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Add a new LKDTM trigger (PPC_RADIX_TLBIEL) that executes a process-scoped radix TLBIEL instruction to exercise the radix MMU behaviour and associated machine check exception (MCE) handling paths. This provides a way to validate MCE handling in radix mode. Currently, there is no dedicated LKDTM test that exercises this path or allows triggering radix-specific machine check behaviour for validation. The test is only enabled on ppc64 systems with radix MMU support and If radix is not active, the trigger is skipped and reported as XFAIL. Co-developed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Signed-off-by: Sayali Patil <sayalip@linux.ibm.com> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Reviewed-by: Michael Ellerman <mpe@kernel.org> Link: https://patch.msgid.link/85c9b59217bcecb3c7af52e9d5b175266771d7de.1778975974.git.sayalip@linux.ibm.com Signed-off-by: Kees Cook <kees@kernel.org> |
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