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tegra: Set CNTFRQ for secondary CPUs

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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 <jan.kiszka@siemens.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Tested-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Jan Kiszka 2015-04-21 07:18:37 +02:00 committed by Tom Warren
parent 73169874a2
commit a0d0a594cc
1 changed files with 13 additions and 0 deletions
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13
arch/arm/mach-tegra/psci.S
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@ -51,12 +51,25 @@ ENTRY(psci_arch_init)
str r5, [r4] str r5, [r4]
bl psci_get_cpu_id @ CPU ID => r0 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 bl psci_get_cpu_stack_top @ stack top => r0
mov sp, r0 mov sp, r0
bx r6 bx r6
ENDPROC(psci_arch_init) ENDPROC(psci_arch_init)
_sys_clock_freq:
.word 0
ENTRY(psci_cpu_off) ENTRY(psci_cpu_off)
bl psci_cpu_off_common bl psci_cpu_off_common