selftests/x86/lam: Add inherit test cases for linear-address masking
LAM is enabled per-thread and gets inherited on fork(2)/clone(2). exec() reverts LAM status to the default disabled state. There are two test scenarios: - Fork test cases: These cases were used to test the inheritance of LAM for per-thread, Child process generated by fork() should inherit LAM feature from parent process, Child process can get the LAM mode same as parent process. - Execve test cases: Processes generated by execve() are different from processes generated by fork(), these processes revert LAM status to disabled status. Signed-off-by:Weihong Zhang <weihong.zhang@intel.com> Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
Dave Hansen <dave.hansen@linux.intel.com> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/all/20230312112612.31869-16-kirill.shutemov%40linux.intel.com
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