Re: [Xen-devel] XEN/ARM - Odroid XU - Exynos 5422 based dom0 help

[Suriyan Ramasami <suriyan.r@xxxxxxxxx>]

Just to close the loop.

I did find that psci was not handled for SMP in the 3.10 kernel
(hardkernel repo). Afer correcting it in arch/arm/kernel/setup.c and
arch/arm/kernel/psci.c/psci_smp.c all is well!


On Tue, Aug 26, 2014 at 12:22 PM, Suriyan Ramasami <suriyan.r@xxxxxxxxx> wrote:
> Hello All,
>    I am extremely thankful for the support that this mailing list has
> provided me in the past! Thank you!
>
>    I have an Odroid XU3, and its based off Exynos 5422. It has 4 A15s
> and 4 A7s in 2 clusters. Both clusters can be on at the same time.
>
>    I have successfully got XEN (uboot with HYP enabled) to power on
> all 8 CPU cores and it is happy.
>
>    The issue is with dom0. The board has a 3.10 linux based kernel
> (https://github.com/hardkernel/linux.git -b odroidxu3-3.10.y). While
> trying to bring up the secondary CPUs it is poking the PMU registers
> on its own, and causing all kinds of grief. I can get it to boot all
> the way if the dtb is modified to have a single CPU (and hence does
> not do any poking around with the CPUs as it has no secondary CPUs to
> boot up)
>
>  I believe the psci and smp bits for ARM in it (linux 3.10) might be a
> little broken. Is this true? I did see some patches from Stefano wrt
> XEN/ARM on the 3.10 tree which are related to SMP on ARM. I know I can
> dig deep into it and pick the relevant stuff, but was wondering if
> there are experts here who know what patches to pick.
>
> Thanks!
> - Suriyan

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