From d075f4a2b8b9b3531a00fa359fdc4c8eb3fad97b Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 2 Oct 2014 14:57:43 +0200 Subject: amba: Add Kconfig file Rather than duplicate the ARM_AMBA Kconfig symbol in both 32-bit and 64-bit ARM architectures, move the common definition to drivers/amba where dependent drivers will be located. Signed-off-by: Thierry Reding --- arch/arm64/Kconfig | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/arm64') diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 9532f8d..db1aa54 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -166,9 +166,6 @@ endmenu menu "Bus support" -config ARM_AMBA - bool - config PCI bool "PCI support" help -- cgit v1.1 From 0b46b8a718c6e90910a1b1b0fe797be3c167e186 Mon Sep 17 00:00:00 2001 From: Sonny Rao Date: Sun, 23 Nov 2014 23:02:44 -0800 Subject: clocksource: arch_timer: Fix code to use physical timers when requested This is a bug fix for using physical arch timers when the arch_timer_use_virtual boolean is false. It restores the arch_counter_get_cntpct() function after removal in 0d651e4e "clocksource: arch_timer: use virtual counters" We need this on certain ARMv7 systems which are architected like this: * The firmware doesn't know and doesn't care about hypervisor mode and we don't want to add the complexity of hypervisor there. * The firmware isn't involved in SMP bringup or resume. * The ARCH timer come up with an uninitialized offset between the virtual and physical counters. Each core gets a different random offset. * The device boots in "Secure SVC" mode. * Nothing has touched the reset value of CNTHCTL.PL1PCEN or CNTHCTL.PL1PCTEN (both default to 1 at reset) One example of such as system is RK3288 where it is much simpler to use the physical counter since there's nobody managing the offset and each time a core goes down and comes back up it will get reinitialized to some other random value. Fixes: 0d651e4e65e9 ("clocksource: arch_timer: use virtual counters") Cc: stable@vger.kernel.org Signed-off-by: Sonny Rao Acked-by: Catalin Marinas Acked-by: Daniel Lezcano Signed-off-by: Olof Johansson --- arch/arm64/include/asm/arch_timer.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/arm64') diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h index f190971..b1fa4e6 100644 --- a/arch/arm64/include/asm/arch_timer.h +++ b/arch/arm64/include/asm/arch_timer.h @@ -104,6 +104,15 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl) asm volatile("msr cntkctl_el1, %0" : : "r" (cntkctl)); } +static inline u64 arch_counter_get_cntpct(void) +{ + /* + * AArch64 kernel and user space mandate the use of CNTVCT. + */ + BUG(); + return 0; +} + static inline u64 arch_counter_get_cntvct(void) { u64 cval; -- cgit v1.1