linux-kernel - Re: [PATCH] alpha: fix FEN fault handling

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Message-ID: <Y7nj80buxCO3u69l@ZenIV>
Date:   Sat, 7 Jan 2023 21:28:19 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Richard Henderson <rth@...ddle.net>
Cc:     linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] alpha: fix FEN fault handling

On Sat, Jan 07, 2023 at 02:46:26AM +0000, Al Viro wrote:

> Not sure it's worth bothering with in palcode-clipper - for Linux it's
> useless (run out of timeslice and FEN will end up set, no matter what),
> nothing in NetBSD or OpenBSD trees generates that call_pal, current
> FreeBSD doesn't support alpha and their last version to do so hadn't
> generated that call_pal either...  What else is out there?  OSF?

BTW, out of curiosity - what was
              case 5: /* illoc */
              default: /* unexpected instruction-fault type */
about in that switch in do_entIF()?

All documentation I'd been able to find had only 0..4 as expected
values (bpt/bugcheck/gentrap/fen/opdec)...