linux-kernel - Re: [PATCH] pci-hyperv: Use only 16 bit integer for PCI domain

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Message-ID: <20170525075639.GA25929@infradead.org>
Date:   Thu, 25 May 2017 00:56:39 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     haiyangz@...rosoft.com
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org, kys@...rosoft.com,
        sthemmin@...rosoft.com, olaf@...fle.de, vkuznets@...hat.com,
        driverdev-devel@...uxdriverproject.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pci-hyperv: Use only 16 bit integer for PCI domain

On Wed, May 24, 2017 at 01:39:15PM -0700, Haiyang Zhang wrote:
> From: Haiyang Zhang <haiyangz@...rosoft.com>
> 
> This patch uses the lower 16 bits of the serial number as PCI
> domain, otherwise some drivers may not be able to handle it.
> 
> Besides Nvidia drivers, we also found X.org, and DPDK handle
> only 16 bit PCI domain.

And they will all break behind VMD for example, so NAK.  Linux domains
are 32 bits.