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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> | |
2f66dcc9 | 17 | #include <asm/page.h> |
54321d94 | 18 | #include <asm/pgtable_types.h> |
5300db88 | 19 | #include <asm/percpu.h> |
2f66dcc9 GOC |
20 | #include <asm/msr.h> |
21 | #include <asm/desc_defs.h> | |
bd61643e | 22 | #include <asm/nops.h> |
f05e798a | 23 | #include <asm/special_insns.h> |
4d46a89e | 24 | |
2f66dcc9 | 25 | #include <linux/personality.h> |
5300db88 GOC |
26 | #include <linux/cpumask.h> |
27 | #include <linux/cache.h> | |
2f66dcc9 | 28 | #include <linux/threads.h> |
5cbc19a9 | 29 | #include <linux/math64.h> |
faa4602e | 30 | #include <linux/err.h> |
f05e798a DH |
31 | #include <linux/irqflags.h> |
32 | ||
33 | /* | |
34 | * We handle most unaligned accesses in hardware. On the other hand | |
35 | * unaligned DMA can be quite expensive on some Nehalem processors. | |
36 | * | |
37 | * Based on this we disable the IP header alignment in network drivers. | |
38 | */ | |
39 | #define NET_IP_ALIGN 0 | |
c72dcf83 | 40 | |
b332828c | 41 | #define HBP_NUM 4 |
0ccb8acc GOC |
42 | /* |
43 | * Default implementation of macro that returns current | |
44 | * instruction pointer ("program counter"). | |
45 | */ | |
46 | static inline void *current_text_addr(void) | |
47 | { | |
48 | void *pc; | |
4d46a89e IM |
49 | |
50 | asm volatile("mov $1f, %0; 1:":"=r" (pc)); | |
51 | ||
0ccb8acc GOC |
52 | return pc; |
53 | } | |
54 | ||
dbcb4660 | 55 | #ifdef CONFIG_X86_VSMP |
4d46a89e IM |
56 | # define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) |
57 | # define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) | |
dbcb4660 | 58 | #else |
4d46a89e IM |
59 | # define ARCH_MIN_TASKALIGN 16 |
60 | # define ARCH_MIN_MMSTRUCT_ALIGN 0 | |
dbcb4660 GOC |
61 | #endif |
62 | ||
e0ba94f1 AS |
63 | enum tlb_infos { |
64 | ENTRIES, | |
65 | NR_INFO | |
66 | }; | |
67 | ||
68 | extern u16 __read_mostly tlb_lli_4k[NR_INFO]; | |
69 | extern u16 __read_mostly tlb_lli_2m[NR_INFO]; | |
70 | extern u16 __read_mostly tlb_lli_4m[NR_INFO]; | |
71 | extern u16 __read_mostly tlb_lld_4k[NR_INFO]; | |
72 | extern u16 __read_mostly tlb_lld_2m[NR_INFO]; | |
73 | extern u16 __read_mostly tlb_lld_4m[NR_INFO]; | |
dd360393 | 74 | extern u16 __read_mostly tlb_lld_1g[NR_INFO]; |
c4211f42 | 75 | |
5300db88 GOC |
76 | /* |
77 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
78 | * Members of this structure are referenced in head.S, so think twice | |
79 | * before touching them. [mj] | |
80 | */ | |
81 | ||
82 | struct cpuinfo_x86 { | |
4d46a89e IM |
83 | __u8 x86; /* CPU family */ |
84 | __u8 x86_vendor; /* CPU vendor */ | |
85 | __u8 x86_model; | |
86 | __u8 x86_mask; | |
5300db88 | 87 | #ifdef CONFIG_X86_32 |
4d46a89e IM |
88 | char wp_works_ok; /* It doesn't on 386's */ |
89 | ||
90 | /* Problems on some 486Dx4's and old 386's: */ | |
4d46a89e | 91 | char rfu; |
4d46a89e | 92 | char pad0; |
60e019eb | 93 | char pad1; |
5300db88 | 94 | #else |
4d46a89e | 95 | /* Number of 4K pages in DTLB/ITLB combined(in pages): */ |
b1882e68 | 96 | int x86_tlbsize; |
13c6c532 | 97 | #endif |
4d46a89e IM |
98 | __u8 x86_virt_bits; |
99 | __u8 x86_phys_bits; | |
100 | /* CPUID returned core id bits: */ | |
101 | __u8 x86_coreid_bits; | |
102 | /* Max extended CPUID function supported: */ | |
103 | __u32 extended_cpuid_level; | |
4d46a89e IM |
104 | /* Maximum supported CPUID level, -1=no CPUID: */ |
105 | int cpuid_level; | |
65fc985b | 106 | __u32 x86_capability[NCAPINTS + NBUGINTS]; |
4d46a89e IM |
107 | char x86_vendor_id[16]; |
108 | char x86_model_id[64]; | |
109 | /* in KB - valid for CPUS which support this call: */ | |
110 | int x86_cache_size; | |
111 | int x86_cache_alignment; /* In bytes */ | |
112 | int x86_power; | |
113 | unsigned long loops_per_jiffy; | |
4d46a89e IM |
114 | /* cpuid returned max cores value: */ |
115 | u16 x86_max_cores; | |
116 | u16 apicid; | |
01aaea1a | 117 | u16 initial_apicid; |
4d46a89e | 118 | u16 x86_clflush_size; |
4d46a89e IM |
119 | /* number of cores as seen by the OS: */ |
120 | u16 booted_cores; | |
121 | /* Physical processor id: */ | |
122 | u16 phys_proc_id; | |
123 | /* Core id: */ | |
124 | u16 cpu_core_id; | |
6057b4d3 AH |
125 | /* Compute unit id */ |
126 | u8 compute_unit_id; | |
4d46a89e IM |
127 | /* Index into per_cpu list: */ |
128 | u16 cpu_index; | |
506ed6b5 | 129 | u32 microcode; |
2c773dd3 | 130 | }; |
5300db88 | 131 | |
4d46a89e IM |
