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-rw-r--r--include/asm-x86/thread_info.h366
-rw-r--r--include/asm-x86/thread_info_32.h196
-rw-r--r--include/asm-x86/thread_info_64.h186
3 files changed, 364 insertions, 384 deletions
diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
index 77244f17993f..d59384ac0ba6 100644
--- a/include/asm-x86/thread_info.h
+++ b/include/asm-x86/thread_info.h
@@ -1,10 +1,372 @@
1/* thread_info.h: low-level thread information
2 *
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
5 */
6
1#ifndef _ASM_X86_THREAD_INFO_H 7#ifndef _ASM_X86_THREAD_INFO_H
8#define _ASM_X86_THREAD_INFO_H
9
2#ifdef CONFIG_X86_32 10#ifdef CONFIG_X86_32
3# include "thread_info_32.h" 11#include <linux/compiler.h>
12#include <asm/page.h>
13
14#ifndef __ASSEMBLY__
15#include <asm/processor.h>
16#endif
17
18/*
19 * low level task data that entry.S needs immediate access to
20 * - this struct should fit entirely inside of one cache line
21 * - this struct shares the supervisor stack pages
22 * - if the contents of this structure are changed,
23 * the assembly constants must also be changed
24 */
25#ifndef __ASSEMBLY__
26
27struct thread_info {
28 struct task_struct *task; /* main task structure */
29 struct exec_domain *exec_domain; /* execution domain */
30 unsigned long flags; /* low level flags */
31 unsigned long status; /* thread-synchronous flags */
32 __u32 cpu; /* current CPU */
33 int preempt_count; /* 0 => preemptable,
34 <0 => BUG */
35 mm_segment_t addr_limit; /* thread address space:
36 0-0xBFFFFFFF user-thread
37 0-0xFFFFFFFF kernel-thread
38 */
39 void *sysenter_return;
40 struct restart_block restart_block;
41 unsigned long previous_esp; /* ESP of the previous stack in
42 case of nested (IRQ) stacks
43 */
44 __u8 supervisor_stack[0];
45};
46
47#else /* !__ASSEMBLY__ */
48
49#include <asm/asm-offsets.h>
50
51#endif
52
53#define PREEMPT_ACTIVE 0x10000000
54#ifdef CONFIG_4KSTACKS
55#define THREAD_SIZE (4096)
4#else 56#else
5# include "thread_info_64.h" 57#define THREAD_SIZE (8192)
6#endif 58#endif
7 59
60#define STACK_WARN (THREAD_SIZE/8)
61/*
62 * macros/functions for gaining access to the thread information structure
63 *
64 * preempt_count needs to be 1 initially, until the scheduler is functional.
65 */
66#ifndef __ASSEMBLY__
67
68#define INIT_THREAD_INFO(tsk) \
69{ \
70 .task = &tsk, \
71 .exec_domain = &default_exec_domain, \
72 .flags = 0, \
73 .cpu = 0, \
74 .preempt_count = 1, \
75 .addr_limit = KERNEL_DS, \
76 .restart_block = { \
77 .fn = do_no_restart_syscall, \
78 }, \
79}
80
81#define init_thread_info (init_thread_union.thread_info)
82#define init_stack (init_thread_union.stack)
83
84
85/* how to get the current stack pointer from C */
86register unsigned long current_stack_pointer asm("esp") __used;
87
88/* how to get the thread information struct from C */
89static inline struct thread_info *current_thread_info(void)
90{
91 return (struct thread_info *)
92 (current_stack_pointer & ~(THREAD_SIZE - 1));
93}
94
95/* thread information allocation */
96#ifdef CONFIG_DEBUG_STACK_USAGE
97#define alloc_thread_info(tsk) ((struct thread_info *) \
98 __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
99#else
100#define alloc_thread_info(tsk) ((struct thread_info *) \
101 __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
102#endif
103
104#else /* !__ASSEMBLY__ */
105
106/* how to get the thread information struct from ASM */
107#define GET_THREAD_INFO(reg) \
108 movl $-THREAD_SIZE, reg; \
109 andl %esp, reg
110
111/* use this one if reg already contains %esp */
112#define GET_THREAD_INFO_WITH_ESP(reg) \
113 andl $-THREAD_SIZE, reg
114
115#endif
116
117/*
118 * thread information flags
119 * - these are process state flags that various
120 * assembly files may need to access
121 * - pending work-to-be-done flags are in LSW
122 * - other flags in MSW
123 */
124#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
125#define TIF_SIGPENDING 1 /* signal pending */
