On 03/06/2015 23:45, Chris (Christopher) Brand wrote:
Hi Julien,
Hi Chris,
When the property "clock-frequency" is present in the DT timer node, it means
that the bootloader/firmware didn't correctly configured the
CNTFRQ/CNTFRQ_EL0 on each processor.
I will test this patch, but it doesn't apply cleanly to the version of Xen I'm
currently using, so I need to update that first.
It's based on the latest staging.
I also looked at whether it would be possible to set the CNTFRQ register in the
other cores when they come up. Eventually, I think we should do this in the
(platform-specific) PSCI code. There doesn't seem to be a suitable hook in the
platform-specific Xen code - it looks like all the code there related to
bringing up secondary cores runs on the primary.
CNTFRQ is read-only in the hypervisor when the platform supports EL3
(i.e secure monitor).
So it has to be done either by the bootloader or by the firmware.
Regards,
--
Julien Grall
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