Date: Wed, 21 Jun 2017 20:19:47 +0200
From: Robert Richter <robert.richter@cavium.com>
To: Geetha sowjanya <gakula@caviumnetworks.com>
Cc: will.deacon@arm.com, robin.murphy@arm.com, lorenzo.pieralisi@arm.com,
        hanjun.guo@linaro.org, sudeep.holla@arm.com,
        iommu@lists.linux-foundation.org, robert.moore@intel.com,
        lv.zheng@intel.com, rjw@rjwysocki.net, jcm@redhat.com,
        linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
        sgoutham@cavium.com, linux-arm-kernel@lists.infradead.org,
        linux-acpi@vger.kernel.org, geethasowjanya.akula@gmail.com,
        devel@acpica.org, linu.cherian@cavium.com,
        Charles.Garcia-Tobin@arm.com, robh@kernel.org,
        Geetha Sowjanya <geethasowjanya.akula@cavium.com>
Subject: Re: [PATCH v8 3/3] iommu/arm-smmu-v3: Add workaround for Cavium
 ThunderX2 erratum #126
Message-ID: <20170621181947.GH16981@rric.localdomain>
References: <1497968259-16390-1-git-send-email-gakula@caviumnetworks.com>
 <1497968259-16390-4-git-send-email-gakula@caviumnetworks.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1497968259-16390-4-git-send-email-gakula@caviumnetworks.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2017 18:19:56.8555 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR07MB2349
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 721
Lines: 19

On 20.06.17 19:47:39, Geetha sowjanya wrote:
> From: Geetha Sowjanya <geethasowjanya.akula@cavium.com>
> 
> Cavium ThunderX2 SMMU doesn't support MSI and also doesn't have unique irq
> lines for gerror, eventq and cmdq-sync.
> 
> SHARED_IRQ option is set as a errata workaround, which allows to share the irq
> line by register single irq handler for all the interrupts.

I found the entry in silicon-errata.txt missing, is that on purpose?

-Robert

> 
> Signed-off-by: Geetha sowjanya <gakula@caviumnetworks.com>
> ---
>  .../devicetree/bindings/iommu/arm,smmu-v3.txt      |    5 ++
>  drivers/iommu/arm-smmu-v3.c                        |   73 ++++++++++++++++----
>  2 files changed, 64 insertions(+), 14 deletions(-)