From: Bob Picco <bpicco@xxxxxxxxxx>
Date: Tue, 16 Sep 2014 09:26:47 -0400
> Normally sun4v_itlb_error_report() and sun4v_dtlb_error_report() would call
> prom_halt() and drop us to OF command prompt "ok". This isn't the case for
> LDOMs and the machine powers off.
>
> For the HV reported error of HV_ENORADDR for HV HV_MMU_MAP_ADDR_TRAP we cause
> a SIGBUS error by qualifying it within do_sparc64_fault() for fault code mask
> of FAULT_CODE_BAD_RA. This is done when trap level (%tl) is less or equal
> one("1"). Otherwise, for %tl > 1, we proceed eventually to die_if_kernel().
This patch is great, applied, thanks Bob.
I think I'd like to request a follow-on patch to this if you don't
mind.
If %tl > 1, the only situation we can possibly be in is to be taking a
TLB miss during a window spill/fill trap, in which case we should
up-trap back up through the spill/fill handler and into the long path
fault code via winfix_trampoline.
Then you can kill all of the {i,d}tlb error code paths.
Thanks!
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