diff options
| author | Greg Hackmann <ghackmann@google.com> | 2017-09-19 10:55:17 -0700 |
|---|---|---|
| committer | Neeraj Upadhyay <neeraju@codeaurora.org> | 2018-01-05 16:03:53 +0530 |
| commit | 3851c63407176bbdab64accf4903873ff005f1f6 (patch) | |
| tree | 9b4172270e89af734e9f33ce9ade7cf72da76160 /drivers/clocksource | |
| parent | 022df8a55a6696c38a7442299292fd0d4d22d39f (diff) | |
clocksource: arch_timer: make virtual counter access configurable
Change-Id: Ibdb1fd768b748002b90bfc165612c12c8311f8a2
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 8 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 8bf3355e95db..64b8158675b5 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -167,6 +167,14 @@ config MSM_TIMER_LEAP counter rollover. On every counter read if least significant 32 bits are set, reread counter. +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 diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 5dc26d29e4a4..893c91a45e47 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -332,8 +332,12 @@ 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); } |