126#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
127#define TIF_SINGLESTEP 3 /* restore singlestep on return to
128 user mode */
129#define TIF_IRET 4 /* return with iret */
130#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
131#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
132#define TIF_SECCOMP 7 /* secure computing */
133#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
134#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
135#define TIF_MEMDIE 16
136#define TIF_DEBUG 17 /* uses debug registers */
137#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
138#define TIF_FREEZE 19 /* is freezing for suspend */
139#define TIF_NOTSC 20 /* TSC is not accessible in userland */
140#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
141#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
142#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
143#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */
144
145#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
146#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
147#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
148#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
149#define _TIF_IRET (1 << TIF_IRET)
150#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
151#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
152#define _TIF_SECCOMP (1 << TIF_SECCOMP)
153#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
154#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
155#define _TIF_DEBUG (1 << TIF_DEBUG)
156#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
157#define _TIF_FREEZE (1 << TIF_FREEZE)
158#define _TIF_NOTSC (1 << TIF_NOTSC)
159#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
160#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
161#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
162#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
163
164/* work to do on interrupt/exception return */
165#define _TIF_WORK_MASK \
166 (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
167 _TIF_SECCOMP | _TIF_SYSCALL_EMU))
168/* work to do on any return to u-space */
169#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
170
171/* flags to check in __switch_to() */
172#define _TIF_WORK_CTXSW \
173 (_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
174 _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
175#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
176#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
177
178
179/*
180 * Thread-synchronous status.
181 *
182 * This is different from the flags in that nobody else
183 * ever touches our thread-synchronous status, so we don't
184 * have to worry about atomic accesses.
185 */
186#define TS_USEDFPU 0x0001 /* FPU was used by this task
187 this quantum (SMP) */
188#define TS_POLLING 0x0002 /* True if in idle loop
189 and not sleeping */
190
191#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
192
193#else /* X86_32 */
194
195#include <asm/page.h>
196#include <asm/types.h>
197#include <asm/pda.h>
198
199/*
200 * low level task data that entry.S needs immediate access to
201 * - this struct should fit entirely inside of one cache line
202 * - this struct shares the supervisor stack pages
203 */
204#ifndef __ASSEMBLY__
205struct task_struct;
206struct exec_domain;
207#include <asm/processor.h>
208
209struct thread_info {
210 struct task_struct *task; /* main task structure */
211 struct exec_domain *exec_domain; /* execution domain */
212 __u32 flags; /* low level flags */
213 __u32 status; /* thread synchronous flags */
214 __u32 cpu; /* current CPU */
215 int preempt_count; /* 0 => preemptable,
216 <0 => BUG */
217 mm_segment_t addr_limit;
218 struct restart_block restart_block;
219#ifdef CONFIG_IA32_EMULATION
220 void __user *sysenter_return;
221#endif
222};
223#endif
224
225/*
226 * macros/functions for gaining access to the thread information structure
227 * preempt_count needs to be 1 initially, until the scheduler is functional.
