On Mon, Feb 16, 2015 at 12:54:49PM +0000, Jan Kiszka wrote:
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
arch/arm/cpu/armv7/tegra-common/psci.S | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/arch/arm/cpu/armv7/tegra-common/psci.S b/arch/arm/cpu/armv7/tegra-common/psci.S index b7501fb..119c246 100644 --- a/arch/arm/cpu/armv7/tegra-common/psci.S +++ b/arch/arm/cpu/armv7/tegra-common/psci.S @@ -51,12 +51,25 @@ ENTRY(psci_arch_init)
mrc p15, 0, r4, c0, c0, 5 @ MPIDR and r4, r4, #7 @ number of CPUs in cluster
- adr r5, _sys_clock_freq
- cmp r4, #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
Is it not possible to have a hook that uses the same variable as arch_timer_init rather than doing a here copy? It seems a shame to duplicate the effort.
Thanks, Mark.
bl psci_get_cpu_stack_top mov sp, r5
bx r6
ENDPROC(psci_arch_init)
+_sys_clock_freq:
- .word
ENTRY(psci_cpu_off) bl psci_cpu_off_common
-- 2.1.4