diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2022-02-09 12:20:45 -0600 |
---|---|---|
committer | Eric W. Biederman <ebiederm@xmission.com> | 2022-03-10 16:51:50 -0600 |
commit | 03248addadf1a5ef0a03cbcd5ec905b49adb9658 (patch) | |
tree | ed830a987bf8cccf7e07883ea1f68259023b1d57 | |
parent | d3c51a0c8944e3a5bba458358b4c1f9ae2de0133 (diff) | |
download | linux-03248addadf1a5ef0a03cbcd5ec905b49adb9658.tar.bz2 |
resume_user_mode: Move to resume_user_mode.h
Move set_notify_resume and tracehook_notify_resume into resume_user_mode.h.
While doing that rename tracehook_notify_resume to resume_user_mode_work.
Update all of the places that included tracehook.h for these functions to
include resume_user_mode.h instead.
Update all of the callers of tracehook_notify_resume to call
resume_user_mode_work.
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20220309162454.123006-12-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
35 files changed, 117 insertions, 107 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 6382520ef0a5..2e3979c3d66d 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -218,7 +218,7 @@ config TRACE_IRQFLAGS_SUPPORT # linux/regset.h user_regset interfaces # CORE_DUMP_USE_REGSET #define'd in linux/elf.h # TIF_SYSCALL_TRACE calls ptrace_report_syscall_{entry,exit} -# TIF_NOTIFY_RESUME calls tracehook_notify_resume() +# TIF_NOTIFY_RESUME calls resume_user_mode_work() # config HAVE_ARCH_TRACEHOOK bool diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c index d8ed71d5bed3..6f47f256fe80 100644 --- a/arch/alpha/kernel/signal.c +++ b/arch/alpha/kernel/signal.c @@ -22,7 +22,7 @@ #include <linux/binfmts.h> #include <linux/bitops.h> #include <linux/syscalls.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/uaccess.h> #include <asm/sigcontext.h> @@ -531,7 +531,7 @@ do_work_pending(struct pt_regs *regs, unsigned long thread_flags, do_signal(regs, r0, r19); r0 = 0; } else { - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } } local_irq_disable(); diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c index cb2f88502baf..f748483628f2 100644 --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -49,7 +49,7 @@ #include <linux/personality.h> #include <linux/uaccess.h> #include <linux/syscalls.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/sched/task_stack.h> #include <asm/ucontext.h> @@ -438,5 +438,5 @@ void do_notify_resume(struct pt_regs *regs) * user mode */ if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index c532a6041066..459abc5d1819 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -9,7 +9,7 @@ #include <linux/signal.h> #include <linux/personality.h> #include <linux/uaccess.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/uprobes.h> #include <linux/syscalls.h> @@ -627,7 +627,7 @@ do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall) } else if (thread_flags & _TIF_UPROBE) { uprobe_notify_resume(regs); } else { - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } } local_irq_disable(); diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index d8aaf4b6f432..413c51de9d10 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -17,7 +17,7 @@ #include <linux/uaccess.h> #include <linux/sizes.h> #include <linux/string.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/ratelimit.h> #include <linux/syscalls.h> @@ -941,7 +941,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_flags) do_signal(regs); if (thread_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); if (thread_flags & _TIF_FOREIGN_FPSTATE) fpsimd_restore_current_state(); diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c index c7b763d2f526..7a3149a27e4d 100644 --- a/arch/csky/kernel/signal.c +++ b/arch/csky/kernel/signal.c @@ -3,7 +3,7 @@ #include <linux/signal.h> #include <linux/uaccess.h> #include <linux/syscalls.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/traps.h> #include <asm/ucontext.h> @@ -265,5 +265,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c index 75a1c36b105a..0716fc8a8ce2 100644 --- a/arch/h8300/kernel/signal.c +++ b/arch/h8300/kernel/signal.c @@ -39,7 +39,7 @@ #include <linux/personality.h> #include <linux/tty.h> #include <linux/binfmts.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/setup.h> #include <linux/uaccess.h> @@ -283,5 +283,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags) do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c index 232dfd8956aa..ae3f728eeca0 100644 --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -14,7 +14,7 @@ #include <linux/tick.h> #include <linux/uaccess.h> #include <linux/slab.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> /* * Program thread launch. Often defined as a macro in processor.h, @@ -178,7 +178,7 @@ int do_work_pending(struct pt_regs *regs, u32 thread_info_flags) } if (thread_info_flags & _TIF_NOTIFY_RESUME) { - tracehook_notify_resume(regs); + resume_user_mode_work(regs); return 1; } diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c index 94cc7ff52dce..bcba31e9e0ae 100644 --- a/arch/hexagon/kernel/signal.c +++ b/arch/hexagon/kernel/signal.c @@ -7,7 +7,6 @@ #include <linux/linkage.h> #include <linux/syscalls.h> -#include <linux/tracehook.h> #include <linux/sched/task_stack.h> #include <asm/registers.h> diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index 834df24a88f1..d7a256bd9d6b 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -32,7 +32,7 @@ #include <linux/delay.h> #include <linux/kdebug.h> #include <linux/utsname.