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Commit 261ef84f authored by Greg Hackmann's avatar Greg Hackmann Committed by Gerrit - the friendly Code Review server
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clocksource: arch_timer: make virtual counter access configurable 



Change-Id: Ibdb1fd768b748002b90bfc165612c12c8311f8a2
Signed-off-by: default avatarNeeraj Upadhyay <neeraju@codeaurora.org>
parent 1ad7cba0

drivers/clocksource/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -110,6 +110,14 @@ config ARM_ARCH_TIMER_EVTSTREAM 
	  This must be disabled for hardware validation purposes to detect any

	  hardware anomalies of missing events.



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

	select CLKSRC_OF if OF

drivers/clocksource/arm_arch_timer.c

+6 −2
Original line number Diff line number Diff line
@@ -340,8 +340,12 @@ static void arch_counter_set_user_access(void) 
			| 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

			| ARCH_TIMER_USR_VT_ACCESS_EN;

	cntkctl |= ARCH_TIMER_USR_PCT_ACCESS_EN | ARCH_TIMER_USR_VT_ACCESS_EN;



	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);

}