228 */
229#ifndef __ASSEMBLY__
230#define INIT_THREAD_INFO(tsk) \
231{ \
232 .task = &tsk, \
233 .exec_domain = &default_exec_domain, \
234 .flags = 0, \
235 .cpu = 0, \
236 .preempt_count = 1, \
237 .addr_limit = KERNEL_DS, \
238 .restart_block = { \
239 .fn = do_no_restart_syscall, \
240 }, \
241}
242
243#define init_thread_info (init_thread_union.thread_info)
244#define init_stack (init_thread_union.stack)
245
246static inline struct thread_info *current_thread_info(void)
247{
248 struct thread_info *ti;
249 ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
250 return ti;
251}
252
253/* do not use in interrupt context */
254static inline struct thread_info *stack_thread_info(void)
255{
256 struct thread_info *ti;
257 asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
258 return ti;
259}
260
261/* thread information allocation */
262#ifdef CONFIG_DEBUG_STACK_USAGE
263#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
264#else
265#define THREAD_FLAGS GFP_KERNEL
266#endif
267
268#define alloc_thread_info(tsk) \
269 ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
270
271#else /* !__ASSEMBLY__ */
272
273/* how to get the thread information struct from ASM */
274#define GET_THREAD_INFO(reg) \
275 movq %gs:pda_kernelstack,reg ; \
276 subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
277
278#endif
279
280/*
281 * thread information flags
282 * - these are process state flags that various assembly files
283 * may need to access
284 * - pending work-to-be-done flags are in LSW
285 * - other flags in MSW
286 * Warning: layout of LSW is hardcoded in entry.S
287 */
288#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
289#define TIF_SIGPENDING 2 /* signal pending */
290#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
291#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
292#define TIF_IRET 5 /* force IRET */
293#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
294#define TIF_SECCOMP 8 /* secure computing */
295#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
296#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
297#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
298/* 16 free */
299#define TIF_IA32 17 /* 32bit process */
300#define TIF_FORK 18 /* ret_from_fork */
301#define TIF_ABI_PENDING 19
302#define TIF_MEMDIE 20
303#define TIF_DEBUG 21 /* uses debug registers */
304#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
305#define TIF_FREEZE 23 /* is freezing for suspend */
306#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
307#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
308#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
309#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
310#define TIF_NOTSC 28 /* TSC is not accessible in userland */
311
312#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
313#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
314#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
315#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
316#define _TIF_IRET (1 << TIF_IRET)
317#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
318#define _TIF_SECCOMP (1 << TIF_SECCOMP)
319#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
320#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
321#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
322#define _TIF_IA32 (1 << TIF_IA32)
323#define _TIF_FORK (1 << TIF_FORK)
324#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
325#define _TIF_DEBUG (1 << TIF_DEBUG)
326#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
327#define _TIF_FREEZE (1 << TIF_FREEZE)
328#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
329#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
330#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
331#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
332#define _TIF_NOTSC (1 << TIF_NOTSC)
333
334/* work to do on interrupt/exception return */
335#define _TIF_WORK_MASK \
336 (0x0000FFFF & \
337 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
338/* work to do on any return to user space */
339#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
340
341#define _TIF_DO_NOTIFY_MASK \
342 (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
343
344/* flags to check in __switch_to() */
345#define _TIF_WORK_CTXSW \
346 (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
347#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
348#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
349
350#define PREEMPT_ACTIVE 0x10000000
351
352/*
353 * Thread-synchronous status.
354 *
355 * This is different from the flags in that nobody else
356 * ever touches our thread-synchronous status, so we don't
357 * have to worry about atomic accesses.