132 | #define X86_VENDOR_INTEL 0 |
133 | #define X86_VENDOR_CYRIX 1 | |
134 | #define X86_VENDOR_AMD 2 | |
135 | #define X86_VENDOR_UMC 3 | |
4d46a89e IM |
136 | #define X86_VENDOR_CENTAUR 5 |
137 | #define X86_VENDOR_TRANSMETA 7 | |
138 | #define X86_VENDOR_NSC 8 | |
139 | #define X86_VENDOR_NUM 9 | |
140 | ||
141 | #define X86_VENDOR_UNKNOWN 0xff | |
5300db88 | 142 | |
1a53905a GOC |
143 | /* |
144 | * capabilities of CPUs | |
145 | */ | |
4d46a89e IM |
146 | extern struct cpuinfo_x86 boot_cpu_data; |
147 | extern struct cpuinfo_x86 new_cpu_data; | |
148 | ||
149 | extern struct tss_struct doublefault_tss; | |
3e0c3737 YL |
150 | extern __u32 cpu_caps_cleared[NCAPINTS]; |
151 | extern __u32 cpu_caps_set[NCAPINTS]; | |
5300db88 GOC |
152 | |
153 | #ifdef CONFIG_SMP | |
2c773dd3 | 154 | DECLARE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info); |
5300db88 | 155 | #define cpu_data(cpu) per_cpu(cpu_info, cpu) |
5300db88 | 156 | #else |
7b543a53 | 157 | #define cpu_info boot_cpu_data |
5300db88 | 158 | #define cpu_data(cpu) boot_cpu_data |
5300db88 GOC |
159 | #endif |
160 | ||
1c6c727d JS |
161 | extern const struct seq_operations cpuinfo_op; |
162 | ||
4d46a89e IM |
163 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) |
164 | ||
165 | extern void cpu_detect(struct cpuinfo_x86 *c); | |
148f9bb8 | 166 | extern void fpu_detect(struct cpuinfo_x86 *c); |
1a53905a | 167 | |
f580366f | 168 | extern void early_cpu_init(void); |
1a53905a GOC |
169 | extern void identify_boot_cpu(void); |
170 | extern void identify_secondary_cpu(struct cpuinfo_x86 *); | |
5300db88 | 171 | extern void print_cpu_info(struct cpuinfo_x86 *); |
21c3fcf3 | 172 | void print_cpu_msr(struct cpuinfo_x86 *); |
5300db88 GOC |
173 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
174 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); | |
04a15418 | 175 | extern void init_amd_cacheinfo(struct cpuinfo_x86 *c); |
5300db88 | 176 | |
bbb65d2d | 177 | extern void detect_extended_topology(struct cpuinfo_x86 *c); |
1a53905a | 178 | extern void detect_ht(struct cpuinfo_x86 *c); |
1a53905a | 179 | |
d288e1cf FY |
180 | #ifdef CONFIG_X86_32 |
181 | extern int have_cpuid_p(void); | |
182 | #else | |
183 | static inline int have_cpuid_p(void) | |
184 | { | |
185 | return 1; | |
186 | } | |
187 | #endif | |
c758ecf6 | 188 | static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
4d46a89e | 189 | unsigned int *ecx, unsigned int *edx) |
c758ecf6 GOC |
190 | { |
191 | /* ecx is often an input as well as an output. */ | |
45a94d7c | 192 | asm volatile("cpuid" |
cca2e6f8 JP |
193 | : "=a" (*eax), |
194 | "=b" (*ebx), | |
195 | "=c" (*ecx), | |
196 | "=d" (*edx) | |
506ed6b5 AK |
197 | : "0" (*eax), "2" (*ecx) |
198 | : "memory"); | |
c758ecf6 GOC |
199 | } |
200 | ||
c72dcf83 GOC |
201 | static inline void load_cr3(pgd_t *pgdir) |
202 | { | |
203 | write_cr3(__pa(pgdir)); | |
204 | } | |
c758ecf6 | 205 | |
ca241c75 GOC |
206 | #ifdef CONFIG_X86_32 |
207 | /* This is the TSS defined by the hardware. */ | |
208 | struct x86_hw_tss { | |
4d46a89e IM |
209 | unsigned short back_link, __blh; |
210 | unsigned long sp0; | |
211 | unsigned short ss0, __ss0h; | |
212 | unsigned long sp1; | |
213 | /* ss1 caches MSR_IA32_SYSENTER_CS: */ | |
214 | unsigned short ss1, __ss1h; | |
215 | unsigned long sp2; | |
216 | unsigned short ss2, __ss2h; | |
217 | unsigned long __cr3; | |
218 | unsigned long ip; | |
219 | unsigned long flags; | |
220 | unsigned long ax; | |
221 | unsigned long cx; | |
222 | unsigned long dx; | |
223 | unsigned long bx; | |
224 | unsigned long sp; | |
225 | unsigned long bp; | |
226 | unsigned long si; | |
227 | unsigned long di; | |
228 | unsigned short es, __esh; | |
229 | unsigned short cs, __csh; | |
230 | unsigned short ss, __ssh; | |
231 | unsigned short ds, __dsh; | |
232 | unsigned short fs, __fsh; | |
233 | unsigned short gs, __gsh; | |
234 | unsigned short ldt, __ldth; | |
235 | unsigned short trace; | |
236 | unsigned short io_bitmap_base; | |
237 | ||
ca241c75 GOC |
238 | } __attribute__((packed)); |
239 | #else | |
240 | struct x86_hw_tss { | |
4d46a89e IM |
241 | u32 reserved1; |
242 | u64 sp0; | |
243 | u64 sp1; | |
244 | u64 sp2; | |
245 | u64 reserved2; | |
246 | u64 ist[7]; | |
247 | u32 reserved3; | |
248 | u32 reserved4; | |
249 | u16 reserved5; | |
250 | u16 io_bitmap_base; | |
251 | ||
ca241c75 GOC |
252 | } __attribute__((packed)) ____cacheline_aligned; |
253 | #endif | |
