mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-12 01:20:14 +00:00
b0574ba755
Introduce a small asm stub to transition from the hypervisor to Linux after devirtualization. Devirtualization means disabling hypervisor on the fly, so after it is done, the code is running on physical processor instead of virtual, and hypervisor is gone. This can be done by a root vm only. At a high level, during panic of either the hypervisor or the root, the NMI handler asks hypervisor to devirtualize. As part of that, the arguments include an entry point to return back to Linux. This asm stub implements that entry point. The stub is entered in protected mode, uses temporary gdt and page table to enable long mode and get to kernel entry point which then restores full kernel context to resume execution to kexec. Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.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.