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Linux/arch/arm64/include/asm/thread_info.h

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  1 /*
  2  * Based on arch/arm/include/asm/thread_info.h
  3  *
  4  * Copyright (C) 2002 Russell King.
  5  * Copyright (C) 2012 ARM Ltd.
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 as
  9  * published by the Free Software Foundation.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 18  */
 19 #ifndef __ASM_THREAD_INFO_H
 20 #define __ASM_THREAD_INFO_H
 21 
 22 #ifdef __KERNEL__
 23 
 24 #include <linux/compiler.h>
 25 
 26 #ifndef __ASSEMBLY__
 27 
 28 struct task_struct;
 29 
 30 #include <asm/memory.h>
 31 #include <asm/stack_pointer.h>
 32 #include <asm/types.h>
 33 
 34 typedef unsigned long mm_segment_t;
 35 
 36 /*
 37  * low level task data that entry.S needs immediate access to.
 38  */
 39 struct thread_info {
 40         unsigned long           flags;          /* low level flags */
 41         mm_segment_t            addr_limit;     /* address limit */
 42 #ifdef CONFIG_ARM64_SW_TTBR0_PAN
 43         u64                     ttbr0;          /* saved TTBR0_EL1 */
 44 #endif
 45         int                     preempt_count;  /* 0 => preemptable, <0 => bug */
 46 };
 47 
 48 #define INIT_THREAD_INFO(tsk)                                           \
 49 {                                                                       \
 50         .preempt_count  = INIT_PREEMPT_COUNT,                           \
 51         .addr_limit     = KERNEL_DS,                                    \
 52 }
 53 
 54 #define thread_saved_pc(tsk)    \
 55         ((unsigned long)(tsk->thread.cpu_context.pc))
 56 #define thread_saved_sp(tsk)    \
 57         ((unsigned long)(tsk->thread.cpu_context.sp))
 58 #define thread_saved_fp(tsk)    \
 59         ((unsigned long)(tsk->thread.cpu_context.fp))
 60 
 61 void arch_setup_new_exec(void);
 62 #define arch_setup_new_exec     arch_setup_new_exec
 63 
 64 void arch_release_task_struct(struct task_struct *tsk);
 65 
 66 #endif
 67 
 68 /*
 69  * thread information flags:
 70  *  TIF_SYSCALL_TRACE   - syscall trace active
 71  *  TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace
 72  *  TIF_SYSCALL_AUDIT   - syscall auditing
 73  *  TIF_SECOMP          - syscall secure computing
 74  *  TIF_SIGPENDING      - signal pending
 75  *  TIF_NEED_RESCHED    - rescheduling necessary
 76  *  TIF_NOTIFY_RESUME   - callback before returning to user
 77  *  TIF_USEDFPU         - FPU was used by this task this quantum (SMP)
 78  */
 79 #define TIF_SIGPENDING          0
 80 #define TIF_NEED_RESCHED        1
 81 #define TIF_NOTIFY_RESUME       2       /* callback before returning to user */
 82 #define TIF_FOREIGN_FPSTATE     3       /* CPU's FP state is not current's */
 83 #define TIF_UPROBE              4       /* uprobe breakpoint or singlestep */
 84 #define TIF_FSCHECK             5       /* Check FS is USER_DS on return */
 85 #define TIF_NOHZ                7
 86 #define TIF_SYSCALL_TRACE       8
 87 #define TIF_SYSCALL_AUDIT       9
 88 #define TIF_SYSCALL_TRACEPOINT  10
 89 #define TIF_SECCOMP             11
 90 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
 91 #define TIF_FREEZE              19
 92 #define TIF_RESTORE_SIGMASK     20
 93 #define TIF_SINGLESTEP          21
 94 #define TIF_32BIT               22      /* 32bit process */
 95 #define TIF_SVE                 23      /* Scalable Vector Extension in use */
 96 #define TIF_SVE_VL_INHERIT      24      /* Inherit sve_vl_onexec across exec */
 97 
 98 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 99 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
100 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
101 #define _TIF_FOREIGN_FPSTATE    (1 << TIF_FOREIGN_FPSTATE)
102 #define _TIF_NOHZ               (1 << TIF_NOHZ)
103 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
104 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
105 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
106 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
107 #define _TIF_UPROBE             (1 << TIF_UPROBE)
108 #define _TIF_FSCHECK            (1 << TIF_FSCHECK)
109 #define _TIF_32BIT              (1 << TIF_32BIT)
110 #define _TIF_SVE                (1 << TIF_SVE)
111 
112 #define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
113                                  _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
114                                  _TIF_UPROBE | _TIF_FSCHECK)
115 
116 #define _TIF_SYSCALL_WORK       (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
117                                  _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
118                                  _TIF_NOHZ)
119 
120 #endif /* __KERNEL__ */
121 #endif /* __ASM_THREAD_INFO_H */
122 

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