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arm64: add support for TIF_NOTIFY_SIGNAL 

Wire up TIF_NOTIFY_SIGNAL handling for arm64.

Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-10-22 20:09:23 -06:00
parent 53855e1258
commit 192caabd4d
2 changed files with 5 additions and 2 deletions
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5
arch/arm64/include/asm/thread_info.h
View File

@ -68,6 +68,7 @@ void arch_release_task_struct(struct task_struct *tsk);
#define TIF_UPROBE 4 /* uprobe breakpoint or singlestep */ #define TIF_UPROBE 4 /* uprobe breakpoint or singlestep */
#define TIF_FSCHECK 5 /* Check FS is USER_DS on return */ #define TIF_FSCHECK 5 /* Check FS is USER_DS on return */
#define TIF_MTE_ASYNC_FAULT 6 /* MTE Asynchronous Tag Check Fault */ #define TIF_MTE_ASYNC_FAULT 6 /* MTE Asynchronous Tag Check Fault */
#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
#define TIF_SYSCALL_TRACE 8 /* syscall trace active */ #define TIF_SYSCALL_TRACE 8 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing */ #define TIF_SYSCALL_AUDIT 9 /* syscall auditing */
#define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */ #define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */
@ -98,10 +99,12 @@ void arch_release_task_struct(struct task_struct *tsk);
#define _TIF_32BIT (1 << TIF_32BIT) #define _TIF_32BIT (1 << TIF_32BIT)
#define _TIF_SVE (1 << TIF_SVE) #define _TIF_SVE (1 << TIF_SVE)
#define _TIF_MTE_ASYNC_FAULT (1 << TIF_MTE_ASYNC_FAULT) #define _TIF_MTE_ASYNC_FAULT (1 << TIF_MTE_ASYNC_FAULT)
#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
_TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
_TIF_UPROBE | _TIF_FSCHECK | _TIF_MTE_ASYNC_FAULT) _TIF_UPROBE | _TIF_FSCHECK | _TIF_MTE_ASYNC_FAULT | \
_TIF_NOTIFY_SIGNAL)
#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \

2
arch/arm64/kernel/signal.c
View File

@ -942,7 +942,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs,
(void __user *)NULL, current); (void __user *)NULL, current);
} }
if (thread_flags & _TIF_SIGPENDING) if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
do_signal(regs); do_signal(regs);
if (thread_flags & _TIF_NOTIFY_RESUME) { if (thread_flags & _TIF_NOTIFY_RESUME) {