/*
* This routine is called on return from interrupt if any of the
* TIF_WORK_MASK flags are set in thread_info->flags. It is
* entered with interrupts disabled so we don't miss an event
* that modified the thread_info flags. If any flag is set, we
* handle it and return, and the calling assembly code will
* re-disable interrupts, reload the thread flags, and call back
* if more flags need to be handled.
*
* We return whether we need to check the thread_info flags again
* or not. Note that we don't clear TIF_SINGLESTEP here, so it's
* important that it be tested last, and then claim that we don't
* need to recheck the flags.
*/
int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
{
if (thread_info_flags & _TIF_NEED_RESCHED) {
schedule();
return 1;
}
#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
if (thread_info_flags & _TIF_ASYNC_TLB) {
do_async_page_fault(regs);
return 1;
}
#endif
if (thread_info_flags & _TIF_SIGPENDING) {
do_signal(regs);
return 1;
}
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
if (current->replacement_session_keyring)
key_replace_session_keyring();
return 1;
}
if (thread_info_flags & _TIF_SINGLESTEP) {
if ((regs->ex1 & SPR_EX_CONTEXT_1_1__PL_MASK) == 0)
single_step_once(regs);
return 0;
}
panic("work_pending: bad flags %#x\n", thread_info_flags);
}
/*
* This routine is called on return from interrupt if any of the
* TIF_WORK_MASK flags are set in thread_info->flags. It is
* entered with interrupts disabled so we don't miss an event
* that modified the thread_info flags. If any flag is set, we
* handle it and return, and the calling assembly code will
* re-disable interrupts, reload the thread flags, and call back
* if more flags need to be handled.
*
* We return whether we need to check the thread_info flags again
* or not. Note that we don't clear TIF_SINGLESTEP here, so it's
* important that it be tested last, and then claim that we don't
* need to recheck the flags.
*/
int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
{
/* If we enter in kernel mode, do nothing and exit the caller loop. */
if (!user_mode(regs))
return 0;
if (thread_info_flags & _TIF_NEED_RESCHED) {
schedule();
return 1;
}
#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
if (thread_info_flags & _TIF_ASYNC_TLB) {
do_async_page_fault(regs);
return 1;
}
#endif
if (thread_info_flags & _TIF_SIGPENDING) {
do_signal(regs);
return 1;
}
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
if (current->replacement_session_keyring)
key_replace_session_keyring();
return 1;
}
if (thread_info_flags & _TIF_SINGLESTEP) {
single_step_once(regs);
return 0;
}
panic("work_pending: bad flags %#x\n", thread_info_flags);
}
