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a85d27b2ef
commitc8cc43c1eaupstream. AMD proceessors define an address range that is reserved by HyperTransport and causes a failure if used for guest physical addresses. Avoid selftests failures by reserving those guest physical addresses; the rules are: - On parts with <40 bits, its fully hidden from software. - Before Fam17h, it was always 12G just below 1T, even if there was more RAM above this location. In this case we just not use any RAM above 1T. - On Fam17h and later, it is variable based on SME, and is either just below 2^48 (no encryption) or 2^43 (encryption). Fixes:ef4c9f4f65("KVM: selftests: Fix 32-bit truncation of vm_get_max_gfn()") Cc: stable@vger.kernel.org Cc: David Matlack <dmatlack@google.com> Reported-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20210805105423.412878-1-pbonzini@redhat.com> Reviewed-by: Sean Christopherson <seanjc@google.com> Tested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.