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PPC_INTERRUPT_EBB is a new interrupt that will be used to deliver EBB exceptions that had to be postponed because the thread wasn't in problem state at the time the event-based branch was supposed to occur. ISA 3.1 also defines two EBB exceptions: Performance Monitor EBB exception and External EBB exception. They are being added as POWERPC_EXCP_PERFM_EBB and POWERPC_EXCP_EXTERNAL_EBB. PPC_INTERRUPT_EBB will check BESCR bits to see the EBB type that occurred and trigger the appropriate exception. Both exceptions are doing the same thing in this first implementation: clear BESCR_GE and enter the branch with env->nip retrieved from SPR_EBBHR. The checks being done by the interrupt code are msr_pr and BESCR_GE states. All other checks (EBB facility check, BESCR_PME bit, specific bits related to the event type) must be done beforehand. Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Message-Id: <20220225101140.1054160-4-danielhb413@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>