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[ Upstream commit4ab34548c5] Armada XP and new hardware supports access to DEVCAP2, DEVCTL2 and LNKCTL2 configuration registers of PCIe core via PCIE_CAP_PCIEXP. So export them via emulated software root bridge. Pre-XP hardware does not support these registers and returns zeros. Link: https://lore.kernel.org/r/20211125124605.25915-16-pali@kernel.org Fixes:1f08673eef("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.