diff options
Diffstat (limited to 'arch/arm64/kernel/entry-common.c')
| -rw-r--r-- | arch/arm64/kernel/entry-common.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 0fc94207e69a..3c849ad03bf8 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -10,6 +10,7 @@ #include <linux/linkage.h> #include <linux/lockdep.h> #include <linux/ptrace.h> +#include <linux/resume_user_mode.h> #include <linux/sched.h> #include <linux/sched/debug.h> #include <linux/thread_info.h> @@ -126,6 +127,37 @@ static __always_inline void __exit_to_user_mode(void) lockdep_hardirqs_on(CALLER_ADDR0); } +static void do_notify_resume(struct pt_regs *regs, unsigned long thread_flags) +{ + do { + local_daif_restore(DAIF_PROCCTX); + + if (thread_flags & _TIF_NEED_RESCHED) + schedule(); + + if (thread_flags & _TIF_UPROBE) + uprobe_notify_resume(regs); + + if (thread_flags & _TIF_MTE_ASYNC_FAULT) { + clear_thread_flag(TIF_MTE_ASYNC_FAULT); + send_sig_fault(SIGSEGV, SEGV_MTEAERR, + (void __user *)NULL, current); + } + + if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) + do_signal(regs); + + if (thread_flags & _TIF_NOTIFY_RESUME) + resume_user_mode_work(regs); + + if (thread_flags & _TIF_FOREIGN_FPSTATE) + fpsimd_restore_current_state(); + + local_daif_mask(); + thread_flags = read_thread_flags(); + } while (thread_flags & _TIF_WORK_MASK); +} + static __always_inline void exit_to_user_mode_prepare(struct pt_regs *regs) { unsigned long flags; |