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| author | AKASHI Takahiro | 2014-04-30 11:54:36 +0200 |
|---|---|---|
| committer | Will Deacon | 2014-05-29 10:08:33 +0200 |
| commit | 055b1212d141f1f398fca548f8147787c0b6253f (patch) | |
| tree | a2baa3bd73b450008056bf69edf708e7902736b5 /arch/arm64/Kconfig | |
| parent | arm64: ftrace: Add CALLER_ADDRx macros (diff) | |
| download | kernel-qcow2-linux-055b1212d141f1f398fca548f8147787c0b6253f.tar.gz kernel-qcow2-linux-055b1212d141f1f398fca548f8147787c0b6253f.tar.xz kernel-qcow2-linux-055b1212d141f1f398fca548f8147787c0b6253f.zip | |
arm64: ftrace: Add system call tracepoint
This patch allows system call entry or exit to be traced as ftrace events,
ie. sys_enter_*/sys_exit_*, if CONFIG_FTRACE_SYSCALLS is enabled.
Those events appear and can be controlled under
${sysfs}/tracing/events/syscalls/
Please note that we can't trace compat system calls here because
AArch32 mode does not share the same syscall table with AArch64.
Just define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS in order to avoid unexpected
results (bogus syscalls reported or even hang-up).
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4e689ad5f27c..bceeaf10c9d6 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -48,6 +48,7 @@ config ARM64 select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM |