mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-05 09:49:58 -04:00
f5a81d0eb0
Sanitize the VM-Entry/VM-Exit control pairs (load+load or load+clear) during setup instead of checking both controls in a pair at runtime. If only one control is supported, KVM will report the associated feature as not available, but will leave the supported control bit set in the VMCS config, which could lead to corruption of host state. E.g. if only the VM-Entry control is supported and the feature is not dynamically toggled, KVM will set the control in all VMCSes and load zeros without restoring host state. Note, while this is technically a bug fix, practically speaking no sane CPU or VMM would support only one control. KVM's behavior of checking both controls is mostly pedantry. Cc: Chenyi Qiang <chenyi.qiang@intel.com> Cc: Lei Wang <lei4.wang@intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220527170658.3571367-2-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.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.