From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: New 745x errata From: Adrian Cox To: Tom Rini Cc: linuxppc-dev@lists.linuxppc.org In-Reply-To: <20031114162414.GD13003@ip68-0-152-218.tc.ph.cox.net> References: <1068721518.23764.84.camel@newt> <20031114162414.GD13003@ip68-0-152-218.tc.ph.cox.net> Content-Type: text/plain Date: 17 Nov 2003 14:57:53 +0000 Message-Id: <1069081074.10537.16.camel@newt> Mime-Version: 1.0 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Fri, 2003-11-14 at 16:24, Tom Rini wrote: > On Thu, Nov 13, 2003 at 11:05:17AM +0000, Adrian Cox wrote: > > 1) The BTIC doesn't work reliably: it can cause execution of corrupted > > instructions. (This is listed in the errata for the 7450 and 7457, but > > not for the 7455. I'll only believe that the 7455 escaped this bug if I > > hear confirmation out of Motorola.) > > I've done the opposite in something I've been waiting for 2.4.24-pre to > come out to fix. But I agree that it is odd that it's not listed on the > 7455. Still no word back from Motorola on the 7455. I think your patch should go in. Any opinion on the dcbt issue? It looks like it could provide a way for a malicious userspace application to crash the machine, though it needs a combination of: 1) good timing 2) a peripheral that would be confused by an extra read cycle - Adrian Cox http://www.humboldt.co.uk/ ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/