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-rw-r--r--include/asm-x86/thread_info.h264
1 files changed, 0 insertions, 264 deletions
diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
deleted file mode 100644
index 3f4e52bb77f5..000000000000
--- a/include/asm-x86/thread_info.h
+++ /dev/null
@@ -1,264 +0,0 @@
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
7#ifndef ASM_X86__THREAD_INFO_H
8#define ASM_X86__THREAD_INFO_H
9
10#include <linux/compiler.h>
11#include <asm/page.h>
12#include <asm/types.h>
13
14/*
15 * low level task data that entry.S needs immediate access to
16 * - this struct should fit entirely inside of one cache line
17 * - this struct shares the supervisor stack pages
18 */
19#ifndef __ASSEMBLY__
20struct task_struct;
21struct exec_domain;
22#include <asm/processor.h>
23
24struct thread_info {
25 struct task_struct *task; /* main task structure */
26 struct exec_domain *exec_domain; /* execution domain */
27 unsigned long flags; /* low level flags */
28 __u32 status; /* thread synchronous flags */
29 __u32 cpu; /* current CPU */
30 int preempt_count; /* 0 => preemptable,
31 <0 => BUG */
32 mm_segment_t addr_limit;
33 struct restart_block restart_block;
34 void __user *sysenter_return;
35#ifdef CONFIG_X86_32
36 unsigned long previous_esp; /* ESP of the previous stack in
37 case of nested (IRQ) stacks
38 */
39 __u8 supervisor_stack[0];
40#endif
41};
42
43#define INIT_THREAD_INFO(tsk) \
44{ \
45 .task = &tsk, \
46 .exec_domain = &default_exec_domain, \
47 .flags = 0, \
48 .cpu = 0, \
49 .preempt_count = 1, \
50 .addr_limit = KERNEL_DS, \
51 .restart_block = { \
52 .fn = do_no_restart_syscall, \
53 }, \
54}
55
56#define init_thread_info (init_thread_union.thread_info)
57#define init_stack (init_thread_union.stack)
58
59#else /* !__ASSEMBLY__ */
60
61#include <asm/asm-offsets.h>
62
63#endif
64
65/*
66 * thread information flags
67 * - these are process state flags that various assembly files
68 * may need to access
69 * - pending work-to-be-done flags are in LSW
70 * - other flags in MSW
71 * Warning: layout of LSW is hardcoded in entry.S
72 */
73#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
74#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
75#define TIF_SIGPENDING 2 /* signal pending */
76#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
77#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
78#define TIF_IRET 5 /* force IRET */
79#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
80#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
81#define TIF_SECCOMP 8 /* secure computing */
82#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
83#define TIF_NOTSC 16 /* TSC is not accessible in userland */
84#define TIF_IA32 17 /* 32bit process */
85#define TIF_FORK 18 /* ret_from_fork */
86#define TIF_ABI_PENDING 19
87#define TIF_MEMDIE 20
88#define TIF_DEBUG 21 /* uses debug registers */
89#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
90#define TIF_FREEZE 23 /* is freezing for suspend */
91#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
92#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
93#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
94#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
95
96#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
97#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
98#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
99#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
100#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
101#define _TIF_IRET (1 << TIF_IRET)
102#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
103#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
104#define _TIF_SECCOMP (1 << TIF_SECCOMP)
105#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
106#define _TIF_NOTSC (1 << TIF_NOTSC)
107#define _TIF_IA32 (1 << TIF_IA32)
108#define _TIF_FORK (1 << TIF_FORK)
109#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
110#define _TIF_DEBUG (1 << TIF_DEBUG)
111#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
112#define _TIF_FREEZE (1 << TIF_FREEZE)
113#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
114#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
115#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
116#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
117
118/* work to do in syscall_trace_enter() */
119#define _TIF_WORK_SYSCALL_ENTRY \
120 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_EMU | \
121 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | _TIF_SINGLESTEP)
122
123/* work to do in syscall_trace_leave() */
124#define _TIF_WORK_SYSCALL_EXIT \
125 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)
126
127/* work to do on interrupt/exception return */
128#define _TIF_WORK_MASK \
129 (0x0000FFFF & \
130 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \
131 _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU))
132
133/* work to do on any return to user space */
134#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
135
136/* Only used for 64 bit */
137#define _TIF_DO_NOTIFY_MASK \
138 (_TIF_SIGPENDING|_TIF_MCE_NOTIFY|_TIF_NOTIFY_RESUME)
139
140/* flags to check in __switch_to() */
141#define _TIF_WORK_CTXSW \
142 (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS| \
143 _TIF_NOTSC)
144
145#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
146#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
147
148#define PREEMPT_ACTIVE 0x10000000
149
150/* thread information allocation */
151#ifdef CONFIG_DEBUG_STACK_USAGE
152#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
153#else
154#define THREAD_FLAGS GFP_KERNEL
155#endif
156
157#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
158
159#define alloc_thread_info(tsk) \
160 ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
161
162#ifdef CONFIG_X86_32
163
164#define STACK_WARN (THREAD_SIZE/8)
165/*
166 * macros/functions for gaining access to the thread information structure
167 *
168 * preempt_count needs to be 1 initially, until the scheduler is functional.
