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.
Kirill A. Shutemov
authored
ACPI MADT doesn't allow to offline a CPU after it was onlined. This limits kexec: the second kernel won't be able to use more than one CPU. To prevent a kexec kernel from onlining secondary CPUs, invalidate the mailbox address in the ACPI MADT wakeup structure which prevents a kexec kernel to use it. This is safe as the booting kernel has the mailbox address cached already and acpi_wakeup_cpu() uses the cached value to bring up the secondary CPUs. Note: This is a Linux specific convention and not covered by the ACPI specification. Signed-off-by:Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by:
Kai Huang <kai.huang@intel.com> Reviewed-by:
Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by:
Tao Liu <ltao@redhat.com> Link: https://lore.kernel.org/r/20240614095904.1345461-16-kirill.shutemov@linux.intel.com