kernel/git/stable/linux.git/arch/ia64/pci, branch master

arch: Remove Itanium (IA-64) architecture

2023-09-11T08:13:17+00:00

The Itanium architecture is obsolete, and an informal survey [0] reveals that any residual use of Itanium hardware in production is mostly HP-UX or OpenVMS based. The use of Linux on Itanium appears to be limited to enthusiasts that occasionally boot a fresh Linux kernel to see whether things are still working as intended, and perhaps to churn out some distro packages that are rarely used in practice. None of the original companies behind Itanium still produce or support any hardware or software for the architecture, and it is listed as 'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers that contributed on behalf of those companies (nor anyone else, for that matter) have been willing to support or maintain the architecture upstream or even be responsible for applying the odd fix. The Intel firmware team removed all IA-64 support from the Tianocore/EDK2 reference implementation of EFI in 2018. (Itanium is the original architecture for which EFI was developed, and the way Linux supports it deviates significantly from other architectures.) Some distros, such as Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have dropped support years ago. While the argument is being made [1] that there is a 'for the common good' angle to being able to build and run existing projects such as the Grid Community Toolkit [2] on Itanium for interoperability testing, the fact remains that none of those projects are known to be deployed on Linux/ia64, and very few people actually have access to such a system in the first place. Even if there were ways imaginable in which Linux/ia64 could be put to good use today, what matters is whether anyone is actually doing that, and this does not appear to be the case. There are no emulators widely available, and so boot testing Itanium is generally infeasible for ordinary contributors. GCC still supports IA-64 but its compile farm [3] no longer has any IA-64 machines. GLIBC would like to get rid of IA-64 [4] too because it would permit some overdue code cleanups. In summary, the benefits to the ecosystem of having IA-64 be part of it are mostly theoretical, whereas the maintenance overhead of keeping it supported is real. So let's rip off the band aid, and remove the IA-64 arch code entirely. This follows the timeline proposed by the Debian/ia64 maintainer [5], which removes support in a controlled manner, leaving IA-64 in a known good state in the most recent LTS release. Other projects will follow once the kernel support is removed. [0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/ [1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/ [2] https://gridcf.org/gct-docs/latest/index.html [3] https://cfarm.tetaneutral.net/machines/list/ [4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/ [5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/ Acked-by: Tony Luck Signed-off-by: Ard Biesheuvel

docs: move ia64 architecture docs under Documentation/arch/

2023-04-10T22:45:52+00:00

Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/ia64 into arch/ and fix all in-tree references. Signed-off-by: Jonathan Corbet

PCI/sysfs: Find shadow ROM before static attribute initialization

2022-01-26T16:41:21+00:00

Ville reported that the sysfs "rom" file for VGA devices disappeared after 527139d738d7 ("PCI/sysfs: Convert "rom" to static attribute"). Prior to 527139d738d7, FINAL fixups, including pci_fixup_video() where we find shadow ROMs, were run before pci_create_sysfs_dev_files() created the sysfs "rom" file. After 527139d738d7, "rom" is a static attribute and is created before FINAL fixups are run, so we didn't create "rom" files for shadow ROMs: acpi_pci_root_add ... pci_scan_single_device pci_device_add pci_fixup_video # <-- new HEADER fixup device_add ... if (grp->is_visible()) pci_dev_rom_attr_is_visible # after 527139d738d7 pci_bus_add_devices pci_bus_add_device pci_fixup_device(pci_fixup_final) pci_fixup_video # <-- previous FINAL fixup pci_create_sysfs_dev_files if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) sysfs_create_bin_file("rom") # before 527139d738d7 Change pci_fixup_video() to be a HEADER fixup so it runs before sysfs static attributes are initialized. Rename the Loongson pci_fixup_radeon() to pci_fixup_video() and make its dmesg logging identical to the others since it is doing the same job. Link: https://lore.kernel.org/r/YbxqIyrkv3GhZVxx@intel.com Fixes: 527139d738d7 ("PCI/sysfs: Convert "rom" to static attribute") Link: https://lore.kernel.org/r/20220126154001.16895-1-helgaas@kernel.org Reported-by: Ville Syrjälä Tested-by: Ville Syrjälä Signed-off-by: Bjorn Helgaas Cc: stable@vger.kernel.org # v5.13+ Cc: Huacai Chen Cc: Jiaxun Yang Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: Krzysztof Wilczyński

ia64: remove support for machvecs

2019-08-16T21:32:26+00:00

The only thing remaining of the machvecs is a few checks if we are running on an SGI UV system. Replace those with the existing is_uv_system() check that has been rewritten to simply check the OEM ID directly. That leaves us with a generic kernel that is as fast as the previous DIG/ZX1/UV kernels, but can support all hardware. Support for UV and the HP SBA IOMMU is now optional based on new config options. Signed-off-by: Christoph Hellwig Link: https://lkml.kernel.org/r/20190813072514.23299-27-hch@lst.de Signed-off-by: Tony Luck

ia64: remove now unused machvec indirections

2019-08-16T18:33:57+00:00

With the SGI SN2 machvec removal most of the indirections are unused now, so remove them. This includes the entire removal of the mmio read*/write* macros as the generic ones are identical to the asm-generic/io.h version. Signed-off-by: Christoph Hellwig Link: https://lkml.kernel.org/r/20190813072514.23299-17-hch@lst.de Signed-off-by: Tony Luck

docs: ia64: convert to ReST

2019-07-15T12:20:25+00:00

Rename the ia64 documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. There are two upper case file names. Rename them to lower case, as we're working to avoid upper case file names at Documentation. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

treewide: Add SPDX license identifier for missed files

2019-05-21T08:50:45+00:00

Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

mm: remove include/linux/bootmem.h

2018-10-31T15:54:16+00:00

Move remaining definitions and declarations from include/linux/bootmem.h into include/linux/memblock.h and remove the redundant header. The includes were replaced with the semantic patch below and then semi-automated removal of duplicated '#include @@ @@ - #include + #include [sfr@canb.auug.org.au: dma-direct: fix up for the removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/20181002185342.133d1680@canb.auug.org.au [sfr@canb.auug.org.au: powerpc: fix up for removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/20181005161406.73ef8727@canb.auug.org.au [sfr@canb.auug.org.au: x86/kaslr, ACPI/NUMA: fix for linux/bootmem.h removal] Link: http://lkml.kernel.org/r/20181008190341.5e396491@canb.auug.org.au Link: http://lkml.kernel.org/r/1536927045-23536-30-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport Signed-off-by: Stephen Rothwell Acked-by: Michal Hocko Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Kroah-Hartman Cc: Guan Xuetao Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Jonas Bonn Cc: Jonathan Corbet Cc: Ley Foon Tan Cc: Mark Salter Cc: Martin Schwidefsky Cc: Matt Turner Cc: Michael Ellerman Cc: Michal Simek Cc: Palmer Dabbelt Cc: Paul Burton Cc: Richard Kuo Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Serge Semin Cc: Thomas Gleixner Cc: Tony Luck Cc: Vineet Gupta Cc: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

dma-mapping: make the get_required_mask method available unconditionally

2018-10-01T14:27:00+00:00

This save some duplication for ia64, and makes the interface more general. In the long run we want each dma_map_ops instance to fill this out, but this will take a little more prep work. Signed-off-by: Christoph Hellwig Acked-by: Benjamin Herrenschmidt