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-rw-r--r--include/asm-x86/page_32.h8
-rw-r--r--include/asm-x86/thread_info.h248
-rw-r--r--include/asm-x86/thread_info_32.h205
-rw-r--r--include/asm-x86/thread_info_64.h195
4 files changed, 254 insertions, 402 deletions
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index ccf0ba3c3aba..73ed2e4ebf95 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -13,6 +13,14 @@
13 */ 13 */
14#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) 14#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
15 15
16#ifdef CONFIG_4KSTACKS
17#define THREAD_ORDER 0
18#else
19#define THREAD_ORDER 1
20#endif
21#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
22
23
16#ifdef CONFIG_X86_PAE 24#ifdef CONFIG_X86_PAE
17/* 44=32+12, the limit we can fit into an unsigned long pfn */ 25/* 44=32+12, the limit we can fit into an unsigned long pfn */
18#define __PHYSICAL_MASK_SHIFT 44 26#define __PHYSICAL_MASK_SHIFT 44
diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
index 77244f17993f..895339d2bc0b 100644
--- a/include/asm-x86/thread_info.h
+++ b/include/asm-x86/thread_info.h
@@ -1,9 +1,253 @@
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
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_SIGPENDING 2 /* signal pending */
75#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
76#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
77#define TIF_IRET 5 /* force IRET */
2#ifdef CONFIG_X86_32 78#ifdef CONFIG_X86_32
3# include "thread_info_32.h" 79#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
80#endif
81#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
82#define TIF_SECCOMP 8 /* secure computing */
83#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
84#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
85#define TIF_NOTSC 16 /* TSC is not accessible in userland */
86#define TIF_IA32 17 /* 32bit process */
87#define TIF_FORK 18 /* ret_from_fork */
88#define TIF_ABI_PENDING 19
89#define TIF_MEMDIE 20
90#define TIF_DEBUG 21 /* uses debug registers */
91#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
92#define TIF_FREEZE 23 /* is freezing for suspend */
93#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
94#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
95#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
96#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
97
98#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
99#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
100#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
101#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
102#define _TIF_IRET (1 << TIF_IRET)
103#ifdef CONFIG_X86_32
104#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
4#else 105#else
5# include "thread_info_64.h" 106#define _TIF_SYSCALL_EMU 0
6#endif 107#endif
108#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
109#define _TIF_SECCOMP (1 << TIF_SECCOMP)
110#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
111#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
112#define _TIF_NOTSC (1 << TIF_NOTSC)
113#define _TIF_IA32 (1 << TIF_IA32)
114#define _TIF_FORK (1 << TIF_FORK)
115#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
116#define _TIF_DEBUG (1 << TIF_DEBUG)
117#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
118#define _TIF_FREEZE (1 << TIF_FREEZE)
119#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
120#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
121#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
122#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
123
124/* work to do on interrupt/exception return */
125#define _TIF_WORK_MASK \
126 (0x0000FFFF & \
127 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP| \
128 _TIF_SECCOMP|_TIF_SYSCALL_EMU))
129
130/* work to do on any return to user space */
131#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
132
133/* Only used for 64 bit */
134#define _TIF_DO_NOTIFY_MASK \
135 (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
136
137/* flags to check in __switch_to() */
138#define _TIF_WORK_CTXSW \
139 (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS| \
140 _TIF_NOTSC)
141
142#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
143#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
144
145#define PREEMPT_ACTIVE 0x10000000
146
147/* thread information allocation */
148#ifdef CONFIG_DEBUG_STACK_USAGE
149#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
150#else
151#define THREAD_FLAGS GFP_KERNEL
152#endif
153
154#define alloc_thread_info(tsk) \
155 ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
156
157#ifdef CONFIG_X86_32
158
159#define STACK_WARN (THREAD_SIZE/8)
160/*
161 * macros/functions for gaining access to the thread information structure
162 *
163 * preempt_count needs to be 1 initially, until the scheduler is functional.
164 */
165#ifndef __ASSEMBLY__
166
167
168/* how to get the current stack pointer from C */
169register unsigned long current_stack_pointer asm("esp") __used;
170
171/* how to get the thread information struct from C */
172static inline struct thread_info *current_thread_info(void)
173{
174 return (struct thread_info *)
175 (current_stack_pointer & ~(THREAD_SIZE - 1));
176}
177
178#else /* !__ASSEMBLY__ */
179
180/* how to get the thread information struct from ASM */
181#define GET_THREAD_INFO(reg) \
182 movl $-THREAD_SIZE, reg; \
183 andl %esp, reg
184
185/* use this one if reg already contains %esp */
186#define GET_THREAD_INFO_WITH_ESP(reg) \
187 andl $-THREAD_SIZE, reg
188
189#endif
190
191#else /* X86_32 */
192
193#include <asm/pda.h>
194
195/*
196 * macros/functions for gaining access to the thread information structure
197 * preempt_count needs to be 1 initially, until the scheduler is functional.
198 */
199#ifndef __ASSEMBLY__
200static inline struct thread_info *current_thread_info(void)
201{
202 struct thread_info *ti;
203 ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
204 return ti;
205}
206
207/* do not use in interrupt context */
208static inline struct thread_info *stack_thread_info(void)
209{
210 struct thread_info *ti;
211 asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
212 return ti;
213}
214
215#else /* !__ASSEMBLY__ */
216
217/* how to get the thread information struct from ASM */
218#define GET_THREAD_INFO(reg) \
219 movq %gs:pda_kernelstack,reg ; \
220 subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
221
222#endif
223
224#endif /* !X86_32 */
225
226/*
227 * Thread-synchronous status.
