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f1459315f4
Track the PIR bitmap in posted interrupt descriptor structures as an array of unsigned longs instead of using unionized arrays for KVM (u32s) versus IRQ management (u64s). In practice, because the non-KVM usage is (sanely) restricted to 64-bit kernels, all existing usage of the u64 variant is already working with unsigned longs. Using "unsigned long" for the array will allow reworking KVM's processing of the bitmap to read/write in 64-bit chunks on 64-bit kernels, i.e. will allow optimizing KVM by reducing the number of atomic accesses to PIR. Opportunstically replace the open coded literals in the posted MSIs code with the appropriate macro. Deliberately don't use ARRAY_SIZE() in the for-loops, even though it would be cleaner from a certain perspective, in anticipation of decoupling the processing from the array declaration. No functional change intended. Link: https://lore.kernel.org/r/20250401163447.846608-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
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| rust | ||
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| security | ||
| sound | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
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| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 reStructuredText 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.