[PATCH v2 1/1] irqchip/GICv2m: Add workaround for APM X-Gene GICv2m erratum

Duc Dang dhdang at apm.com
Wed Oct 7 11:08:53 PDT 2015

On Wed, Oct 7, 2015 at 12:12 AM, Marc Zyngier <marc.zyngier at arm.com> wrote:
> On 06/10/15 23:32, Duc Dang wrote:
>> APM X-Gene GICv2m implementation has an erratum where the
>> MSI data needs to be the offset from the spi_start in order to
>> trigger the correct MSI interrupt. This is different from the
>> standard GICv2m implementation where the MSI data is the absolute
>> value within the range from spi_start to (spi_start + num_spis)
>> of each v2m frame.
>> This patch reads MSI_IIDR register (present in all GICv2m
>> implementations) to identify X-Gene GICv2m implementation and
>> apply workaround to change the data portion of MSI vector.
>> Signed-off-by: Duc Dang <dhdang at apm.com>
> Reviewed-by: Marc Zyngier <marc.zyngier at arm.com>

Thanks, Marc.
>         M.
> --
> Jazz is not dead. It just smells funny...

Duc Dang.

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