clocksource: arm_arch_timer: Enable counter access for 32-bit ARM

The only difference between arm and arm64's implementations of
arch_counter_set_user_access is that 32-bit ARM does not enable user
access to the virtual counter.  We want to enable this access for the
32-bit ARM VDSO, so copy the arm64 version to the driver itself, and
remove the arch-specific implementations.

Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 0704e0c..b7ae444 100644 (file)
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -99,20 +99,6 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl)
        asm volatile("mcr p15, 0, %0, c14, c1, 0" : : "r" (cntkctl));
 }
 
-static inline void arch_counter_set_user_access(void)
-{
-       u32 cntkctl = arch_timer_get_cntkctl();
-
-       /* Disable user access to both physical/virtual counters/timers */
-       /* Also disable virtual event stream */
-       cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN
-                       | ARCH_TIMER_USR_VT_ACCESS_EN
-                       | ARCH_TIMER_VIRT_EVT_EN
-                       | ARCH_TIMER_USR_VCT_ACCESS_EN
-                       | ARCH_TIMER_USR_PCT_ACCESS_EN);
-       arch_timer_set_cntkctl(cntkctl);
-}
-
 static inline void arch_timer_evtstrm_enable(int divider)
 {
        u32 cntkctl = arch_timer_get_cntkctl();

diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 9400596..49e94c6 100644 (file)
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -104,23 +104,6 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl)
        asm volatile("msr       cntkctl_el1, %0" : : "r" (cntkctl));
 }
 
-static inline void arch_counter_set_user_access(void)
-{
-       u32 cntkctl = arch_timer_get_cntkctl();
-
-       /* Disable user access to the timers and the physical counter */
-       /* Also disable virtual event stream */
-       cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN
-                       | ARCH_TIMER_USR_VT_ACCESS_EN
-                       | ARCH_TIMER_VIRT_EVT_EN
-                       | ARCH_TIMER_USR_PCT_ACCESS_EN);
-
-       /* Enable user access to the virtual counter */
-       cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN;
-
-       arch_timer_set_cntkctl(cntkctl);
-}
-
 static inline void arch_timer_evtstrm_enable(int divider)
 {
        u32 cntkctl = arch_timer_get_cntkctl();

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index e0e7729..42bd445 100644 (file)
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -312,6 +312,23 @@ static void arch_timer_configure_evtstream(void)
        arch_timer_evtstrm_enable(min(pos, 15));
 }
 
+static void arch_counter_set_user_access(void)
+{
+       u32 cntkctl = arch_timer_get_cntkctl();
+
+       /* Disable user access to the timers and the physical counter */
+       /* Also disable virtual event stream */
+       cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN
+                       | ARCH_TIMER_USR_VT_ACCESS_EN
+                       | ARCH_TIMER_VIRT_EVT_EN
+                       | ARCH_TIMER_USR_PCT_ACCESS_EN);
+
+       /* Enable user access to the virtual counter */
+       cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN;
+
+       arch_timer_set_cntkctl(cntkctl);
+}
+
 static int arch_timer_setup(struct clock_event_device *clk)
 {
        __arch_timer_setup(ARCH_CP15_TIMER, clk);