Maxim Levitsky b08aac8e3a KVM: SVM: Add a helper to detect VMRUN failures
JIRA: https://issues.redhat.com/browse/RHEL-151869

commit 217463aa329ea9a2efafd1bbfa6787e8df9091b9
Author: Sean Christopherson <seanjc@google.com>
Date:   Tue Dec 30 13:13:40 2025 -0800

    KVM: SVM: Add a helper to detect VMRUN failures

    Add a helper to detect VMRUN failures so that KVM can guard against its
    own long-standing bug, where KVM neglects to set exitcode[63:32] when
    synthesizing a nested VMFAIL_INVALID VM-Exit.  This will allow fixing
    KVM's mess of treating exitcode as two separate 32-bit values without
    breaking KVM-on-KVM when running on an older, unfixed KVM.

    Cc: Jim Mattson <jmattson@google.com>
    Cc: Yosry Ahmed <yosry.ahmed@linux.dev>
    Reviewed-by: Yosry Ahmed <yosry.ahmed@linux.dev>
    Link: https://patch.msgid.link/20251230211347.4099600-2-seanjc@google.com
    Signed-off-by: Sean Christopherson <seanjc@google.com>

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
2026-07-21 14:11:57 -04:00
2026-07-15 11:04:26 -04:00
2026-07-01 16:16:28 -04:00

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.
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