "memory"); |
683e0253 GOC |
710 | } |
711 | ||
4d46a89e IM |
712 | static inline void cpu_relax(void) |
713 | { | |
714 | rep_nop(); | |
715 | } | |
716 | ||
5367b688 | 717 | /* Stop speculative execution and prefetching of modified code. */ |
683e0253 GOC |
718 | static inline void sync_core(void) |
719 | { | |
720 | int tmp; | |
4d46a89e | 721 | |
5367b688 BH |
722 | #if defined(CONFIG_M386) || defined(CONFIG_M486) |
723 | if (boot_cpu_data.x86 < 5) | |
724 | /* There is no speculative execution. | |
725 | * jmp is a barrier to prefetching. */ | |
726 | asm volatile("jmp 1f\n1:\n" ::: "memory"); | |
727 | else | |
728 | #endif | |
729 | /* cpuid is a barrier to speculative execution. | |
730 | * Prefetched instructions are automatically | |
731 | * invalidated when modified. */ | |
732 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) | |
733 | : "ebx", "ecx", "edx", "memory"); | |
683e0253 GOC |
734 | } |
735 | ||
cca2e6f8 JP |
736 | static inline void __monitor(const void *eax, unsigned long ecx, |
737 | unsigned long edx) | |
683e0253 | 738 | { |
4d46a89e | 739 | /* "monitor %eax, %ecx, %edx;" */ |
cca2e6f8 JP |
740 | asm volatile(".byte 0x0f, 0x01, 0xc8;" |
741 | :: "a" (eax), "c" (ecx), "d"(edx)); | |
683e0253 GOC |
742 | } |
743 | ||
744 | static inline void __mwait(unsigned long eax, unsigned long ecx) | |
745 | { | |
4d46a89e | 746 | /* "mwait %eax, %ecx;" */ |
cca2e6f8 JP |
747 | asm volatile(".byte 0x0f, 0x01, 0xc9;" |
748 | :: "a" (eax), "c" (ecx)); | |
683e0253 GOC |
749 | } |
750 | ||
751 | static inline void __sti_mwait(unsigned long eax, unsigned long ecx) | |
752 | { | |
7f424a8b | 753 | trace_hardirqs_on(); |
4d46a89e | 754 | /* "mwait %eax, %ecx;" */ |
cca2e6f8 JP |
755 | asm volatile("sti; .byte 0x0f, 0x01, 0xc9;" |
756 | :: "a" (eax), "c" (ecx)); | |
683e0253 GOC |
757 | } |
758 | ||
759 | extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); | |
760 | ||
683e0253 | 761 | extern void select_idle_routine(const struct cpuinfo_x86 *c); |
30e1e6d1 | 762 | extern void init_c1e_mask(void); |
683e0253 | 763 | |
4d46a89e | 764 | extern unsigned long boot_option_idle_override; |
c1e3b377 | 765 | extern unsigned long idle_halt; |
da5e09a1 | 766 | extern unsigned long idle_nomwait; |
683e0253 | 767 | |
394a1505 ML |
768 | /* |
769 | * on systems with caches, caches must be flashed as the absolute | |
770 | * last instruction before going into a suspended halt. Otherwise, | |
771 | * dirty data can linger in the cache and become stale on resume, | |
772 | * leading to strange errors. | |
773 | * | |
774 | * perform a variety of operations to guarantee that the compiler | |
775 | * will not reorder instructions. wbinvd itself is serializing | |
776 | * so the processor will not reorder. | |
777 | * | |
778 | * Systems without cache can just go into halt. | |
779 | */ | |
780 | static inline void wbinvd_halt(void) | |
781 | { | |
782 | mb(); | |
783 | /* check for clflush to determine if wbinvd is legal */ | |
784 | if (cpu_has_clflush) | |
785 | asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory"); | |
786 | else | |
787 | while (1) | |
788 | halt(); | |
789 | } | |
790 | ||
1a53905a GOC |
791 | extern void enable_sep_cpu(void); |
792 | extern int sysenter_setup(void); | |
