linux-kernel - Re: [PATCH v2 3/3] irqchip/gicv3-its: Handle OF device tree "msi-map" properties.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 23 Sep 2015 10:08:39 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	Marc Zyngier <marc.zyngier@....com>
CC:	David Daney <ddaney.cavm@...il.com>,
	<linux-kernel@...r.kernel.org>, Will Deacon <will.deacon@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH v2 3/3] irqchip/gicv3-its:  Handle OF device tree "msi-map"
 properties.

On 09/23/2015 10:01 AM, Marc Zyngier wrote:
> On Tue, 22 Sep 2015 17:00:06 -0700
> David Daney <ddaney.cavm@...il.com> wrote:
>
>> From: David Daney <david.daney@...ium.com>
>>
>> Call of_msi_map_rid() to handle mapping of the requester id.
>>
>> Signed-off-by: David Daney <david.daney@...ium.com>
>> ---
>>   drivers/irqchip/irq-gic-v3-its-pci-msi.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
>> index cf351c6..8b1c938 100644
>> --- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c
>> +++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
>> @@ -86,7 +86,8 @@ static int its_pci_msi_prepare(struct irq_domain *domain, struct device *dev,
>>   	pci_for_each_dma_alias(pdev, its_get_pci_alias, &dev_alias);
>>
>>   	/* ITS specific DeviceID, as the core ITS ignores dev. */
>> -	info->scratchpad[0].ul = dev_alias.dev_id;
>> +	info->scratchpad[0].ul = of_msi_map_rid(dev, domain->of_node,
>> +						dev_alias.dev_id);
>>
>>   	return msi_info->ops->msi_prepare(domain->parent,
>>   					  dev, dev_alias.count, info);
>
> I really wonder if that shouldn't be part of the pci_for_each_dma_alias
> call. It would make a lot more sense for this functionality to be an
> integral part of the core code, and would probably make the integration
> of _IORT (which has the exact same requirements) a bit easier.
>
> Thoughts?
>

I am a proponent of pushing things like this as far into the core code 
as possible.  So, from that point of view, I think it would probably be 
a good idea.

I can prepare a patch that does that, but it would also be nice hear 
from other maintainers and get their thoughts on this.


> 	M.
>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/