228 *
229 * This is different from the flags in that nobody else
230 * ever touches our thread-synchronous status, so we don't
231 * have to worry about atomic accesses.
232 */
233#define TS_USEDFPU 0x0001 /* FPU was used by this task
234 this quantum (SMP) */
235#define TS_COMPAT 0x0002 /* 32bit syscall active (64BIT)*/
236#define TS_POLLING 0x0004 /* true if in idle loop
237 and not sleeping */
238#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */
239
240#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
241
242#ifndef __ASSEMBLY__
243#define HAVE_SET_RESTORE_SIGMASK 1
244static inline void set_restore_sigmask(void)
245{
246 struct thread_info *ti = current_thread_info();
247 ti->status |= TS_RESTORE_SIGMASK;
248 set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
249}
250#endif /* !__ASSEMBLY__ */
7 251
8#ifndef __ASSEMBLY__ 252#ifndef __ASSEMBLY__
9extern void arch_task_cache_init(void); 253extern void arch_task_cache_init(void);
diff --git a/include/asm-x86/thread_info_32.h b/include/asm-x86/thread_info_32.h
deleted file mode 100644
index b6338829d1a8..000000000000
--- a/include/asm-x86/thread_info_32.h
+++ /dev/null
@@ -1,205 +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_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_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
154#define _TIF_DEBUG (1 << TIF_DEBUG)
155#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
156#define _TIF_FREEZE (1 << TIF_FREEZE)
157#define _TIF_NOTSC (1 << TIF_NOTSC)
158#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
159#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
160#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
161#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
162
163/* work to do on interrupt/exception return */
164#define _TIF_WORK_MASK \
165 (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
166 _TIF_SECCOMP | _TIF_SYSCALL_EMU))
167/* work to do on any return to u-space */
168#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
169
170/* flags to check in __switch_to() */
171#define _TIF_WORK_CTXSW \
172 (_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
173 _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
174#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
175#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
176
177
178/*
179 * Thread-synchronous status.
180 *
181 * This is different from the flags in that nobody else
182 * ever touches our thread-synchronous status, so we don't
183 * have to worry about atomic accesses.
184 */
185#define TS_USEDFPU 0x0001 /* FPU was used by this task
186 this quantum (SMP) */
187#define TS_POLLING 0x0002 /* True if in idle loop
188 and not sleeping */
189#define TS_RESTORE_SIGMASK 0x0004 /* restore signal mask in do_signal() */
190
191#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
192
193#ifndef __ASSEMBLY__
194#define HAVE_SET_RESTORE_SIGMASK 1
195static inline void set_restore_sigmask(void)
196{
197 struct thread_info *ti = current_thread_info();
198 ti->status |= TS_RESTORE_SIGMASK;
199 set_bit(TIF_SIGPENDING, &ti->flags);
200}
201#endif /* !__ASSEMBLY__ */
202
203#endif /* __KERNEL__ */
204
205#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 cb69f70abba1..000000000000
--- a/include/asm-x86/thread_info_64.h
+++ /dev/null
@@ -1,195 +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_MCE_NOTIFY 10 /* notify userspace of an MCE */
113#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
114/* 16 free */
115#define TIF_IA32 17 /* 32bit process */
116#define TIF_FORK 18 /* ret_from_fork */
117#define TIF_ABI_PENDING 19
118#define TIF_MEMDIE 20
119#define TIF_DEBUG 21 /* uses debug registers */
120#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
121#define TIF_FREEZE 23 /* is freezing for suspend */
122#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
123#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
124#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
125#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
126#define TIF_NOTSC 28 /* TSC is not accessible in userland */
127
128#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
129#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
130#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
131#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
132#define _TIF_IRET (1 << TIF_IRET)
133#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
134#define _TIF_SECCOMP (1 << TIF_SECCOMP)
135#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
136#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
137#define _TIF_IA32 (1 << TIF_IA32)
138#define _TIF_FORK (1 << TIF_FORK)
139#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
140#define _TIF_DEBUG (1 << TIF_DEBUG)
141#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
142#define _TIF_FREEZE (1 << TIF_FREEZE)
143#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
144#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
145#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
146#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
147#define _TIF_NOTSC (1 << TIF_NOTSC)
148
149/* work to do on interrupt/exception return */
150#define _TIF_WORK_MASK \
151 (0x0000FFFF & \
152 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
153/* work to do on any return to user space */
154#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
155
156#define _TIF_DO_NOTIFY_MASK \
157 (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
158
159/* flags to check in __switch_to() */
160#define _TIF_WORK_CTXSW \
161 (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
162#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
163#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
164
165#define PREEMPT_ACTIVE 0x10000000
166
167/*
168 * Thread-synchronous status.
169 *
170 * This is different from the flags in that nobody else
171 * ever touches our thread-synchronous status, so we don't
172 * have to worry about atomic accesses.
173 */
174#define TS_USEDFPU 0x0001 /* FPU was used by this task
175 this quantum (SMP) */
176#define TS_COMPAT 0x0002 /* 32bit syscall active */
177#define TS_POLLING 0x0004 /* true if in idle loop
178 and not sleeping */
179#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */
180
181#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
182
183#ifndef __ASSEMBLY__
184#define HAVE_SET_RESTORE_SIGMASK 1
185static inline void set_restore_sigmask(void)
186{
187 struct thread_info *ti = current_thread_info();
188 ti->status |= TS_RESTORE_SIGMASK;
189 set_bit(TIF_SIGPENDING, &ti->flags);
190}
191#endif /* !__ASSEMBLY__ */
192
193#endif /* __KERNEL__ */
194
195#endif /* _ASM_THREAD_INFO_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 22:20:13 -0500