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Commit c92931b2 authored by Max Filippov's avatar Max Filippov Committed by Chris Zankel
Browse files

xtensa: add irq flags trace support 



Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarChris Zankel <chris@zankel.net>
parent 3ae908c9

arch/xtensa/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -55,6 +55,9 @@ source "kernel/Kconfig.freezer" 
config STACKTRACE_SUPPORT

	def_bool y



config TRACE_IRQFLAGS_SUPPORT

	def_bool y



config MMU

	def_bool n

arch/xtensa/kernel/entry.S

+32 −0
Original line number Diff line number Diff line
@@ -389,6 +389,22 @@ common_exception: 


	save_xtregs_opt a1 a2 a4 a5 a6 a7 PT_XTREGS_OPT

	

#ifdef CONFIG_TRACE_IRQFLAGS

	l32i	a4, a1, PT_DEPC

	/* Double exception means we came here with an exception

	 * while PS.EXCM was set, i.e. interrupts disabled.

	 */

	bgeui	a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f

	l32i	a4, a1, PT_EXCCAUSE

	bnei	a4, EXCCAUSE_LEVEL1_INTERRUPT, 1f

	/* We came here with an interrupt means interrupts were enabled

	 * and we've just disabled them.

	 */

	movi	a4, trace_hardirqs_off

	callx4	a4

1:

#endif



	/* Go to second-level dispatcher. Set up parameters to pass to the

	 * exception handler and call the exception handler.

	 */
@@ -407,6 +423,22 @@ common_exception: 
	.global common_exception_return

common_exception_return:



#ifdef CONFIG_TRACE_IRQFLAGS

	l32i	a4, a1, PT_DEPC

	/* Double exception means we came here with an exception

	 * while PS.EXCM was set, i.e. interrupts disabled.

	 */

	bgeui	a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f

	l32i	a4, a1, PT_EXCCAUSE

	bnei	a4, EXCCAUSE_LEVEL1_INTERRUPT, 1f

	/* We came here with an interrupt means interrupts were enabled

	 * and we'll reenable them on return.

	 */

	movi	a4, trace_hardirqs_on

	callx4	a4

1:

#endif



	/* Jump if we are returning from kernel exceptions. */



1:	l32i	a3, a1, PT_PS