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/rcupdate.h> #include <asm/cpu.h> @@ -179,7 +179,7 @@ do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall) if (test_thread_flag(TIF_NOTIFY_RESUME)) { local_irq_enable(); /* force interrupt enable */ - tracehook_notify_resume(&scr->pt); + resume_user_mode_work(&scr->pt); } /* copy user rbs to kernel rbs */ diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c index 6af64aae087d..a19acd9f5e1f 100644 --- a/arch/ia64/kernel/ptrace.c +++ b/arch/ia64/kernel/ptrace.c @@ -23,7 +23,7 @@ #include <linux/signal.h> #include <linux/regset.h> #include <linux/elf.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/processor.h> #include <asm/ptrace_offsets.h> diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c index c1b299760bf7..51cf6a7ec158 100644 --- a/arch/ia64/kernel/signal.c +++ b/arch/ia64/kernel/signal.c @@ -12,7 +12,6 @@ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/ptrace.h> -#include <linux/tracehook.h> #include <linux/sched.h> #include <linux/signal.h> #include <linux/smp.h> diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index 338817d0cb3f..49533f65958a 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -43,7 +43,7 @@ #include <linux/tty.h> #include <linux/binfmts.h> #include <linux/extable.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/setup.h> #include <linux/uaccess.h> @@ -1109,5 +1109,5 @@ void do_notify_resume(struct pt_regs *regs) do_signal(regs); if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c index 23e8a9336a29..561eb82d7af6 100644 --- a/arch/microblaze/kernel/signal.c +++ b/arch/microblaze/kernel/signal.c @@ -31,7 +31,7 @@ #include <linux/personality.h> #include <linux/percpu.h> #include <linux/linkage.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/entry.h> #include <asm/ucontext.h> #include <linux/uaccess.h> @@ -311,5 +311,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall) do_signal(regs, in_syscall); if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index 5bce782e694c..1a99f26bf99f 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -25,7 +25,7 @@ #include <linux/compiler.h> #include <linux/syscalls.h> #include <linux/uaccess.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/abi.h> #include <asm/asm.h> @@ -916,7 +916,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused, do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); user_enter(); } diff --git a/arch/nds32/kernel/signal.c b/arch/nds32/kernel/signal.c index 7e3ca430a223..551caef595cb 100644 --- a/arch/nds32/kernel/signal.c +++ b/arch/nds32/kernel/signal.c @@ -6,7 +6,7 @@ #include <linux/ptrace.h> #include <linux/personality.h> #include <linux/freezer.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/uaccess.h> #include <asm/cacheflush.h> @@ -380,5 +380,5 @@ do_notify_resume(struct pt_regs *regs, unsigned int thread_flags) do_signal(regs); if (thread_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c index 2009ae2d3c3b..530b60c99545 100644 --- a/arch/nios2/kernel/signal.c +++ b/arch/nios2/kernel/signal.c @@ -15,7 +15,7 @@ #include <linux/uaccess.h> #include <linux/unistd.h> #include <linux/personality.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/ucontext.h> #include <asm/cacheflush.h> @@ -319,7 +319,7 @@ asmlinkage int do_notify_resume(struct pt_regs *regs) return restart; } } else if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); return 0; } diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c index 92c5b70740f5..80f69740c731 100644 --- a/arch/openrisc/kernel/signal.c +++ b/arch/openrisc/kernel/signal.c @@ -21,7 +21,7 @@ #include <linux/ptrace.h> #include <linux/unistd.h> #include <linux/stddef.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/processor.h> #include <asm/syscall.h> @@ -309,7 +309,7 @@ do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall) } syscall = 0; } else { - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } } local_irq_disable(); diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c index 46b1050640b8..2f7ebe9add20 100644 --- a/arch/parisc/kernel/signal.c +++ b/arch/parisc/kernel/signal.c @@ -22,7 +22,7 @@ #include <linux/errno.h> #include <linux/wait.h> #include <linux/ptrace.