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

On Wed, Oct 7, 2015 at 12:12 AM, Marc Zyngier [off-list ref] wrote:

On 06/10/15 23:32, Duc Dang wrote:

quoted

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 <redacted>

Reviewed-by: Marc Zyngier <redacted>

Thanks, Marc.

        M.
--
Jazz is not dead. It just smells funny...

Regards,
Duc Dang.