From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: RFC: [PATCH 1/3] Enhance platform support for PCI
Date: Fri, 27 Feb 2015 15:29:37 +0000
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Prasun.kapoor@cavium.com, Manish Jaggi <mjaggi@caviumnetworks.com>, Vijaya Kumar <Vijaya.Kumar@caviumnetworks.com>, Julien Grall <julien.grall@linaro.org>, xen-devel@lists.xen.org, "StefanoStabellini(Stefano.Stabellini@citrix.com)" <stefano.stabellini@citrix.com>, Jan Beulich <JBeulich@suse.com>
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On Fri, 2015-02-27 at 15:24 +0000, Ian Campbell wrote:

> In Linux dom0 we call it walking pci_mmcfg_list, which looking at
> arch/x86/pci/mmconfig-shared.c pci_parse_mcfg is populated by walking
> over a "struct acpi_table_mcfg"

BTW according to
http://lists.linaro.org/pipermail/fw-summit/2015-January/000070.html:

MCFG	Signature Reserved (signature == "MCFG")
	== Memory-mapped ConFiGuration space ==
	If the platform supports PCI/PCIe, an MCFG table is required.

Which for ACPI systems at least we can also parse in Xen. The contents
is in "PCI Firmware Specification, Revision 3.0" which I don't have a
copy of handy.

Ian.