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/unistd.h> #include <linux/stddef.h> #include <linux/compat.h> @@ -602,5 +602,5 @@ void do_notify_resume(struct pt_regs *regs, long in_syscall) do_signal(regs, in_syscall); if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index b93b87df499d..f7f8620663c7 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -9,7 +9,7 @@ * this archive for more details. */ -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/signal.h> #include <linux/uprobes.h> #include <linux/key.h> @@ -294,7 +294,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) } if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } static unsigned long get_tm_stackpointer(struct task_struct *tsk) diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c index c2d5ecbe5526..d80bf5896c6f 100644 --- a/arch/riscv/kernel/signal.c +++ b/arch/riscv/kernel/signal.c @@ -9,7 +9,7 @@ #include <linux/signal.h> #include <linux/uaccess.h> #include <linux/syscalls.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/linkage.h> #include <asm/ucontext.h> @@ -317,5 +317,5 @@ asmlinkage __visible void do_notify_resume(struct pt_regs *regs, do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index dd3092911efa..90f495d35db2 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -25,7 +25,7 @@ #include <linux/personality.h> #include <linux/binfmts.h> #include <linux/io.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/ucontext.h> #include <linux/uaccess.h> #include <asm/cacheflush.h> @@ -503,5 +503,5 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0, do_signal(regs, save_r0); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c index 6cc124a3bb98..f9fe502b81c6 100644 --- a/arch/sparc/kernel/signal32.c +++ b/arch/sparc/kernel/signal32.c @@ -20,7 +20,6 @@ #include <linux/binfmts.h> #include <linux/compat.h> #include <linux/bitops.h> -#include <linux/tracehook.h> #include <linux/uaccess.h> #include <asm/ptrace.h> diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c index ffab16369bea..80c89b362d8b 100644 --- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -19,7 +19,7 @@ #include <linux/smp.h> #include <linux/binfmts.h> /* do_coredum */ #include <linux/bitops.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/uaccess.h> #include <asm/ptrace.h> @@ -524,7 +524,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) do_signal(regs, orig_i0); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } asmlinkage int do_sys_sigstack(struct sigstack __user *ssptr, diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c index 2a78d2af1265..8b9fc76cd3e0 100644 --- a/arch/sparc/kernel/signal_64.c +++ b/arch/sparc/kernel/signal_64.c @@ -15,7 +15,7 @@ #include <linux/errno.h> #include <linux/wait.h> #include <linux/ptrace.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/unistd.h> #include <linux/mm.h> #include <linux/tty.h> @@ -552,7 +552,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) do_signal(regs, orig_i0); if (thread_info_flags & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); user_enter(); } diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 4a420778ed87..80504680be08 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -23,7 +23,7 @@ #include <linux/seq_file.h> #include <linux/tick.h> #include <linux/threads.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <asm/current.h> #include <asm/mmu_context.h> #include <linux/uaccess.h> @@ -104,7 +104,7 @@ void interrupt_end(void) test_thread_flag(TIF_NOTIFY_SIGNAL)) do_signal(regs); if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } int get_current_pid(void) diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c index f6c949895b3e..6f68649e86ba 100644 --- a/arch/xtensa/kernel/signal.c +++ b/arch/xtensa/kernel/signal.c @@ -19,7 +19,7 @@ #include <linux/errno.h> #include <linux/ptrace.h> #include <linux/personality.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/sched/task_stack.h> #include <asm/ucontext.h> @@ -511,5 +511,5 @@ void do_notify_resume(struct pt_regs *regs) do_signal(regs); if (test_thread_flag(TIF_NOTIFY_RESUME)) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); } diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 650f7e27989f..4d8be1634bc6 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -28,7 +28,7 @@ #include <linux/atomic.h> #include <linux/ctype.h> #include <linux/blk-cgroup.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/psi.h> #include <linux/part_stat.h> #include "blk.h" diff --git a/include/linux/entry-kvm.h b/include/linux/entry-kvm.h index 07c878d6e323..6813171afccb 100644 --- a/include/linux/entry-kvm.h +++ b/include/linux/entry-kvm.h @@ -3,7 +3,7 @@ #define __LINUX_ENTRYKVM_H #include <linux/static_call_types.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/syscalls.h> #include <linux/seccomp.h> #include <linux/sched.h> diff --git a/include/linux/resume_user_mode.h b/include/linux/resume_user_mode.h new file mode 100644 index 000000000000..285189454449 --- /dev/null +++ b/include/linux/resume_user_mode.