From c34bf4be22d64499449d1cfe550b05365d048403 Mon Sep 17 00:00:00 2001 From: Satyajit Desai Date: Mon, 27 Jun 2016 12:39:34 -0700 Subject: coresight: abort coresight tracing on kernel crash Add trace events to control aborting CoreSight trace dynamically based on module parameter. Coresight driver will dump any trace present in the current sink in case we hit a kernel panic, user fault or an undefined instruction. Change-Id: Iee1ccf5cbd7b767753a3115c0570e63fbe2aa8f3 Signed-off-by: Satyajit Desai --- include/linux/coresight.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 903a8e852f5d..66bf56640fe1 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -194,10 +194,12 @@ struct coresight_device { * Operations available for sinks * @enable: enables the sink. * @disable: disables the sink. + * @abort: captures sink trace on abort */ struct coresight_ops_sink { int (*enable)(struct coresight_device *csdev); void (*disable)(struct coresight_device *csdev); + void (*abort)(struct coresight_device *csdev); }; /** @@ -239,6 +241,7 @@ extern int coresight_enable(struct coresight_device *csdev); extern void coresight_disable(struct coresight_device *csdev); extern int coresight_timeout(void __iomem *addr, u32 offset, int position, int value); +extern void coresight_abort(void); #else static inline struct coresight_device * coresight_register(struct coresight_desc *desc) { return NULL; } @@ -248,6 +251,7 @@ coresight_enable(struct coresight_device *csdev) { return -ENOSYS; } static inline void coresight_disable(struct coresight_device *csdev) {} static inline int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) { return 1; } +static inline void coresight_abort(void) {} #endif #if defined(CONFIG_OF) && defined(CONFIG_CORESIGHT) -- cgit v1.2.3