254 | ||
255 | /* | |
4d46a89e | 256 | * IO-bitmap sizes: |
ca241c75 | 257 | */ |
4d46a89e IM |
258 | #define IO_BITMAP_BITS 65536 |
259 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) | |
260 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) | |
261 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) | |
262 | #define INVALID_IO_BITMAP_OFFSET 0x8000 | |
ca241c75 GOC |
263 | |
264 | struct tss_struct { | |
4d46a89e IM |
265 | /* |
266 | * The hardware state: | |
267 | */ | |
268 | struct x86_hw_tss x86_tss; | |
ca241c75 GOC |
269 | |
270 | /* | |
271 | * The extra 1 is there because the CPU will access an | |
272 | * additional byte beyond the end of the IO permission | |
273 | * bitmap. The extra byte must be all 1 bits, and must | |
274 | * be within the limit. | |
275 | */ | |
4d46a89e | 276 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; |
4d46a89e | 277 | |
ca241c75 | 278 | /* |
4d46a89e | 279 | * .. and then another 0x100 bytes for the emergency kernel stack: |
ca241c75 | 280 | */ |
4d46a89e IM |
281 | unsigned long stack[64]; |
282 | ||
84e65b0a | 283 | } ____cacheline_aligned; |
ca241c75 | 284 | |
24933b82 | 285 | DECLARE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss); |
ca241c75 | 286 | |
a7fcf28d AL |
287 | #ifdef CONFIG_X86_32 |
288 | DECLARE_PER_CPU(unsigned long, cpu_current_top_of_stack); | |
289 | #endif | |
290 | ||
4d46a89e IM |
291 | /* |
292 | * Save the original ist values for checking stack pointers during debugging | |
293 | */ | |
1a53905a | 294 | struct orig_ist { |
4d46a89e | 295 | unsigned long ist[7]; |
1a53905a GOC |
296 | }; |
297 | ||
99f8ecdf | 298 | #define MXCSR_DEFAULT 0x1f80 |
46265df0 | 299 | |
99f8ecdf | 300 | struct i387_fsave_struct { |
ca9cda2f IM |
301 | u32 cwd; /* FPU Control Word */ |
302 | u32 swd; /* FPU Status Word */ | |
303 | u32 twd; /* FPU Tag Word */ | |
304 | u32 fip; /* FPU IP Offset */ | |
305 | u32 fcs; /* FPU IP Selector */ | |
306 | u32 foo; /* FPU Operand Pointer Offset */ | |
307 | u32 fos; /* FPU Operand Pointer Selector */ | |
308 | ||
309 | /* 8*10 bytes for each FP-reg = 80 bytes: */ | |
4d46a89e | 310 | u32 st_space[20]; |
ca9cda2f IM |
311 | |
312 | /* Software status information [not touched by FSAVE ]: */ | |
4d46a89e | 313 | u32 status; |
46265df0 GOC |
314 | }; |
315 | ||
46265df0 | 316 | struct i387_fxsave_struct { |
ca9cda2f IM |
317 | u16 cwd; /* Control Word */ |
318 | u16 swd; /* Status Word */ | |
319 | u16 twd; /* Tag Word */ | |
320 | u16 fop; /* Last Instruction Opcode */ | |
99f8ecdf RM |
321 | union { |
322 | struct { | |
ca9cda2f IM |
323 | u64 rip; /* Instruction Pointer */ |
324 | u64 rdp; /* Data Pointer */ | |
99f8ecdf RM |
325 | }; |
326 | struct { | |
ca9cda2f IM |
327 | u32 fip; /* FPU IP Offset */ |
328 | u32 fcs; /* FPU IP Selector */ | |
329 | u32 foo; /* FPU Operand Offset */ | |
330 | u32 fos; /* FPU Operand Selector */ | |
99f8ecdf RM |
331 | }; |
332 | }; | |
ca9cda2f IM |
333 | u32 mxcsr; /* MXCSR Register State */ |
334 | u32 mxcsr_mask; /* MXCSR Mask */ | |
335 | ||
336 | /* 8*16 bytes for each FP-reg = 128 bytes: */ | |
4d46a89e | 337 | u32 st_space[32]; |
ca9cda2f IM |
338 | |
339 | /* 16*16 bytes for each XMM-reg = 256 bytes: */ | |
4d46a89e | 340 | u32 xmm_space[64]; |
ca9cda2f | 341 | |
bdd8caba SS |
342 | u32 padding[12]; |
343 | ||
344 | union { | |
345 | u32 padding1[12]; | |
346 | u32 sw_reserved[12]; | |
347 | }; | |
4d46a89e | 348 | |
46265df0 GOC |
349 | } __attribute__((aligned(16))); |
350 | ||
99f8ecdf | 351 | struct i387_soft_struct { |
4d46a89e IM |
352 | u32 cwd; |
353 | u32 swd; | |
354 | u32 twd; | |
355 | u32 fip; | |
356 | u32 fcs; | |
357 | u32 foo; | |
358 | u32 fos; | |
359 | /* 8*10 bytes for each FP-reg = 80 bytes: */ | |
360 | u32 st_space[20]; | |
361 | u8 ftop; | |
362 | u8 changed; | |
363 | u8 lookahead; | |
364 | u8 no_update; | |
365 | u8 rm; | |
366 | u8 alimit; | |
ae6af41f | 367 | struct math_emu_info *info; |
4d46a89e | 368 | u32 entry_eip; |
99f8ecdf RM |
369 | }; |
370 | ||
a30469e7 SS |
371 | struct ymmh_struct { |
372 | /* 16 * 16 bytes for each YMMH-reg = 256 bytes */ | |
373 | u32 ymmh_space[64]; | |
374 | }; | |
375 | ||
741e3902 | 376 | /* We don't support LWP yet: */ |
e7d820a5 | 377 | struct lwp_struct { |
741e3902 | 378 | u8 reserved[128]; |
e7d820a5 QR |
379 | }; |
380 | ||
c04e051c DH |
381 | struct bndreg { |
382 | u64 lower_bound; | |
383 | u64 upper_bound; | |
e7d820a5 QR |
384 | } __packed; |