793 | ||
794 | /* Defined in head.S */ | |
4d46a89e | 795 | extern struct desc_ptr early_gdt_descr; |
1a53905a GOC |
796 | |
797 | extern void cpu_set_gdt(int); | |
552be871 | 798 | extern void switch_to_new_gdt(int); |
11e3a840 | 799 | extern void load_percpu_segment(int); |
1a53905a | 800 | extern void cpu_init(void); |
1a53905a | 801 | |
c2724775 MM |
802 | static inline unsigned long get_debugctlmsr(void) |
803 | { | |
804 | unsigned long debugctlmsr = 0; | |
805 | ||
806 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
807 | if (boot_cpu_data.x86 < 6) | |
808 | return 0; | |
809 | #endif | |
810 | rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); | |
811 | ||
812 | return debugctlmsr; | |
813 | } | |
814 | ||
35bb7600 MM |
815 | static inline unsigned long get_debugctlmsr_on_cpu(int cpu) |
816 | { | |
817 | u64 debugctlmsr = 0; | |
818 | u32 val1, val2; | |
819 | ||
820 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
821 | if (boot_cpu_data.x86 < 6) | |
822 | return 0; | |
823 | #endif | |
824 | rdmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR, &val1, &val2); | |
825 | debugctlmsr = val1 | ((u64)val2 << 32); | |
826 | ||
827 | return debugctlmsr; | |
828 | } | |
829 | ||
5b0e5084 JB |
830 | static inline void update_debugctlmsr(unsigned long debugctlmsr) |
831 | { | |
832 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
833 | if (boot_cpu_data.x86 < 6) | |
834 | return; | |
835 | #endif | |
836 | wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); | |
837 | } | |
838 | ||
35bb7600 MM |
839 | static inline void update_debugctlmsr_on_cpu(int cpu, |
840 | unsigned long debugctlmsr) | |
841 | { | |
842 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
843 | if (boot_cpu_data.x86 < 6) | |
844 | return; | |
845 | #endif | |
846 | wrmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR, | |
847 | (u32)((u64)debugctlmsr), | |
848 | (u32)((u64)debugctlmsr >> 32)); | |
849 | } | |
850 | ||
4d46a89e IM |
851 | /* |
852 | * from system description table in BIOS. Mostly for MCA use, but | |
853 | * others may find it useful: | |
854 | */ | |
855 | extern unsigned int machine_id; | |
856 | extern unsigned int machine_submodel_id; | |
857 | extern unsigned int BIOS_revision; | |
1a53905a | 858 | |
4d46a89e IM |
859 | /* Boot loader type from the setup header: */ |
860 | extern int bootloader_type; | |
5031296c | 861 | extern int bootloader_version; |
1a53905a | 862 | |
4d46a89e | 863 | extern char ignore_fpu_irq; |
683e0253 GOC |
864 | |
865 | #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 | |
866 | #define ARCH_HAS_PREFETCHW | |
867 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
868 | ||
ae2e15eb | 869 | #ifdef CONFIG_X86_32 |
4d46a89e IM |
870 | # define BASE_PREFETCH ASM_NOP4 |
871 | # define ARCH_HAS_PREFETCH | |
ae2e15eb | 872 | #else |
4d46a89e | 873 | # define BASE_PREFETCH "prefetcht0 (%1)" |
ae2e15eb GOC |
874 | #endif |
875 | ||
4d46a89e IM |
876 | /* |
877 | * Prefetch instructions for Pentium III (+) and AMD Athlon (+) | |
878 | * | |
879 | * It's not worth to care about 3dnow prefetches for the K6 | |
880 | * because they are microcoded there and very slow. | |
881 | */ | |
ae2e15eb GOC |
882 | static inline void prefetch(const void *x) |
