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Date: Sun, 27 Apr 2014 12:44:13 -0700 From: Larry Bassel <larry.bassel@...aro.org> To: catalin.marinas@....com, will.deacon@....com Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linaro-kernel@...ts.linaro.org, khilman@...aro.org, Larry Bassel <larry.bassel@...aro.org> Subject: [PATCH 2/3] arm64: add support for context tracking From: Kevin Hilman <khilman@...aro.org> Add the macros and defines needed to implement context tracking on arm64. Signed-off-by: Kevin Hilman <khilman@...aro.org> Signed-off-by: Larry Bassel <larry.bassel@...aro.org> --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/thread_info.h | 1 + arch/arm64/kernel/entry.S | 16 ++++++++++++++++ 3 files changed, 18 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e6e4d37..152d92b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -55,6 +55,7 @@ config ARM64 select RTC_LIB select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE + select HAVE_CONTEXT_TRACKING help ARM 64-bit (AArch64) Linux support. diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 720e70b..301ea6a 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -108,6 +108,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SINGLESTEP 21 #define TIF_32BIT 22 /* 32bit process */ #define TIF_SWITCH_MM 23 /* deferred switch_mm */ +#define TIF_NOHZ 24 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index eda7755..76b09d8 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -30,6 +30,22 @@ #include <asm/unistd32.h> /* + * Context tracking subsystem. Used to instrument transitions + * between user and kernel mode. + */ + .macro ct_user_exit +#ifdef CONFIG_CONTEXT_TRACKING + bl context_tracking_user_exit +#endif + .endm + + .macro ct_user_enter +#ifdef CONFIG_CONTEXT_TRACKING + bl context_tracking_user_enter +#endif + .endm + +/* * Bad Abort numbers *----------------- */ -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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