385 | ||
62e7759b DH |
386 | struct bndcsr { |
387 | u64 bndcfgu; | |
388 | u64 bndstatus; | |
e7d820a5 QR |
389 | } __packed; |
390 | ||
dc1e35c6 SS |
391 | struct xsave_hdr_struct { |
392 | u64 xstate_bv; | |
0b29643a FY |
393 | u64 xcomp_bv; |
394 | u64 reserved[6]; | |
dc1e35c6 SS |
395 | } __attribute__((packed)); |
396 | ||
397 | struct xsave_struct { | |
398 | struct i387_fxsave_struct i387; | |
399 | struct xsave_hdr_struct xsave_hdr; | |
a30469e7 | 400 | struct ymmh_struct ymmh; |
e7d820a5 | 401 | struct lwp_struct lwp; |
c04e051c | 402 | struct bndreg bndreg[4]; |
62e7759b | 403 | struct bndcsr bndcsr; |
dc1e35c6 SS |
404 | /* new processor state extensions will go here */ |
405 | } __attribute__ ((packed, aligned (64))); | |
406 | ||
61c4628b | 407 | union thread_xstate { |
99f8ecdf | 408 | struct i387_fsave_struct fsave; |
46265df0 | 409 | struct i387_fxsave_struct fxsave; |
4d46a89e | 410 | struct i387_soft_struct soft; |
b359e8a4 | 411 | struct xsave_struct xsave; |
46265df0 GOC |
412 | }; |
413 | ||
86603283 | 414 | struct fpu { |
7e16838d LT |
415 | unsigned int last_cpu; |
416 | unsigned int has_fpu; | |
86603283 AK |
417 | union thread_xstate *state; |
418 | }; | |
419 | ||
fe676203 | 420 | #ifdef CONFIG_X86_64 |
2f66dcc9 | 421 | DECLARE_PER_CPU(struct orig_ist, orig_ist); |
26f80bd6 | 422 | |
947e76cd BG |
423 | union irq_stack_union { |
424 | char irq_stack[IRQ_STACK_SIZE]; | |
425 | /* | |
426 | * GCC hardcodes the stack canary as %gs:40. Since the | |
427 | * irq_stack is the object at %gs:0, we reserve the bottom | |
428 | * 48 bytes of the irq stack for the canary. | |
429 | */ | |
430 | struct { | |
431 | char gs_base[40]; | |
432 | unsigned long stack_canary; | |
433 | }; | |
434 | }; | |
435 | ||
277d5b40 | 436 | DECLARE_PER_CPU_FIRST(union irq_stack_union, irq_stack_union) __visible; |
2add8e23 BG |
437 | DECLARE_INIT_PER_CPU(irq_stack_union); |
438 | ||
26f80bd6 | 439 | DECLARE_PER_CPU(char *, irq_stack_ptr); |
9766cdbc | 440 | DECLARE_PER_CPU(unsigned int, irq_count); |
9766cdbc | 441 | extern asmlinkage void ignore_sysret(void); |
60a5317f TH |
442 | #else /* X86_64 */ |
443 | #ifdef CONFIG_CC_STACKPROTECTOR | |
1ea0d14e JF |
444 | /* |
445 | * Make sure stack canary segment base is cached-aligned: | |
446 | * "For Intel Atom processors, avoid non zero segment base address | |
447 | * that is not aligned to cache line boundary at all cost." | |
448 | * (Optim Ref Manual Assembly/Compiler Coding Rule 15.) | |
449 | */ | |
450 | struct stack_canary { | |
451 | char __pad[20]; /* canary at %gs:20 */ | |
452 | unsigned long canary; | |
453 | }; | |
53f82452 | 454 | DECLARE_PER_CPU_ALIGNED(struct stack_canary, stack_canary); |
96a388de | 455 | #endif |
198d208d SR |
456 | /* |
457 | * per-CPU IRQ handling stacks | |
458 | */ | |
459 | struct irq_stack { | |
460 | u32 stack[THREAD_SIZE/sizeof(u32)]; | |
461 | } __aligned(THREAD_SIZE); | |
462 | ||
463 | DECLARE_PER_CPU(struct irq_stack *, hardirq_stack); | |
464 | DECLARE_PER_CPU(struct irq_stack *, softirq_stack); | |
60a5317f | 465 | #endif /* X86_64 */ |
c758ecf6 | 466 | |
61c4628b | 467 | extern unsigned int xstate_size; |
aa283f49 SS |
468 | extern void free_thread_xstate(struct task_struct *); |
469 | extern struct kmem_cache *task_xstate_cachep; | |
683e0253 | 470 | |
24f1e32c FW |
471 | struct perf_event; |
472 | ||
cb38d377 | 473 | struct thread_struct { |
4d46a89e IM |
474 | /* Cached TLS descriptors: */ |
475 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; | |
476 | unsigned long sp0; | |
477 | unsigned long sp; | |
cb38d377 | 478 | #ifdef CONFIG_X86_32 |
4d46a89e | 479 | unsigned long sysenter_cs; |
cb38d377 | 480 | #else |
4d46a89e IM |
481 | unsigned long usersp; /* Copy from PDA */ |
482 | unsigned short es; | |
483 | unsigned short ds; | |
484 | unsigned short fsindex; | |
485 | unsigned short gsindex; | |
cb38d377 | 486 | #endif |
0c23590f | 487 | #ifdef CONFIG_X86_32 |
4d46a89e | 488 | unsigned long ip; |
0c23590f | 489 | #endif |
d756f4ad | 490 | #ifdef CONFIG_X86_64 |
4d46a89e | 491 | unsigned long fs; |
d756f4ad | 492 | #endif |
4d46a89e | 493 | unsigned long gs; |
24f1e32c FW |
494 | /* Save middle states of ptrace breakpoints */ |
495 | struct perf_event *ptrace_bps[HBP_NUM]; | |
496 | /* Debug status used for traps, single steps, etc... */ | |
497 | unsigned long debugreg6; | |
326264a0 FW |
498 | /* Keep track of the exact dr7 value set by the user */ |
