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 (3842B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2006 Atmark Techno, Inc.
      4 */
      5
      6#ifndef _ASM_MICROBLAZE_THREAD_INFO_H
      7#define _ASM_MICROBLAZE_THREAD_INFO_H
      8
      9#ifdef __KERNEL__
     10
     11/* we have 8k stack */
     12#define THREAD_SHIFT		13
     13#define THREAD_SIZE		(1 << THREAD_SHIFT)
     14#define THREAD_SIZE_ORDER	1
     15
     16#ifndef __ASSEMBLY__
     17# include <linux/types.h>
     18# include <asm/processor.h>
     19
     20/*
     21 * low level task data that entry.S needs immediate access to
     22 * - this struct should fit entirely inside of one cache line
     23 * - this struct shares the supervisor stack pages
     24 * - if the contents of this structure are changed, the assembly constants
     25 *	 must also be changed
     26 */
     27
     28struct cpu_context {
     29	__u32	r1; /* stack pointer */
     30	__u32	r2;
     31	/* dedicated registers */
     32	__u32	r13;
     33	__u32	r14;
     34	__u32	r15;
     35	__u32	r16;
     36	__u32	r17;
     37	__u32	r18;
     38	/* non-volatile registers */
     39	__u32	r19;
     40	__u32	r20;
     41	__u32	r21;
     42	__u32	r22;
     43	__u32	r23;
     44	__u32	r24;
     45	__u32	r25;
     46	__u32	r26;
     47	__u32	r27;
     48	__u32	r28;
     49	__u32	r29;
     50	__u32	r30;
     51	/* r31 is used as current task pointer */
     52	/* special purpose registers */
     53	__u32	msr;
     54	__u32	ear;
     55	__u32	esr;
     56	__u32	fsr;
     57};
     58
     59struct thread_info {
     60	struct task_struct	*task; /* main task structure */
     61	unsigned long		flags; /* low level flags */
     62	unsigned long		status; /* thread-synchronous flags */
     63	__u32			cpu; /* current CPU */
     64	__s32			preempt_count; /* 0 => preemptable,< 0 => BUG*/
     65
     66	struct cpu_context	cpu_context;
     67};
     68
     69/*
     70 * macros/functions for gaining access to the thread information structure
     71 */
     72#define INIT_THREAD_INFO(tsk)			\
     73{						\
     74	.task		= &tsk,			\
     75	.flags		= 0,			\
     76	.cpu		= 0,			\
     77	.preempt_count	= INIT_PREEMPT_COUNT,	\
     78}
     79
     80/* how to get the thread information struct from C */
     81static inline struct thread_info *current_thread_info(void)
     82{
     83	register unsigned long sp asm("r1");
     84
     85	return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
     86}
     87
     88/* thread information allocation */
     89#endif /* __ASSEMBLY__ */
     90
     91/*
     92 * thread information flags
     93 * - these are process state flags that various assembly files may
     94 *   need to access
     95 * - pending work-to-be-done flags are in LSW
     96 * - other flags in MSW
     97 */
     98#define TIF_SYSCALL_TRACE	0 /* syscall trace active */
     99#define TIF_NOTIFY_RESUME	1 /* resumption notification requested */
    100#define TIF_SIGPENDING		2 /* signal pending */
    101#define TIF_NEED_RESCHED	3 /* rescheduling necessary */
    102/* restore singlestep on return to user mode */
    103#define TIF_SINGLESTEP		4
    104#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */
    105#define TIF_MEMDIE		6	/* is terminating due to OOM killer */
    106#define TIF_SYSCALL_AUDIT	9       /* syscall auditing active */
    107#define TIF_SECCOMP		10      /* secure computing */
    108
    109/* true if poll_idle() is polling TIF_NEED_RESCHED */
    110#define TIF_POLLING_NRFLAG	16
    111
    112#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
    113#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
    114#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
    115#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
    116#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
    117#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
    118#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
    119#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
    120#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
    121
    122/* work to do in syscall trace */
    123#define _TIF_WORK_SYSCALL_MASK  (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
    124				 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
    125
    126/* work to do on interrupt/exception return */
    127#define _TIF_WORK_MASK		0x0000FFFE
    128
    129/* work to do on any return to u-space */
    130#define _TIF_ALLWORK_MASK	0x0000FFFF
    131
    132/*
    133 * Thread-synchronous status.
    134 *
    135 * This is different from the flags in that nobody else
    136 * ever touches our thread-synchronous status, so we don't
    137 * have to worry about atomic accesses.
    138 */
    139/* FPU was used by this task this quantum (SMP) */
    140#define TS_USEDFPU		0x0001
    141
    142#endif /* __KERNEL__ */
    143#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */