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There are cases when it is useful to use both ACPI and DTB provided by the bootloader, however in such cases we should make sure to prevent conflicts between the two. Namely, don't try to use DTB for SMP setup if ACPI is enabled. Precisely, this prevents at least: - incorrectly calling register_lapic_address(APIC_DEFAULT_PHYS_BASE) after the LAPIC was already successfully enumerated via ACPI, causing noisy kernel warnings and probably potential real issues as well - failed IOAPIC setup in the case when IOAPIC is enumerated via mptable instead of ACPI (e.g. with acpi=noirq), due to mpparse_parse_smp_config() overridden by x86_dtb_parse_smp_config() Signed-off-by: Dmytro Maluka <dmaluka@chromium.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20250105172741.3476758-2-dmaluka@chromium.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 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.