From mboxrd@z Thu Jan  1 00:00:00 1970
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Subject: Need clarity on MSI handling in RC driver
To: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
References: <2fea5a0c-7410-97fd-91d1-ae6a06ab1a52@gmail.com>
Cc: helgaas@kernel.org, marc.zyngier@arm.com, arnd@arndb.de,
 mark.rutland@arm.com
From: valmiki <valmikibow@gmail.com>
Message-ID: <307e8512-7e14-39a2-c225-6db44e443aea@gmail.com>
Date: Wed, 4 Jan 2017 23:09:06 +0530
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List-ID: <linux-pci.vger.kernel.org>

Hi All,

I have a doubt, the MSI domains are handled differently in different RC 
drivers.

Some drivers use irq_domain_add_linear alone, and some use 
pci_msi_create_irq_domain also to handle MSI.

In most of the 32-bit architectures only irq_domain_add_linear is used 
and in 64 bit drivers both pci_msi_create_irq_domain and 
irq_domain_add_linear are used.

So is this because of architecture difference between ARM and ARM64 ?

Thanks & Regards,
valmiki