Hi All,

I was going through some code in sgi_ras.c and was wondering if the situation mentioned below could cause a deadlock or if i'm missing something. It seems like it is possible to deadlock if we enter MM in S-EL0(say through an MM_COMMUNICATE SMC or perhaps an initial RAS interrupt) followed by a SYNC EA or ASYNC EA on the same core. sgi_ras.c seems like it registers the same handler for both interrupts and aborts. While interrupts can be blocked/masked, SYNC EA's cannot be blocked(not that i know of), and i don't see SErrors being blocked on the path to the EA handler and entry to MM. If this situation does occur, it seems like we could deadlock when the EA attempts to enter MM again in the interrupt handler. Is there something that would prevent this situation from happening?

Thanks Raghu