499 | unsigned long ptrace_dr7; | |
4d46a89e IM |
500 | /* Fault info: */ |
501 | unsigned long cr2; | |
51e7dc70 | 502 | unsigned long trap_nr; |
4d46a89e | 503 | unsigned long error_code; |
61c4628b | 504 | /* floating point and extended processor state */ |
86603283 | 505 | struct fpu fpu; |
cb38d377 | 506 | #ifdef CONFIG_X86_32 |
4d46a89e | 507 | /* Virtual 86 mode info */ |
cb38d377 GOC |
508 | struct vm86_struct __user *vm86_info; |
509 | unsigned long screen_bitmap; | |
4d46a89e IM |
510 | unsigned long v86flags; |
511 | unsigned long v86mask; | |
512 | unsigned long saved_sp0; | |
513 | unsigned int saved_fs; | |
514 | unsigned int saved_gs; | |
cb38d377 | 515 | #endif |
4d46a89e IM |
516 | /* IO permissions: */ |
517 | unsigned long *io_bitmap_ptr; | |
518 | unsigned long iopl; | |
519 | /* Max allowed port in the bitmap, in bytes: */ | |
520 | unsigned io_bitmap_max; | |
c375f15a VG |
521 | /* |
522 | * fpu_counter contains the number of consecutive context switches | |
523 | * that the FPU is used. If this is over a threshold, the lazy fpu | |
524 | * saving becomes unlazy to save the trap. This is an unsigned char | |
525 | * so that after 256 times the counter wraps and the behavior turns | |
526 | * lazy again; this to deal with bursty apps that only use FPU for | |
527 | * a short time | |
528 | */ | |
529 | unsigned char fpu_counter; | |
cb38d377 GOC |
530 | }; |
531 | ||
62d7d7ed GOC |
532 | /* |
533 | * Set IOPL bits in EFLAGS from given mask | |
534 | */ | |
535 | static inline void native_set_iopl_mask(unsigned mask) | |
536 | { | |
537 | #ifdef CONFIG_X86_32 | |
538 | unsigned int reg; | |
4d46a89e | 539 | |
cca2e6f8 JP |
540 | asm volatile ("pushfl;" |
541 | "popl %0;" | |
542 | "andl %1, %0;" | |
543 | "orl %2, %0;" | |
544 | "pushl %0;" | |
545 | "popfl" | |
546 | : "=&r" (reg) | |
547 | : "i" (~X86_EFLAGS_IOPL), "r" (mask)); | |
62d7d7ed GOC |
548 | #endif |
549 | } | |
550 | ||
4d46a89e IM |
551 | static inline void |
552 | native_load_sp0(struct tss_struct *tss, struct thread_struct *thread) | |
7818a1e0 GOC |
553 | { |
554 | tss->x86_tss.sp0 = thread->sp0; | |
555 | #ifdef CONFIG_X86_32 | |
4d46a89e | 556 | /* Only happens when SEP is enabled, no need to test "SEP"arately: */ |
7818a1e0 GOC |
557 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
558 | tss->x86_tss.ss1 = thread->sysenter_cs; | |
559 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); | |
560 | } | |
561 | #endif | |
562 | } | |
1b46cbe0 | 563 | |
e801f864 GOC |
564 | static inline void native_swapgs(void) |
565 | { | |
566 | #ifdef CONFIG_X86_64 | |
567 | asm volatile("swapgs" ::: "memory"); | |
568 | #endif | |
569 | } | |
570 | ||
a7fcf28d | 571 | static inline unsigned long current_top_of_stack(void) |
8ef46a67 | 572 | { |
a7fcf28d | 573 | #ifdef CONFIG_X86_64 |
24933b82 | 574 | return this_cpu_read_stable(cpu_tss.x86_tss.sp0); |
a7fcf28d AL |
575 | #else |
576 | /* sp0 on x86_32 is special in and around vm86 mode. */ | |
577 | return this_cpu_read_stable(cpu_current_top_of_stack); | |
578 | #endif | |
8ef46a67 AL |
579 | } |
580 | ||
7818a1e0 GOC |
581 | #ifdef CONFIG_PARAVIRT |
582 | #include <asm/paravirt.h> | |
583 | #else | |
4d46a89e IM |
584 | #define __cpuid native_cpuid |
585 | #define paravirt_enabled() 0 | |
1b46cbe0 | 586 | |
cca2e6f8 JP |
587 | static inline void load_sp0(struct tss_struct *tss, |
588 | struct thread_struct *thread) | |
7818a1e0 GOC |
589 | { |
590 | native_load_sp0(tss, thread); | |
591 | } | |
592 | ||
62d7d7ed | 593 | #define set_iopl_mask native_set_iopl_mask |
1b46cbe0 GOC |
594 | #endif /* CONFIG_PARAVIRT */ |
595 | ||
fc87e906 | 596 | typedef struct { |
4d46a89e | 597 | unsigned long seg; |
fc87e906 GOC |
598 | } mm_segment_t; |
599 | ||
600 | ||
683e0253 GOC |
601 | /* Free all resources held by a thread. */ |
602 | extern void release_thread(struct task_struct *); | |
603 | ||
683e0253 | 604 | unsigned long get_wchan(struct task_struct *p); |
c758ecf6 GOC |
605 | |
606 | /* | |
607 | * Generic CPUID function | |
608 | * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx | |
609 | * resulting in stale register contents being returned. | |
610 | */ | |
611 | static inline void cpuid(unsigned int op, | |
612 | unsigned int *eax, unsigned int *ebx, | |
613 | unsigned int *ecx, unsigned int *edx) | |
614 | { | |
615 | *eax = op; | |
616 | *ecx = 0; | |
617 | __cpuid(eax, ebx, ecx, edx); | |
618 | } | |
619 | ||
620 | /* Some CPUID calls want 'count' to be placed in ecx */ | |
