[U-Boot] [PATCH 00/10] sunxi: Add basic PSCI support to enable SMP on the A80's first cluster

[Jagan Teki]

On Tue, May 2, 2017 at 4:16 PM, Jagan Teki <jagannadh.teki at gmail.com> wrote:
> On Fri, Jan 27, 2017 at 4:14 AM, Rask Ingemann Lambertsen
> <rask at formelder.dk> wrote:
>> On Wed, Jan 25, 2017 at 06:40:38PM +0800, Chen-Yu Tsai wrote:
>>
>> [hacking around the broken A80 TrustZone implementation]
>>> This is doable, and it is actually what Allwinner's kernel does, but is
>>> really hackish. The released 3.4 kernel also has the same workarounds
>>> for A83T. So it's also possible the A83T has the same issues.
>>
>> FWIW, the kernel that ships with my A80 based media player produces this:
>> [    0.000000] Linux version 3.4.39+ (lzq at sunchip-CS24-TY) (gcc version 4.6.3 20120201 (prerelease) (crosstool-NG linaro-1.13.1-2012.02-20120222 - Linaro GCC 2012.02) ) #1 SMP PREEMPT Sat Nov 14 03:33:12 UTC 2015
>> ...
>> [    0.262230] CPU4: failed to boot: -22
>> [    0.302298] CPU5: failed to boot: -22
>> [    0.342350] CPU6: failed to boot: -22
>> [    0.382421] CPU7: failed to boot: -22
>>
>> So I guess you are not alone in having trouble getting PSCI to work on the
>> A80. However, when trying out your patches, I also once or twice got a
>> failure booting CPU2 although CPU3 and CPU4 came up fine.
>>
>>> So, if there's still interest in getting a working PSCI environment
>>> for the A80/A83T, I'll look into doing a workaround patch for GIC-400.
>>> Otherwise I'm going to go back and revive my MCPM patches for in-kernel
>>> SMP support.
>>
>> I vote for whatever works. I'll also happily test it. Is there a git tree
>> I should keep an eye on?
>
> Any further update on this series? I think there is an issue this wrt comment on
> "[U-Boot,09/10] sunxi: Enable PSCI on sun9i/A80"  patch, Please send
> the next version on once resolved. Will mark this series as
> "Superseded"

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