358 */
359#define TS_USEDFPU 0x0001 /* FPU was used by this task
360 this quantum (SMP) */
361#define TS_COMPAT 0x0002 /* 32bit syscall active */
362#define TS_POLLING 0x0004 /* true if in idle loop
363 and not sleeping */
364
365#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
366
367#endif /* !X86_32 */
368
369
8#ifndef __ASSEMBLY__ 370#ifndef __ASSEMBLY__
9extern void arch_task_cache_init(void); 371extern void arch_task_cache_init(void);
10extern void free_thread_info(struct thread_info *ti); 372extern void free_thread_info(struct thread_info *ti);
diff --git a/include/asm-x86/thread_info_32.h b/include/asm-x86/thread_info_32.h
deleted file mode 100644
index 531859962096..000000000000
--- a/include/asm-x86/thread_info_32.h
+++ /dev/null
@@ -1,196 +0,0 @@
1/* thread_info.h: i386 low-level thread information
2 *
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
5 */
6
7#ifndef _ASM_THREAD_INFO_H
8#define _ASM_THREAD_INFO_H
9
10#ifdef __KERNEL__
11
12#include <linux/compiler.h>
13#include <asm/page.h>
14
15#ifndef __ASSEMBLY__
16#include <asm/processor.h>
17#endif
18
19/*
20 * low level task data that entry.S needs immediate access to
21 * - this struct should fit entirely inside of one cache line
22 * - this struct shares the supervisor stack pages
23 * - if the contents of this structure are changed,
24 * the assembly constants must also be changed
25 */
26#ifndef __ASSEMBLY__
27
28struct thread_info {
29 struct task_struct *task; /* main task structure */
30 struct exec_domain *exec_domain; /* execution domain */
31 unsigned long flags; /* low level flags */
32 unsigned long status; /* thread-synchronous flags */
33 __u32 cpu; /* current CPU */
34 int preempt_count; /* 0 => preemptable,
35 <0 => BUG */
36 mm_segment_t addr_limit; /* thread address space:
37 0-0xBFFFFFFF user-thread
38 0-0xFFFFFFFF kernel-thread
39 */
40 void *sysenter_return;
41 struct restart_block restart_block;
42 unsigned long previous_esp; /* ESP of the previous stack in
43 case of nested (IRQ) stacks
44 */
45 __u8 supervisor_stack[0];
46};
47
48#else /* !__ASSEMBLY__ */
49
50#include <asm/asm-offsets.h>
51
52#endif
53
54#define PREEMPT_ACTIVE 0x10000000
55#ifdef CONFIG_4KSTACKS
56#define THREAD_SIZE (4096)
57#else
58#define THREAD_SIZE (8192)
59#endif
60
61#define STACK_WARN (THREAD_SIZE/8)
62/*
63 * macros/functions for gaining access to the thread information structure
64 *
65 * preempt_count needs to be 1 initially, until the scheduler is functional.
66 */
67#ifndef __ASSEMBLY__
68
69#define INIT_THREAD_INFO(tsk) \
70{ \
71 .task = &tsk, \
72 .exec_domain = &default_exec_domain, \
73 .flags = 0, \
74 .cpu = 0, \
75 .preempt_count = 1, \
76 .addr_limit = KERNEL_DS, \
77 .restart_block = { \
78 .fn = do_no_restart_syscall, \
79 }, \
80}
81
82#define init_thread_info (init_thread_union.thread_info)
83#define init_stack (init_thread_union.stack)
84
85
86/* how to get the current stack pointer from C */
87register unsigned long current_stack_pointer asm("esp") __used;
88
89/* how to get the thread information struct from C */
90static inline struct thread_info *current_thread_info(void)
91{
92 return (struct thread_info *)
93 (current_stack_pointer & ~(THREAD_SIZE - 1));
94}
95
96/* thread information allocation */
97#ifdef CONFIG_DEBUG_STACK_USAGE
98#define alloc_thread_info(tsk) ((struct thread_info *) \
99 __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
100#else
101#define alloc_thread_info(tsk) ((struct thread_info *) \
102 __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
103#endif
104
105#else /* !__ASSEMBLY__ */
106
107/* how to get the thread information struct from ASM */
108#define GET_THREAD_INFO(reg) \
109 movl $-THREAD_SIZE, reg; \
110 andl %esp, reg
111
112/* use this one if reg already contains %esp */
113#define GET_THREAD_INFO_WITH_ESP(reg) \
114 andl $-THREAD_SIZE, reg
115
116#endif
117
118/*
119 * thread information flags
120 * - these are process state flags that various
121 * assembly files may need to access
122 * - pending work-to-be-done flags are in LSW
123 * - other flags in MSW
124 */
125#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
126#define TIF_SIGPENDING 1 /* signal pending */
127#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
128#define TIF_SINGLESTEP 3 /* restore singlestep on return to