621 | static inline void cpuid_count(unsigned int op, int count, | |
622 | unsigned int *eax, unsigned int *ebx, | |
623 | unsigned int *ecx, unsigned int *edx) | |
624 | { | |
625 | *eax = op; | |
626 | *ecx = count; | |
627 | __cpuid(eax, ebx, ecx, edx); | |
628 | } | |
629 | ||
630 | /* | |
631 | * CPUID functions returning a single datum | |
632 | */ | |
633 | static inline unsigned int cpuid_eax(unsigned int op) | |
634 | { | |
635 | unsigned int eax, ebx, ecx, edx; | |
636 | ||
637 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 638 | |
c758ecf6 GOC |
639 | return eax; |
640 | } | |
4d46a89e | 641 | |
c758ecf6 GOC |
642 | static inline unsigned int cpuid_ebx(unsigned int op) |
643 | { | |
644 | unsigned int eax, ebx, ecx, edx; | |
645 | ||
646 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 647 | |
c758ecf6 GOC |
648 | return ebx; |
649 | } | |
4d46a89e | 650 | |
c758ecf6 GOC |
651 | static inline unsigned int cpuid_ecx(unsigned int op) |
652 | { | |
653 | unsigned int eax, ebx, ecx, edx; | |
654 | ||
655 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 656 | |
c758ecf6 GOC |
657 | return ecx; |
658 | } | |
4d46a89e | 659 | |
c758ecf6 GOC |
660 | static inline unsigned int cpuid_edx(unsigned int op) |
661 | { | |
662 | unsigned int eax, ebx, ecx, edx; | |
663 | ||
664 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
4d46a89e | 665 | |
c758ecf6 GOC |
666 | return edx; |
667 | } | |
668 | ||
683e0253 GOC |
669 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
670 | static inline void rep_nop(void) | |
671 | { | |
cca2e6f8 | 672 | asm volatile("rep; nop" ::: "memory"); |
683e0253 GOC |
673 | } |
674 | ||
4d46a89e IM |
675 | static inline void cpu_relax(void) |
676 | { | |
677 | rep_nop(); | |
678 | } | |
679 | ||
3a6bfbc9 DB |
680 | #define cpu_relax_lowlatency() cpu_relax() |
681 | ||
5367b688 | 682 | /* Stop speculative execution and prefetching of modified code. */ |
683e0253 GOC |
683 | static inline void sync_core(void) |
684 | { | |
685 | int tmp; | |
4d46a89e | 686 | |
eb068e78 | 687 | #ifdef CONFIG_M486 |
45c39fb0 PA |
688 | /* |
689 | * Do a CPUID if available, otherwise do a jump. The jump | |
690 | * can conveniently enough be the jump around CPUID. | |
691 | */ | |
692 | asm volatile("cmpl %2,%1\n\t" | |
693 | "jl 1f\n\t" | |
694 | "cpuid\n" | |
695 | "1:" | |
696 | : "=a" (tmp) | |
697 | : "rm" (boot_cpu_data.cpuid_level), "ri" (0), "0" (1) | |
698 | : "ebx", "ecx", "edx", "memory"); | |
699 | #else | |
700 | /* | |
701 | * CPUID is a barrier to speculative execution. | |
702 | * Prefetched instructions are automatically | |
703 | * invalidated when modified. | |
704 | */ | |
705 | asm volatile("cpuid" | |
706 | : "=a" (tmp) | |
707 | : "0" (1) | |
708 | : "ebx", "ecx", "edx", "memory"); | |
5367b688 | 709 | #endif |
683e0253 GOC |
710 | } |
711 | ||
683e0253 | 712 | extern void select_idle_routine(const struct cpuinfo_x86 *c); |
02c68a02 | 713 | extern void init_amd_e400_c1e_mask(void); |
683e0253 | 714 | |
4d46a89e | 715 | extern unsigned long boot_option_idle_override; |
02c68a02 | 716 | extern bool amd_e400_c1e_detected; |
683e0253 | 717 | |
d1896049 | 718 | enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_NOMWAIT, |
69fb3676 | 719 | IDLE_POLL}; |
d1896049 | 720 | |
1a53905a GOC |
721 | extern void enable_sep_cpu(void); |
722 | extern int sysenter_setup(void); | |
723 | ||
29c84391 | 724 | extern void early_trap_init(void); |
8170e6be | 725 | void early_trap_pf_init(void); |
29c84391 | 726 | |
1a53905a | 727 | /* Defined in head.S */ |
4d46a89e | 728 | extern struct desc_ptr early_gdt_descr; |
1a53905a GOC |
729 | |
730 | extern void cpu_set_gdt(int); | |
552be871 | 731 | extern void switch_to_new_gdt(int); |
11e3a840 | 732 | extern void load_percpu_segment(int); |
1a53905a | 733 | extern void cpu_init(void); |
1a53905a | 734 | |
c2724775 MM |
735 | static inline unsigned long get_debugctlmsr(void) |
736 | { | |
ea8e61b7 | 737 | unsigned long debugctlmsr = 0; |
c2724775 MM |
738 | |
739 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
740 | if (boot_cpu_data.x86 < 6) | |
741 | return 0; | |
742 | #endif | |
743 | rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); | |
744 | ||
ea8e61b7 | 745 | return debugctlmsr; |
c2724775 MM |
746 | } |
747 | ||
5b0e5084 JB |
748 | static inline void update_debugctlmsr(unsigned long debugctlmsr) |
749 | { | |
750 | #ifndef CONFIG_X86_DEBUGCTLMSR | |
