cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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thread_info.h (3344B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Thread support for the Hexagon architecture
      4 *
      5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
      6 */
      7
      8#ifndef _ASM_THREAD_INFO_H
      9#define _ASM_THREAD_INFO_H
     10
     11#ifdef __KERNEL__
     12
     13#ifndef __ASSEMBLY__
     14#include <asm/processor.h>
     15#include <asm/registers.h>
     16#include <asm/page.h>
     17#endif
     18
     19#define THREAD_SHIFT		12
     20#define THREAD_SIZE		(1<<THREAD_SHIFT)
     21#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)
     22
     23#ifndef __ASSEMBLY__
     24
     25/*
     26 * This is union'd with the "bottom" of the kernel stack.
     27 * It keeps track of thread info which is handy for routines
     28 * to access quickly.
     29 */
     30
     31struct thread_info {
     32	struct task_struct	*task;		/* main task structure */
     33	unsigned long		flags;          /* low level flags */
     34	__u32                   cpu;            /* current cpu */
     35	int                     preempt_count;  /* 0=>preemptible,<0=>BUG */
     36	/*
     37	 * used for syscalls somehow;
     38	 * seems to have a function pointer and four arguments
     39	 */
     40	/* Points to the current pt_regs frame  */
     41	struct pt_regs		*regs;
     42	/*
     43	 * saved kernel sp at switch_to time;
     44	 * not sure if this is used (it's not in the VM model it seems;
     45	 * see thread_struct)
     46	 */
     47	unsigned long		sp;
     48};
     49
     50#else /* !__ASSEMBLY__ */
     51
     52#include <asm/asm-offsets.h>
     53
     54#endif  /* __ASSEMBLY__  */
     55
     56#ifndef __ASSEMBLY__
     57
     58#define INIT_THREAD_INFO(tsk)                   \
     59{                                               \
     60	.task           = &tsk,                 \
     61	.flags          = 0,                    \
     62	.cpu            = 0,                    \
     63	.preempt_count  = 1,                    \
     64	.sp = 0,				\
     65	.regs = NULL,			\
     66}
     67
     68/* Tacky preprocessor trickery */
     69#define	qqstr(s) qstr(s)
     70#define qstr(s) #s
     71#define QUOTED_THREADINFO_REG qqstr(THREADINFO_REG)
     72
     73register struct thread_info *__current_thread_info asm(QUOTED_THREADINFO_REG);
     74#define current_thread_info()  __current_thread_info
     75
     76#endif /* __ASSEMBLY__ */
     77
     78/*
     79 * thread information flags
     80 * - these are process state flags that various assembly files
     81 *   may need to access
     82 * - pending work-to-be-done flags are in LSW
     83 * - other flags in MSW
     84 */
     85
     86#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
     87#define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
     88#define TIF_SIGPENDING          2       /* signal pending */
     89#define TIF_NEED_RESCHED        3       /* rescheduling necessary */
     90#define TIF_SINGLESTEP          4       /* restore ss @ return to usr mode */
     91#define TIF_RESTORE_SIGMASK     6       /* restore sig mask in do_signal() */
     92#define TIF_NOTIFY_SIGNAL	7       /* signal notifications exist */
     93/* true if poll_idle() is polling TIF_NEED_RESCHED */
     94#define TIF_MEMDIE              17      /* OOM killer killed process */
     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_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
    100#define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
    101#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
    102
    103/* work to do on interrupt/exception return - All but TIF_SYSCALL_TRACE */
    104#define _TIF_WORK_MASK          (0x0000FFFF & ~_TIF_SYSCALL_TRACE)
    105
    106/* work to do on any return to u-space */
    107#define _TIF_ALLWORK_MASK       0x0000FFFF
    108
    109#endif /* __KERNEL__ */
    110
    111#endif