129 user mode */
130#define TIF_IRET 4 /* return with iret */
131#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
132#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
133#define TIF_SECCOMP 7 /* secure computing */
134#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
135#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
136#define TIF_MEMDIE 16
137#define TIF_DEBUG 17 /* uses debug registers */
138#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
139#define TIF_FREEZE 19 /* is freezing for suspend */
140#define TIF_NOTSC 20 /* TSC is not accessible in userland */
141#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
142#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
143#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
144#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */
145
146#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
147#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
148#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
149#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
150#define _TIF_IRET (1 << TIF_IRET)
151#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
152#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
153#define _TIF_SECCOMP (1 << TIF_SECCOMP)
154#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
155#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
156#define _TIF_DEBUG (1 << TIF_DEBUG)
157#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
158#define _TIF_FREEZE (1 << TIF_FREEZE)
159#define _TIF_NOTSC (1 << TIF_NOTSC)
160#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
161#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
162#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
163#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
164
165/* work to do on interrupt/exception return */
166#define _TIF_WORK_MASK \
167 (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
168 _TIF_SECCOMP | _TIF_SYSCALL_EMU))
169/* work to do on any return to u-space */
170#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
171
172/* flags to check in __switch_to() */
173#define _TIF_WORK_CTXSW \
174 (_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
175 _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
176#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
177#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
178
179
180/*
181 * Thread-synchronous status.
182 *
183 * This is different from the flags in that nobody else
184 * ever touches our thread-synchronous status, so we don't
185 * have to worry about atomic accesses.
186 */
187#define TS_USEDFPU 0x0001 /* FPU was used by this task
188 this quantum (SMP) */
189#define TS_POLLING 0x0002 /* True if in idle loop
190 and not sleeping */
191
192#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
193
194#endif /* __KERNEL__ */
195
196#endif /* _ASM_THREAD_INFO_H */
diff --git a/include/asm-x86/thread_info_64.h b/include/asm-x86/thread_info_64.h
deleted file mode 100644
index ed664e874dec..000000000000
--- a/include/asm-x86/thread_info_64.h
+++ /dev/null
@@ -1,186 +0,0 @@
1/* thread_info.h: x86_64 low-level thread information
2 *
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
5 */
6
7#ifndef _ASM_THREAD_INFO_H
8#define _ASM_THREAD_INFO_H
9
10#ifdef __KERNEL__
11
12#include <asm/page.h>
13#include <asm/types.h>
14#include <asm/pda.h>
15
16/*
17 * low level task data that entry.S needs immediate access to
18 * - this struct should fit entirely inside of one cache line
19 * - this struct shares the supervisor stack pages
20 */
21#ifndef __ASSEMBLY__
22struct task_struct;
23struct exec_domain;
24#include <asm/processor.h>
25
26struct thread_info {
27 struct task_struct *task; /* main task structure */
28 struct exec_domain *exec_domain; /* execution domain */
29 __u32 flags; /* low level flags */
30 __u32 status; /* thread synchronous flags */
31 __u32 cpu; /* current CPU */
32 int preempt_count; /* 0 => preemptable,
33 <0 => BUG */
34 mm_segment_t addr_limit;
35 struct restart_block restart_block;
36#ifdef CONFIG_IA32_EMULATION
37 void __user *sysenter_return;
38#endif
39};
40#endif
41
42/*
43 * macros/functions for gaining access to the thread information structure
44 * preempt_count needs to be 1 initially, until the scheduler is functional.