751 | if (boot_cpu_data.x86 < 6) | |
752 | return; | |
753 | #endif | |
754 | wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); | |
755 | } | |
756 | ||
9bd1190a ON |
757 | extern void set_task_blockstep(struct task_struct *task, bool on); |
758 | ||
4d46a89e IM |
759 | /* |
760 | * from system description table in BIOS. Mostly for MCA use, but | |
761 | * others may find it useful: | |
762 | */ | |
763 | extern unsigned int machine_id; | |
764 | extern unsigned int machine_submodel_id; | |
765 | extern unsigned int BIOS_revision; | |
1a53905a | 766 | |
4d46a89e IM |
767 | /* Boot loader type from the setup header: */ |
768 | extern int bootloader_type; | |
5031296c | 769 | extern int bootloader_version; |
1a53905a | 770 | |
4d46a89e | 771 | extern char ignore_fpu_irq; |
683e0253 GOC |
772 | |
773 | #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 | |
774 | #define ARCH_HAS_PREFETCHW | |
775 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
776 | ||
ae2e15eb | 777 | #ifdef CONFIG_X86_32 |
a930dc45 | 778 | # define BASE_PREFETCH "" |
4d46a89e | 779 | # define ARCH_HAS_PREFETCH |
ae2e15eb | 780 | #else |
a930dc45 | 781 | # define BASE_PREFETCH "prefetcht0 %P1" |
ae2e15eb GOC |
782 | #endif |
783 | ||
4d46a89e IM |
784 | /* |
785 | * Prefetch instructions for Pentium III (+) and AMD Athlon (+) | |
786 | * | |
787 | * It's not worth to care about 3dnow prefetches for the K6 | |
788 | * because they are microcoded there and very slow. | |
789 | */ | |
ae2e15eb GOC |
790 | static inline void prefetch(const void *x) |
791 | { | |
a930dc45 | 792 | alternative_input(BASE_PREFETCH, "prefetchnta %P1", |
ae2e15eb | 793 | X86_FEATURE_XMM, |
a930dc45 | 794 | "m" (*(const char *)x)); |
ae2e15eb GOC |
795 | } |
796 | ||
4d46a89e IM |
797 | /* |
798 | * 3dnow prefetch to get an exclusive cache line. | |
799 | * Useful for spinlocks to avoid one state transition in the | |
800 | * cache coherency protocol: | |
801 | */ | |
ae2e15eb GOC |
802 | static inline void prefetchw(const void *x) |
803 | { | |
a930dc45 BP |
804 | alternative_input(BASE_PREFETCH, "prefetchw %P1", |
805 | X86_FEATURE_3DNOWPREFETCH, | |
806 | "m" (*(const char *)x)); | |
ae2e15eb GOC |
807 | } |
808 | ||
4d46a89e IM |
809 | static inline void spin_lock_prefetch(const void *x) |
810 | { | |
811 | prefetchw(x); | |
812 | } | |
813 | ||
2f66dcc9 GOC |
814 | #ifdef CONFIG_X86_32 |
815 | /* | |
816 | * User space process size: 3GB (default). | |
817 | */ | |
4d46a89e | 818 | #define TASK_SIZE PAGE_OFFSET |
d9517346 | 819 | #define TASK_SIZE_MAX TASK_SIZE |
4d46a89e IM |
820 | #define STACK_TOP TASK_SIZE |
821 | #define STACK_TOP_MAX STACK_TOP | |
822 | ||
823 | #define INIT_THREAD { \ | |
824 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ | |
825 | .vm86_info = NULL, \ | |
826 | .sysenter_cs = __KERNEL_CS, \ | |
827 | .io_bitmap_ptr = NULL, \ | |
2f66dcc9 GOC |
828 | } |
829 | ||
2f66dcc9 GOC |
830 | extern unsigned long thread_saved_pc(struct task_struct *tsk); |
831 | ||
832 | #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) | |
833 | #define KSTK_TOP(info) \ | |
834 | ({ \ | |
835 | unsigned long *__ptr = (unsigned long *)(info); \ | |
836 | (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ | |
837 | }) | |
838 | ||
839 | /* | |
840 | * The below -8 is to reserve 8 bytes on top of the ring0 stack. | |
841 | * This is necessary to guarantee that the entire "struct pt_regs" | |
b595076a | 842 | * is accessible even if the CPU haven't stored the SS/ESP registers |
2f66dcc9 GOC |
843 | * on the stack (interrupt gate does not save these registers |
844 | * when switching to the same priv ring). | |
845 | * Therefore beware: accessing the ss/esp fields of the | |
846 | * "struct pt_regs" is possible, but they may contain the | |
847 | * completely wrong values. | |
848 | */ | |
849 | #define task_pt_regs(task) \ | |
850 | ({ \ | |
851 | struct pt_regs *__regs__; \ | |
3ee4298f AL |
852 | __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task)) - \ |
853 | TOP_OF_KERNEL_STACK_PADDING); \ | |
2f66dcc9 GOC |
854 | __regs__ - 1; \ |
855 | }) | |
856 | ||
4d46a89e | 857 | #define KSTK_ESP(task) (task_pt_regs(task)->sp) |
2f66dcc9 GOC |
858 | |
859 | #else | |
860 | /* | |
07114f0f AL |
861 | * User space process size. 47bits minus one guard page. The guard |
862 | * page is necessary on Intel CPUs: if a SYSCALL instruction is at | |
863 | * the highest possible canonical userspace address, then that | |