883 | { | |
884 | alternative_input(BASE_PREFETCH, | |
885 | "prefetchnta (%1)", | |
886 | X86_FEATURE_XMM, | |
887 | "r" (x)); | |
888 | } | |
889 | ||
4d46a89e IM |
890 | /* |
891 | * 3dnow prefetch to get an exclusive cache line. | |
892 | * Useful for spinlocks to avoid one state transition in the | |
893 | * cache coherency protocol: | |
894 | */ | |
ae2e15eb GOC |
895 | static inline void prefetchw(const void *x) |
896 | { | |
897 | alternative_input(BASE_PREFETCH, | |
898 | "prefetchw (%1)", | |
899 | X86_FEATURE_3DNOW, | |
900 | "r" (x)); | |
901 | } | |
902 | ||
4d46a89e IM |
903 | static inline void spin_lock_prefetch(const void *x) |
904 | { | |
905 | prefetchw(x); | |
906 | } | |
907 | ||
2f66dcc9 GOC |
908 | #ifdef CONFIG_X86_32 |
909 | /* | |
910 | * User space process size: 3GB (default). | |
911 | */ | |
4d46a89e | 912 | #define TASK_SIZE PAGE_OFFSET |
d9517346 | 913 | #define TASK_SIZE_MAX TASK_SIZE |
4d46a89e IM |
914 | #define STACK_TOP TASK_SIZE |
915 | #define STACK_TOP_MAX STACK_TOP | |
916 | ||
917 | #define INIT_THREAD { \ | |
918 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ | |
919 | .vm86_info = NULL, \ | |
920 | .sysenter_cs = __KERNEL_CS, \ | |
921 | .io_bitmap_ptr = NULL, \ | |
2f66dcc9 GOC |
922 | } |
923 | ||
924 | /* | |
925 | * Note that the .io_bitmap member must be extra-big. This is because | |
926 | * the CPU will access an additional byte beyond the end of the IO | |
927 | * permission bitmap. The extra byte must be all 1 bits, and must | |
928 | * be within the limit. | |
929 | */ | |
4d46a89e IM |
930 | #define INIT_TSS { \ |
931 | .x86_tss = { \ | |
2f66dcc9 | 932 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
4d46a89e IM |
933 | .ss0 = __KERNEL_DS, \ |
934 | .ss1 = __KERNEL_CS, \ | |
935 | .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ | |
936 | }, \ | |
937 | .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ | |
2f66dcc9 GOC |
938 | } |
939 | ||
2f66dcc9 GOC |
940 | extern unsigned long thread_saved_pc(struct task_struct *tsk); |
941 | ||
942 | #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) | |
943 | #define KSTK_TOP(info) \ | |
944 | ({ \ | |
945 | unsigned long *__ptr = (unsigned long *)(info); \ | |
946 | (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ | |
947 | }) | |
948 | ||
949 | /* | |
950 | * The below -8 is to reserve 8 bytes on top of the ring0 stack. | |
951 | * This is necessary to guarantee that the entire "struct pt_regs" | |
952 | * is accessable even if the CPU haven't stored the SS/ESP registers | |
953 | * on the stack (interrupt gate does not save these registers | |
954 | * when switching to the same priv ring). | |
955 | * Therefore beware: accessing the ss/esp fields of the | |
956 | * "struct pt_regs" is possible, but they may contain the | |
957 | * completely wrong values. | |
958 | */ | |
959 | #define task_pt_regs(task) \ | |
960 | ({ \ | |
961 | struct pt_regs *__regs__; \ | |
962 | __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ | |
963 | __regs__ - 1; \ | |
964 | }) | |
965 | ||
4d46a89e | 966 | #define KSTK_ESP(task) (task_pt_regs(task)->sp) |
2f66dcc9 GOC |
967 | |
968 | #else | |
969 | /* | |
970 | * User space process size. 47bits minus one guard page. | |
