From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758039Ab3K0WVP (ORCPT ); Wed, 27 Nov 2013 17:21:15 -0500 Received: from mail.skyhub.de ([78.46.96.112]:38285 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757339Ab3K0WVM (ORCPT ); Wed, 27 Nov 2013 17:21:12 -0500 Date: Wed, 27 Nov 2013 23:21:04 +0100 From: Borislav Petkov To: "H. Peter Anvin" Cc: Linus Torvalds , Andy Lutomirski , Andi Kleen , Linux Kernel Mailing List , Ingo Molnar , Andi Kleen , Thomas Gleixner Subject: Re: [PATCH] Add a text_poke syscall v2 Message-ID: <20131127222104.GA748@pd.tnic> References: <1385426236-14960-1-git-send-email-andi@firstfloor.org> <5294F10C.8060901@amacapital.net> <52964EC7.9000504@zytor.com> <52966C0A.7070201@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <52966C0A.7070201@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 27, 2013 at 02:02:50PM -0800, H. Peter Anvin wrote: > For the record, this is the entire patch necessary to do the > sync_cores() system call -- and no potential interactions with security > frameworks or whatnot, simply because no security-sensitive operations > are performed of any kind. > > Comments/opinions appreciated. And we do this in the kernel not because userspace can't execute sync_core() aka CPUID but because for userspace it is hard to IPI all cores easily? -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --