23ec6e880e
According env setting HSA_XNACK=1 or 0, set XNACK mode ON or OFF to run KFDSVMRangeTest and KFDSVMEvictTest. If HSA_XNACK is not defined, use system boot-time XNACK mode setting. Restore to the original XNACK mode when test finished. Change-Id: Ia896a1b0a90854646c8a79acca38a7d46098efde Signed-off-by: Philip Yang <Philip.Yang@amd.com>