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Import iosubmit_cmds512() from arch/x86/include/asm/io.h into tools/ so it can be used by VFIO selftests to interact with Intel DSA devices. Also pull in movdir64b() from arch/x86/include/asm/special_insns.h into tools/, which is the underlying instruction used by iosubmit_cmds512(). Changes made when importing: None Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: David Matlack <dmatlack@google.com> Link: https://lore.kernel.org/r/20250822212518.4156428-21-dmatlack@google.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>