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

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Message-ID: <CADaLNDktcnBv9f9fQ=yfd+OY7AREK5_5ceBhyzW=xOBu1q-hNg@mail.gmail.com>
Date:	Wed, 7 Oct 2015 11:08:53 -0700
From:	Duc Dang <dhdang@....com>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Jason Cooper <jason@...edaemon.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	patches <patches@....com>
Subject: Re: [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 <marc.zyngier@....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@....com>
>
> Reviewed-by: Marc Zyngier <marc.zyngier@....com>

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

Regards,
Duc Dang.
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