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authorPaul Moore <pmoore@redhat.com>2014-01-28 14:44:16 -0500
committerPaul Moore <pmoore@redhat.com>2014-02-05 10:39:48 -0500
commit825e587af2e90e9b953849f3347a01d8f383d577 (patch)
treee48942a05882da47544e179c6a0c920e00137a6a /arch/arm/include/asm/arch_timer.h
parent8ed814602876bec9bad2649ca17f34b499357a1c (diff)
parentd8ec26d7f8287f5788a494f56e8814210f0e64be (diff)
Merge tag 'v3.13' into stable-3.14
Linux 3.13 Conflicts: security/selinux/hooks.c Trivial merge issue in selinux_inet_conn_request() likely due to me including patches that I sent to the stable folks in my next tree resulting in the patch hitting twice (I think). Thankfully it was an easy fix this time, but regardless, lesson learned, I will not do that again.
Diffstat (limited to 'arch/arm/include/asm/arch_timer.h')
-rw-r--r--arch/arm/include/asm/arch_timer.h36
1 files changed, 31 insertions, 5 deletions
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 5665134bfa3..0704e0cf557 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -87,17 +87,43 @@ static inline u64 arch_counter_get_cntvct(void)
return cval;
}
-static inline void arch_counter_set_user_access(void)
+static inline u32 arch_timer_get_cntkctl(void)
{
u32 cntkctl;
-
asm volatile("mrc p15, 0, %0, c14, c1, 0" : "=r" (cntkctl));
+ return cntkctl;
+}
- /* disable user access to everything */
- cntkctl &= ~((3 << 8) | (7 << 0));
-
+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();
+ cntkctl &= ~ARCH_TIMER_EVT_TRIGGER_MASK;
+ /* Set the divider and enable virtual event stream */
+ cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT)
+ | ARCH_TIMER_VIRT_EVT_EN;
+ arch_timer_set_cntkctl(cntkctl);
+ elf_hwcap |= HWCAP_EVTSTRM;
+}
+
#endif
#endif