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Commit 820ebeb2 authored by Se Wang (Patrick) Oh's avatar Se Wang (Patrick) Oh
Browse files

arm64: mm: Log the process id in the rtb 



Store the process id in the register trace buffer.
This gives a general idea about what process was last
running when the RTB stopped.

Change-Id: Idcbd8db9eb451f2d732c935f00b6c50f9af3c592
Signed-off-by: default avatarSe Wang (Patrick) Oh <sewango@codeaurora.org>
parent c952020e

arch/arm64/include/asm/mmu_context.h

+6 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <asm-generic/mm_hooks.h>

#include <asm/cputype.h>

#include <asm/pgtable.h>

#include <linux/msm_rtb.h>



#define MAX_ASID_BITS	16
@@ -38,15 +39,19 @@ void __new_context(struct mm_struct *mm); 
#ifdef CONFIG_PID_IN_CONTEXTIDR

static inline void contextidr_thread_switch(struct task_struct *next)

{

	pid_t pid = task_pid_nr(next);

	asm(

	"	msr	contextidr_el1, %0\n"

	"	isb"

	:

	: "r" (task_pid_nr(next)));

	: "r" (pid));

	uncached_logk(LOGK_CTXID, (void *)(u64)pid);



}

#else

static inline void contextidr_thread_switch(struct task_struct *next)

{

	uncached_logk(LOGK_CTXID, (void *)(u64)task_pid_nr(next));

}

#endif