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7e845ecb2f
The PCI Code and ID Assignment spec, r1.15, secs 1.4 and 1.1, define VGA Base Class and Sub-Classes: 03 00 PCI_CLASS_DISPLAY_VGA VGA-compatible or 8514-compatible 00 01 PCI_CLASS_NOT_DEFINED_VGA VGA-compatible (before Class Code) Add a pci_is_vga() helper to return true if a device is in either category. These VGA devices use the hardwired legacy VGA resources ([mem 0xa0000-0xbffff], [io 0x3b0-0x3bb], [io 0x3c0-0x3df] and aliases), so they require special handling if more than one is present in the system. Link: https://lore.kernel.org/r/20230830111532.444535-2-sui.jingfeng@linux.dev Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn> [bhelgaas: commit log, drop !pdev test] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: "Maciej W. Rozycki" <macro@orcam.me.uk> |
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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.