971 | */ | |
d9517346 | 972 | #define TASK_SIZE_MAX ((1UL << 47) - PAGE_SIZE) |
2f66dcc9 GOC |
973 | |
974 | /* This decides where the kernel will search for a free chunk of vm | |
975 | * space during mmap's. | |
976 | */ | |
4d46a89e IM |
977 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ |
978 | 0xc0000000 : 0xFFFFe000) | |
2f66dcc9 | 979 | |
4d46a89e | 980 | #define TASK_SIZE (test_thread_flag(TIF_IA32) ? \ |
d9517346 | 981 | IA32_PAGE_OFFSET : TASK_SIZE_MAX) |
4d46a89e | 982 | #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \ |
d9517346 | 983 | IA32_PAGE_OFFSET : TASK_SIZE_MAX) |
2f66dcc9 | 984 | |
922a70d3 | 985 | #define STACK_TOP TASK_SIZE |
d9517346 | 986 | #define STACK_TOP_MAX TASK_SIZE_MAX |
922a70d3 | 987 | |
2f66dcc9 GOC |
988 | #define INIT_THREAD { \ |
989 | .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ | |
990 | } | |
991 | ||
992 | #define INIT_TSS { \ | |
993 | .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ | |
994 | } | |
995 | ||
2f66dcc9 GOC |
996 | /* |
997 | * Return saved PC of a blocked thread. | |
998 | * What is this good for? it will be always the scheduler or ret_from_fork. | |
999 | */ | |
4d46a89e | 1000 | #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8)) |
2f66dcc9 | 1001 | |
4d46a89e IM |
1002 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
1003 | #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ | |
2f66dcc9 GOC |
1004 | #endif /* CONFIG_X86_64 */ |
1005 | ||
513ad84b IM |
1006 | extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
1007 | unsigned long new_sp); | |
1008 | ||
4d46a89e IM |
1009 | /* |
1010 | * This decides where the kernel will search for a free chunk of vm | |
683e0253 GOC |
1011 | * space during mmap's. |
1012 | */ | |
1013 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) | |
1014 | ||
4d46a89e | 1015 | #define KSTK_EIP(task) (task_pt_regs(task)->ip) |
683e0253 | 1016 | |
529e25f6 EB |
1017 | /* Get/set a process' ability to use the timestamp counter instruction */ |
1018 | #define GET_TSC_CTL(adr) get_tsc_mode((adr)) | |
1019 | #define SET_TSC_CTL(val) set_tsc_mode((val)) | |
1020 | ||
1021 | extern int get_tsc_mode(unsigned long adr); | |
1022 | extern int set_tsc_mode(unsigned int val); | |
1023 | ||
6a812691 AH |
1024 | extern int amd_get_nb_id(int cpu); |
1025 | ||
5cbc19a9 PZ |
1026 | struct aperfmperf { |
1027 | u64 aperf, mperf; | |
1028 | }; | |
1029 | ||
1030 | static inline void get_aperfmperf(struct aperfmperf *am) | |
1031 | { | |
1032 | WARN_ON_ONCE(!boot_cpu_has(X86_FEATURE_APERFMPERF)); | |
1033 | ||
1034 | rdmsrl(MSR_IA32_APERF, am->aperf); | |
1035 | rdmsrl(MSR_IA32_MPERF, am->mperf); | |
1036 | } | |
1037 | ||
1038 | #define APERFMPERF_SHIFT 10 | |
1039 | ||
1040 | static inline | |
1041 | unsigned long calc_aperfmperf_ratio(struct aperfmperf *old, | |
1042 | struct aperfmperf *new) | |
1043 | { | |
1044 | u64 aperf = new->aperf - old->aperf; | |
1045 | u64 mperf = new->mperf - old->mperf; | |
1046 | unsigned long ratio = aperf; | |
1047 | ||
1048 | mperf >>= APERFMPERF_SHIFT; | |
1049 | if (mperf) | |
1050 | ratio = div64_u64(aperf, mperf); | |
1051 | ||
1052 | return ratio; | |
1053 | } | |
1054 | ||
1965aae3 | 1055 | #endif /* _ASM_X86_PROCESSOR_H */ |