On Tue, 18 Mar 2014, Gregory CLEMENT wrote:
> On 07/03/2014 18:17, Thomas Gleixner wrote:
> > It might be the readback of the routing register. I don't have the
> > datasheet of this.
>
> Sorry for the delay, I was on vacation without the hardware to test it.
>
> Indeed it was the readback of the routing register. (Unfortunately the
> datasheet was not yet publicly available :( ). In your patch by replacing
> the line:
>
> writel(mask, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
>
> by the following ones:
>
> reg = readl(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
> reg = (reg & (~ARMADA_370_XP_INT_SOURCE_CPU_MASK)) | mask;
> writel(reg, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
>
> with
> #define ARMADA_370_XP_INT_SOURCE_CPU_MASK 0xF
>
> Then it worked.
>
> About masking with the online CPU in the original code, the purpose
> was to allow sharing the SoC with an other OS by doing AMP. This feature
> is part of the Marvell version of the kernel.
> The idea was to bring this latter in the vanilla kernel, but I am not sure
> that all the part needed for AMP are acceptable for mainline. So I can add
> it back later when we will need it.
Right.
So are you ok with that patch (including your change) ? If you send me
tested/acked-by i'll route it for 3.15
Thanks,
tglx
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