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Commit 7b4edf24 authored by Greg Hackmann's avatar Greg Hackmann Committed by Kyle Yan
Browse files

clocksource: arch_timer: make virtual counter access configurable 



Change-Id: Ibdb1fd768b748002b90bfc165612c12c8311f8a2
Signed-off-by: default avatarGreg Hackmann <ghackmann@google.com>
Signed-off-by: default avatarKyle Yan <kyan@codeaurora.org>
parent 59ce4ce1

drivers/clocksource/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -315,6 +315,14 @@ config FSL_ERRATUM_A008585 
	  value").  The workaround will only be active if the

	  fsl,erratum-a008585 property is found in the timer node.



config ARM_ARCH_TIMER_VCT_ACCESS

	bool "Support for ARM architected timer virtual counter access in userspace"

	default !ARM64

	depends on ARM_ARCH_TIMER

	help

	  This option enables support for reading the ARM architected timer's

	  virtual counter in userspace.



config ARM_GLOBAL_TIMER

	bool "Support for the ARM global timer" if COMPILE_TEST

	select CLKSRC_OF if OF

drivers/clocksource/arm_arch_timer.c

+7 −2
Original line number Diff line number Diff line
@@ -447,8 +447,13 @@ static void arch_counter_set_user_access(void) 
			| ARCH_TIMER_USR_VT_ACCESS_EN

			| ARCH_TIMER_VIRT_EVT_EN);



	/* Enable user access to the virtual and physical counters */

	cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN | ARCH_TIMER_USR_PCT_ACCESS_EN;

	cntkctl |= ARCH_TIMER_USR_PCT_ACCESS_EN;



	/* Enable user access to the virtual counter */

	if (IS_ENABLED(CONFIG_ARM_ARCH_TIMER_VCT_ACCESS))

		cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN;

	else

		cntkctl &= ~ARCH_TIMER_USR_VCT_ACCESS_EN;



	arch_timer_set_cntkctl(cntkctl);

}