linux-kernel - RE: [PATCH] flush icache before set_pte take6. [4/4] optimization for cpus other than montecito

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 31 Jul 2007 09:44:35 -0700
From:	"Luck, Tony" <tony.luck@...el.com>
To:	"David Mosberger-Tang" <dmosberger@...il.com>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Cc:	"LKML" <linux-kernel@...r.kernel.org>,
	<linux-ia64@...r.kernel.org>, <Zoltan.Menyhart@...l.net>,
	"Christoph Lameter" <clameter@....com>
Subject: RE: [PATCH] flush icache before set_pte take6. [4/4] optimization for cpus other than montecito

> This seems crazy to me.  Flushing should occur according to the
> *architecture*, not model-by-model.  Even if we happen to get "lucky"
> on pre-Montecito CPUs, that doesn't justify such ugly hacks.  Or you
> really want to debug this *again* come next CPU?

Ditto.  The only reason we should ever have model specific checks should
be to work around model specific errata (e.g. the McKinley Errata #9 code
in patch.c).

-Tony
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/