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Locally #define and use the nested virtualization Consistency Check (CC) macro to handle eVMCS unsupported controls checks. Using the macro loses the existing printing of the unsupported controls, but that's a feature and not a bug. The existing approach is flawed because the @err param to trace_kvm_nested_vmenter_failed() is the error code, not the error value. The eVMCS trickery mostly works as __print_symbolic() falls back to printing the raw hex value, but that subtly relies on not having a match between the unsupported value and VMX_VMENTER_INSTRUCTION_ERRORS. If it's really truly necessary to snapshot the bad value, then the tracepoint can be extended in the future. Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Link: https://lore.kernel.org/r/20220830133737.1539624-9-vkuznets@redhat.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.