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Paolo Bonzini a24dbf986b KVM VMX changes for 6.15
- Fix a bug where KVM unnecessarily reads XFD_ERR from hardware and thus
    modifies the vCPU's XFD_ERR on a #NM due to CR0.TS=1.
 
  - Pass XFD_ERR as a psueo-payload when injecting #NM as a preparatory step
    for upcoming FRED virtualization support.
 
  - Decouple the EPT entry RWX protection bit macros from the EPT Violation bits
    as a general cleanup, and in anticipation of adding support for emulating
    Mode-Based Execution (MBEC).
 
  - Reject KVM_RUN if userspace manages to gain control and stuff invalid guest
    state while KVM is in the middle of emulating nested VM-Enter.
 
  - Add a macro to handle KVM's sanity checks on entry/exit VMCS control pairs
    in anticipation of adding sanity checks for secondary exit controls (the
    primary field is out of bits).
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Merge tag 'kvm-x86-vmx-6.15' of https://github.com/kvm-x86/linux into HEAD

KVM VMX changes for 6.15

 - Fix a bug where KVM unnecessarily reads XFD_ERR from hardware and thus
   modifies the vCPU's XFD_ERR on a #NM due to CR0.TS=1.

 - Pass XFD_ERR as a psueo-payload when injecting #NM as a preparatory step
   for upcoming FRED virtualization support.

 - Decouple the EPT entry RWX protection bit macros from the EPT Violation bits
   as a general cleanup, and in anticipation of adding support for emulating
   Mode-Based Execution (MBEC).

 - Reject KVM_RUN if userspace manages to gain control and stuff invalid guest
   state while KVM is in the middle of emulating nested VM-Enter.

 - Add a macro to handle KVM's sanity checks on entry/exit VMCS control pairs
   in anticipation of adding sanity checks for secondary exit controls (the
   primary field is out of bits).
History 2025-03-19 09:05:52 -04:00
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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.