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Some CPUs can operate in a mode where TM (Transactional Memory) is enabled but the suspended state of TM is disabled. In this mode tsuspend does not enter suspended state, instead the transaction is aborted. Similarly any other event that would lead to suspended state instead aborts the transaction. There is also an ABI change, in that in this mode processes are not allowed to sigreturn with an MSR that would lead to suspended state, Linux will instead return an error to the sigreturn syscall. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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