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef LINUX_RESUME_USER_MODE_H +#define LINUX_RESUME_USER_MODE_H + +#include <linux/sched.h> +#include <linux/task_work.h> +#include <linux/memcontrol.h> +#include <linux/blk-cgroup.h> + +/** + * set_notify_resume - cause resume_user_mode_work() to be called + * @task: task that will call resume_user_mode_work() + * + * Calling this arranges that @task will call resume_user_mode_work() + * before returning to user mode. If it's already running in user mode, + * it will enter the kernel and call resume_user_mode_work() soon. + * If it's blocked, it will not be woken. + */ +static inline void set_notify_resume(struct task_struct *task) +{ + if (!test_and_set_tsk_thread_flag(task, TIF_NOTIFY_RESUME)) + kick_process(task); +} + + +/** + * resume_user_mode_work - Perform work before returning to user mode + * @regs: user-mode registers of @current task + * + * This is called when %TIF_NOTIFY_RESUME has been set. Now we are + * about to return to user mode, and the user state in @regs can be + * inspected or adjusted. The caller in arch code has cleared + * %TIF_NOTIFY_RESUME before the call. If the flag gets set again + * asynchronously, this will be called again before we return to + * user mode. + * + * Called without locks. + */ +static inline void resume_user_mode_work(struct pt_regs *regs) +{ + clear_thread_flag(TIF_NOTIFY_RESUME); + /* + * This barrier pairs with task_work_add()->set_notify_resume() after + * hlist_add_head(task->task_works); + */ + smp_mb__after_atomic(); + if (unlikely(task_work_pending(current))) + task_work_run(); + +#ifdef CONFIG_KEYS_REQUEST_CACHE + if (unlikely(current->cached_requested_key)) { + key_put(current->cached_requested_key); + current->cached_requested_key = NULL; + } +#endif + + mem_cgroup_handle_over_high(); + blkcg_maybe_throttle_current(); + + rseq_handle_notify_resume(NULL, regs); +} + +#endif /* LINUX_RESUME_USER_MODE_H */ diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index 946404ebe10b..9f6b3fd1880a 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -52,56 +52,5 @@ struct linux_binprm; -/** - * set_notify_resume - cause tracehook_notify_resume() to be called - * @task: task that will call tracehook_notify_resume() - * - * Calling this arranges that @task will call tracehook_notify_resume() - * before returning to user mode. If it's already running in user mode, - * it will enter the kernel and call tracehook_notify_resume() soon. - * If it's blocked, it will not be woken. - */ -static inline void set_notify_resume(struct task_struct *task) -{ - if (!test_and_set_tsk_thread_flag(task, TIF_NOTIFY_RESUME)) - kick_process(task); -} - -/** - * tracehook_notify_resume - report when about to return to user mode - * @regs: user-mode registers of @current task - * - * This is called when %TIF_NOTIFY_RESUME has been set. Now we are - * about to return to user mode, and the user state in @regs can be - * inspected or adjusted. The caller in arch code has cleared - * %TIF_NOTIFY_RESUME before the call. If the flag gets set again - * asynchronously, this will be called again before we return to - * user mode. - * - * Called without locks. - */ -static inline void tracehook_notify_resume(struct pt_regs *regs) -{ - clear_thread_flag(TIF_NOTIFY_RESUME); - /* - * This barrier pairs with task_work_add()->set_notify_resume() after - * hlist_add_head(task->task_works); - */ - smp_mb__after_atomic(); - if (unlikely(task_work_pending(current))) - task_work_run(); - -#ifdef CONFIG_KEYS_REQUEST_CACHE - if (unlikely(current->cached_requested_key)) { - key_put(current->cached_requested_key); - current->cached_requested_key = NULL; - } -#endif - - mem_cgroup_handle_over_high(); - blkcg_maybe_throttle_current(); - - rseq_handle_notify_resume(NULL, regs); -} #endif /* <linux/tracehook.h> */ diff --git a/kernel/entry/common.c b/kernel/entry/common.c index 79eaf9b4b10d..a86823cad853 100644 --- a/kernel/entry/common.c +++ b/kernel/entry/common.c @@ -2,7 +2,7 @@ #include <linux/context_tracking.h> #include <linux/entry-common.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/highmem.h> #include <linux/livepatch.h> #include <linux/audit.h> @@ -165,7 +165,7 @@ static unsigned long exit_to_user_mode_loop(struct pt_regs *regs, arch_do_signal_or_restart(regs); if (ti_work & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(regs); + resume_user_mode_work(regs); /* Architecture specific TIF work */ arch_exit_to_user_mode_work(regs, ti_work); diff --git a/kernel/entry/kvm.c b/kernel/entry/kvm.c index 3ab5f98988c3..9d09f489b60e 100644 --- a/kernel/entry/kvm.c +++ b/kernel/entry/kvm.c @@ -23,7 +23,7 @@ static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work) schedule(); if (ti_work & _TIF_NOTIFY_RESUME) - tracehook_notify_resume(NULL); + resume_user_mode_work(NULL); ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work); if (ret) diff --git a/kernel/task_work.c b/kernel/task_work.c index cc6fccb0e24d..c59e1a49bc40 100644 --- a/kernel/task_work.c +++ b/kernel/task_work.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/spinlock.h> #include <linux/task_work.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> static struct callback_head work_exited; /* all we need is ->next == NULL */ diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 09d342c7cbd0..2aaa400f34d6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -59,7 +59,7 @@ #include <linux/oom.h> #include <linux/lockdep.h> #include <linux/file.h> -#include <linux/tracehook.h> +#include <linux/resume_user_mode.h> #include <linux/psi.h> #include <linux/seq_buf.h> #include "internal.h" |