From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/1] irqchip/GICv2m: Add workaround for APM X-Gene GICv2m erratum
Date: Wed, 07 Oct 2015 08:12:06 +0100 [thread overview]
Message-ID: <5614C5C6.5090207@arm.com> (raw)
In-Reply-To: <b0fcb89a51a86b5edb85d2b03cf26ca60bd51f01.1444069886.git.dhdang@apm.com>
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@apm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com>
To: Duc Dang <dhdang@apm.com>,
Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>,
Jason Cooper <jason@lakedaemon.net>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org,
linux-arm <linux-arm-kernel@lists.infradead.org>,
patches@apm.com
Subject: Re: [PATCH v2 1/1] irqchip/GICv2m: Add workaround for APM X-Gene GICv2m erratum
Date: Wed, 07 Oct 2015 08:12:06 +0100 [thread overview]
Message-ID: <5614C5C6.5090207@arm.com> (raw)
In-Reply-To: <b0fcb89a51a86b5edb85d2b03cf26ca60bd51f01.1444069886.git.dhdang@apm.com>
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@apm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2015-10-07 7:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-02 22:16 [PATCH 1/1] irqchip/GICv2m: Add workaround for APM X-Gene GICv2m erratum Duc Dang
2015-10-02 22:16 ` Duc Dang
2015-10-03 13:26 ` Marc Zyngier
2015-10-03 13:26 ` Marc Zyngier
2015-10-06 22:30 ` Duc Dang
2015-10-06 22:30 ` Duc Dang
2015-10-06 22:32 ` [PATCH v2 " Duc Dang
2015-10-06 22:32 ` Duc Dang
2015-10-07 7:12 ` Marc Zyngier [this message]
2015-10-07 7:12 ` Marc Zyngier
2015-10-07 18:08 ` Duc Dang
2015-10-07 18:08 ` Duc Dang
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