45 */
46#ifndef __ASSEMBLY__
47#define INIT_THREAD_INFO(tsk) \
48{ \
49 .task = &tsk, \
50 .exec_domain = &default_exec_domain, \
51 .flags = 0, \
52 .cpu = 0, \
53 .preempt_count = 1, \
54 .addr_limit = KERNEL_DS, \
55 .restart_block = { \
56 .fn = do_no_restart_syscall, \
57 }, \
58}
59
60#define init_thread_info (init_thread_union.thread_info)
61#define init_stack (init_thread_union.stack)
62
63static inline struct thread_info *current_thread_info(void)
64{
65 struct thread_info *ti;
66 ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
67 return ti;
68}
69
70/* do not use in interrupt context */
71static inline struct thread_info *stack_thread_info(void)
72{
73 struct thread_info *ti;
74 asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
75 return ti;
76}
77
78/* thread information allocation */
79#ifdef CONFIG_DEBUG_STACK_USAGE
80#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
81#else
82#define THREAD_FLAGS GFP_KERNEL
83#endif
84
85#define alloc_thread_info(tsk) \
86 ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
87
88#else /* !__ASSEMBLY__ */
89
90/* how to get the thread information struct from ASM */
91#define GET_THREAD_INFO(reg) \
92 movq %gs:pda_kernelstack,reg ; \
93 subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
94
95#endif
96
97/*
98 * thread information flags
99 * - these are process state flags that various assembly files
100 * may need to access
101 * - pending work-to-be-done flags are in LSW
102 * - other flags in MSW
103 * Warning: layout of LSW is hardcoded in entry.S
104 */
105#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
106#define TIF_SIGPENDING 2 /* signal pending */
107#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
108#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
109#define TIF_IRET 5 /* force IRET */
110#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
111#define TIF_SECCOMP 8 /* secure computing */
112#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
113#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
114#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
115/* 16 free */
116#define TIF_IA32 17 /* 32bit process */
117#define TIF_FORK 18 /* ret_from_fork */
118#define TIF_ABI_PENDING 19
119#define TIF_MEMDIE 20
120#define TIF_DEBUG 21 /* uses debug registers */
121#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
122#define TIF_FREEZE 23 /* is freezing for suspend */
123#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
124#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
125#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
126#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
127#define TIF_NOTSC 28 /* TSC is not accessible in userland */
128
129#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
130#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
131#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
132#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
133#define _TIF_IRET (1 << TIF_IRET)
134#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
135#define _TIF_SECCOMP (1 << TIF_SECCOMP)
136#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
137#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
138#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
139#define _TIF_IA32 (1 << TIF_IA32)
140#define _TIF_FORK (1 << TIF_FORK)
141#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
142#define _TIF_DEBUG (1 << TIF_DEBUG)
143#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
144#define _TIF_FREEZE (1 << TIF_FREEZE)
145#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
146#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
147#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
148#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
149#define _TIF_NOTSC (1 << TIF_NOTSC)
150
151/* work to do on interrupt/exception return */
152#define _TIF_WORK_MASK \
153 (0x0000FFFF & \
154 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
155/* work to do on any return to user space */
156#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
157
158#define _TIF_DO_NOTIFY_MASK \
159 (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
160
161/* flags to check in __switch_to() */
162#define _TIF_WORK_CTXSW \
163 (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
164#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
165#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
166
167#define PREEMPT_ACTIVE 0x10000000
168
169/*
170 * Thread-synchronous status.
171 *
172 * This is different from the flags in that nobody else
173 * ever touches our thread-synchronous status, so we don't
174 * have to worry about atomic accesses.
175 */
176#define TS_USEDFPU 0x0001 /* FPU was used by this task
177 this quantum (SMP) */
178#define TS_COMPAT 0x0002 /* 32bit syscall active */
179#define TS_POLLING 0x0004 /* true if in idle loop
180 and not sleeping */
181
182#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
183
184#endif /* __KERNEL__ */
185
186#endif /* _ASM_THREAD_INFO_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 08:21:31 -0500