864 | * syscall will enter the kernel with a non-canonical return | |
865 | * address, and SYSRET will explode dangerously. We avoid this | |
866 | * particular problem by preventing anything from being mapped | |
867 | * at the maximum canonical address. | |
2f66dcc9 | 868 | */ |
d9517346 | 869 | #define TASK_SIZE_MAX ((1UL << 47) - PAGE_SIZE) |
2f66dcc9 GOC |
870 | |
871 | /* This decides where the kernel will search for a free chunk of vm | |
872 | * space during mmap's. | |
873 | */ | |
4d46a89e IM |
874 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ |
875 | 0xc0000000 : 0xFFFFe000) | |
2f66dcc9 | 876 | |
6bd33008 | 877 | #define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \ |
d9517346 | 878 | IA32_PAGE_OFFSET : TASK_SIZE_MAX) |
6bd33008 | 879 | #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \ |
d9517346 | 880 | IA32_PAGE_OFFSET : TASK_SIZE_MAX) |
2f66dcc9 | 881 | |
922a70d3 | 882 | #define STACK_TOP TASK_SIZE |
d9517346 | 883 | #define STACK_TOP_MAX TASK_SIZE_MAX |
922a70d3 | 884 | |
2f66dcc9 GOC |
885 | #define INIT_THREAD { \ |
886 | .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ | |
887 | } | |
888 | ||
2f66dcc9 GOC |
889 | /* |
890 | * Return saved PC of a blocked thread. | |
891 | * What is this good for? it will be always the scheduler or ret_from_fork. | |
892 | */ | |
4d46a89e | 893 | #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8)) |
2f66dcc9 | 894 | |
4d46a89e | 895 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
89240ba0 | 896 | extern unsigned long KSTK_ESP(struct task_struct *task); |
d046ff8b L |
897 | |
898 | /* | |
899 | * User space RSP while inside the SYSCALL fast path | |
900 | */ | |
901 | DECLARE_PER_CPU(unsigned long, old_rsp); | |
902 | ||
2f66dcc9 GOC |
903 | #endif /* CONFIG_X86_64 */ |
904 | ||
513ad84b IM |
905 | extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
906 | unsigned long new_sp); | |
907 | ||
4d46a89e IM |
908 | /* |
909 | * This decides where the kernel will search for a free chunk of vm | |
683e0253 GOC |
910 | * space during mmap's. |
911 | */ | |
912 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) | |
913 | ||
4d46a89e | 914 | #define KSTK_EIP(task) (task_pt_regs(task)->ip) |
683e0253 | 915 | |
529e25f6 EB |
916 | /* Get/set a process' ability to use the timestamp counter instruction */ |
917 | #define GET_TSC_CTL(adr) get_tsc_mode((adr)) | |
918 | #define SET_TSC_CTL(val) set_tsc_mode((val)) | |
919 | ||
920 | extern int get_tsc_mode(unsigned long adr); | |
921 | extern int set_tsc_mode(unsigned int val); | |
922 | ||
fe3d197f DH |
923 | /* Register/unregister a process' MPX related resource */ |
924 | #define MPX_ENABLE_MANAGEMENT(tsk) mpx_enable_management((tsk)) | |
925 | #define MPX_DISABLE_MANAGEMENT(tsk) mpx_disable_management((tsk)) | |
926 | ||
927 | #ifdef CONFIG_X86_INTEL_MPX | |
928 | extern int mpx_enable_management(struct task_struct *tsk); | |
929 | extern int mpx_disable_management(struct task_struct *tsk); | |
930 | #else | |
931 | static inline int mpx_enable_management(struct task_struct *tsk) | |
932 | { | |
933 | return -EINVAL; | |
934 | } | |
935 | static inline int mpx_disable_management(struct task_struct *tsk) | |
936 | { | |
937 | return -EINVAL; | |
938 | } | |
939 | #endif /* CONFIG_X86_INTEL_MPX */ | |
940 | ||
8b84c8df | 941 | extern u16 amd_get_nb_id(int cpu); |
6a812691 | 942 | |
96e39ac0 JW |
943 | static inline uint32_t hypervisor_cpuid_base(const char *sig, uint32_t leaves) |
944 | { | |
945 | uint32_t base, eax, signature[3]; | |
946 | ||
947 | for (base = 0x40000000; base < 0x40010000; base += 0x100) { | |
948 | cpuid(base, &eax, &signature[0], &signature[1], &signature[2]); | |
949 | ||
950 | if (!memcmp(sig, signature, 12) && | |
951 | (leaves == 0 || ((eax - base) >= leaves))) | |
952 | return base; | |
953 | } | |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
f05e798a DH |
958 | extern unsigned long arch_align_stack(unsigned long sp); |
959 | extern void free_init_pages(char *what, unsigned long begin, unsigned long end); | |
960 | ||
961 | void default_idle(void); | |
6a377ddc LB |
962 | #ifdef CONFIG_XEN |
963 | bool xen_set_default_idle(void); | |
964 | #else | |
965 | #define xen_set_default_idle 0 | |
966 | #endif | |
f05e798a DH |
967 | |
968 | void stop_this_cpu(void *dummy); | |
4d067d8e | 969 | void df_debug(struct pt_regs *regs, long error_code); |
1965aae3 | 970 | #endif /* _ASM_X86_PROCESSOR_H */ |