From a0d0a594ccf54f4f430d271cab9ddb95958a9495 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 21 Apr 2015 07:18:37 +0200 Subject: [PATCH] tegra: Set CNTFRQ for secondary CPUs We only set CNTFRQ in arch_timer_init for the boot CPU. But this has to happen for all cores. Fixing this resolves problems of KVM with emulating the generic timer/counter. Signed-off-by: Jan Kiszka Reviewed-by: Tom Rini Reviewed-by: Thierry Reding Tested-by: Thierry Reding Tested-by: Ian Campbell Signed-off-by: Tom Warren --- arch/arm/mach-tegra/psci.S | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm/mach-tegra/psci.S b/arch/arm/mach-tegra/psci.S index e4733e6383..b836da1c0e 100644 --- a/arch/arm/mach-tegra/psci.S +++ b/arch/arm/mach-tegra/psci.S @@ -51,12 +51,25 @@ ENTRY(psci_arch_init) str r5, [r4] bl psci_get_cpu_id @ CPU ID => r0 + + adr r5, _sys_clock_freq + cmp r0, #0 + + mrceq p15, 0, r7, c14, c0, 0 @ read CNTFRQ from CPU0 + streq r7, [r5] + + ldrne r7, [r5] + mcrne p15, 0, r7, c14, c0, 0 @ write CNTFRQ to CPU1..3 + bl psci_get_cpu_stack_top @ stack top => r0 mov sp, r0 bx r6 ENDPROC(psci_arch_init) +_sys_clock_freq: + .word 0 + ENTRY(psci_cpu_off) bl psci_cpu_off_common -- 2.39.5