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| Filename | Latest commit message | Latest commit date |
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b6094c4829
commit eba9799b5a6efe2993cf92529608e4aa8163d73b upstream. Deliberately truncate the exception error code when shoving it into the VMCS (VM-Entry field for vmcs01 and vmcs02, VM-Exit field for vmcs12). Intel CPUs are incapable of handling 32-bit error codes and will never generate an error code with bits 31:16, but userspace can provide an arbitrary error code via KVM_SET_VCPU_EVENTS. Failure to drop the bits on exception injection results in failed VM-Entry, as VMX disallows setting bits 31:16. Setting the bits on VM-Exit would at best confuse L1, and at worse induce a nested VM-Entry failure, e.g. if L1 decided to reinject the exception back into L2. Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Link: https://lore.kernel.org/r/20220830231614.3580124-3-seanjc@google.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| README | ||
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.