linux-kernel - Re: [PATCH v2 0/2] PCI: Add support for PCI Enhanced Allocation "BARs"

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Date:	Wed, 23 Sep 2015 16:26:56 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Sean O. Stalley" <sean.stalley@...el.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Rajat Jain <rajatxjain@...il.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Rafał Miłecki <zajec5@...il.com>,
	"gong.chen@...ux.intel.com" <gong.chen@...ux.intel.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-api@...r.kernel.org
Subject: Re: [PATCH v2 0/2] PCI: Add support for PCI Enhanced Allocation "BARs"

On Wed, Sep 23, 2015 at 3:27 PM, Sean O. Stalley <sean.stalley@...el.com> wrote:
> PCI Enhanced Allocation is a new method of allocating MMIO & IO
> resources for PCI devices & bridges. It can be used instead
> of the traditional PCI method of using BARs.
>
> EA entries are hardware-initialized to a fixed address.
> Unlike BARs, regions described by EA are cannot be moved.
> Because of this, only devices which are permanently connected to
> the PCI bus can use EA. A removable PCI card must not use EA.

As it is fixed, can you put IORESOURCE_PCI_FIXED in the res->flags?

Thanks

Yinghai
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