169 */
170#ifndef __ASSEMBLY__
171
172
173/* how to get the current stack pointer from C */
174register unsigned long current_stack_pointer asm("esp") __used;
175
176/* how to get the thread information struct from C */
177static inline struct thread_info *current_thread_info(void)
178{
179 return (struct thread_info *)
180 (current_stack_pointer & ~(THREAD_SIZE - 1));
181}
182
183#else /* !__ASSEMBLY__ */
184
185/* how to get the thread information struct from ASM */
186#define GET_THREAD_INFO(reg) \
187 movl $-THREAD_SIZE, reg; \
188 andl %esp, reg
189
190/* use this one if reg already contains %esp */
191#define GET_THREAD_INFO_WITH_ESP(reg) \
192 andl $-THREAD_SIZE, reg
193
194#endif
195
196#else /* X86_32 */
197
198#include <asm/pda.h>
199
200/*
201 * macros/functions for gaining access to the thread information structure
202 * preempt_count needs to be 1 initially, until the scheduler is functional.
203 */
204#ifndef __ASSEMBLY__
205static inline struct thread_info *current_thread_info(void)
206{
207 struct thread_info *ti;
208 ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
209 return ti;
210}
211
212/* do not use in interrupt context */
213static inline struct thread_info *stack_thread_info(void)
214{
215 struct thread_info *ti;
216 asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
217 return ti;
218}
219
220#else /* !__ASSEMBLY__ */
221
222/* how to get the thread information struct from ASM */
223#define GET_THREAD_INFO(reg) \
224 movq %gs:pda_kernelstack,reg ; \
225 subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
226
227#endif
228
229#endif /* !X86_32 */
230
231/*
232 * Thread-synchronous status.
233 *
234 * This is different from the flags in that nobody else
235 * ever touches our thread-synchronous status, so we don't
236 * have to worry about atomic accesses.
237 */
238#define TS_USEDFPU 0x0001 /* FPU was used by this task
239 this quantum (SMP) */
240#define TS_COMPAT 0x0002 /* 32bit syscall active (64BIT)*/
241#define TS_POLLING 0x0004 /* true if in idle loop
242 and not sleeping */
243#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */
244#define TS_XSAVE 0x0010 /* Use xsave/xrstor */
245
246#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
247
248#ifndef __ASSEMBLY__
249#define HAVE_SET_RESTORE_SIGMASK 1
250static inline void set_restore_sigmask(void)
251{
252 struct thread_info *ti = current_thread_info();
253 ti->status |= TS_RESTORE_SIGMASK;
254 set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
255}
256#endif /* !__ASSEMBLY__ */
257
258#ifndef __ASSEMBLY__
259extern void arch_task_cache_init(void);
260extern void free_thread_info(struct thread_info *ti);
261extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
262#define arch_task_cache_init arch_task_cache_init
263#endif
264#endif /* ASM_X86__THREAD_INFO_H */
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