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KVM has strategies to perform machine check recovery. If a MCE hits in a guest, have the low level handler just decode and save the MCE but not try to recover anything, so KVM can deal with it. The host does not own SLBs and does not need to report the SLB state in case of a multi-hit for example, or know about the virtual memory map of the guest. UE and memory poisoning of guest pages in the host is one thing that is possibly not completely robust at the moment, but this too needs to go via KVM (possibly via the guest and back out to host via hcall) rather than being handled at a low level in the host handler. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201128070728.825934-3-npiggin@gmail.com
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 Restructured Text 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.