From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-381307-1518537777-2-10092418942157006574 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='de', MailFrom='org' X-Spam-charsets: plain='US-ASCII' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1518537776; b=cA4fLmzEc3ziJn3zlh0MHCJbfOQqwSj6CcX6Y9ds/OV/qu0 BADZBUov8rXYy0aj0Ow4SPcvBLogQKuo/lOy2EJpD6Ffv2lVXnMDJTdU4zEYrpw6 JYDuPRIvdaNZufFTThFaIp92v/DyGY4AoK1YmvOj+rOD9U2z0lqfY39g5YXTU8lZ sYspcBj02WNfgig0Z1vkSImEmfmRt4iqW4ZXWUCDXSDGZgqSTncjkketG2D/hJOG iF2TIOTpswCdyhTGme0qnvbKdHAhVUegR9zkYxW9MO2fgTX6kNxYZK8DS8skEGGi 14G4G+WPeXkS0/5Sggdj5/uxyMMCosYZX3T+hTA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:cc:subject:in-reply-to :message-id:references:mime-version:content-type:sender:list-id; s=arctest; t=1518537776; bh=rYhJzo8S238S7gekwyfmHKqlqVBgnC1atyC z/zYzc24=; b=Br3suwrDrf2h4ZApZWu7qVFUJcqcBAGsDdJgDAMKQRCBmz/VYoW r1dkPA+VTAGQoR9DBWviNZndN0CWfL5q08uHIdt0p0AMBGWJtIxKDlBb1ndkwM0H AwpHwbQBU30HbPx3tO/sdqYSyCHUY8f6STn4g3P+PCHfrwJ1nlw+eyVXI5I7W4po fqrT0p50TFgvSlrgiYxhtGcp4pQyW0ZgdEJZH8lcr5jrJX9xdm1xK5zmj9LWsGs4 DAD59wtMlz3lU/q9lpKIx5bPfbZpqtIjzCT7CMxhrVo3PdQrpdEiZu/ppfpqvS0G 2D6itesDvyGA2beN0wUBCVhZknCg2vMrtTw== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linutronix.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linutronix.de header.result=pass header_is_org_domain=yes Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linutronix.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linutronix.de header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933698AbeBMQCz (ORCPT ); Tue, 13 Feb 2018 11:02:55 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:50909 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933927AbeBMQCy (ORCPT ); Tue, 13 Feb 2018 11:02:54 -0500 Date: Tue, 13 Feb 2018 17:02:59 +0100 (CET) From: Thomas Gleixner To: Andi Kleen cc: Arjan van de Ven , Greg Kroah-Hartman , Nick Lowe , linux-kernel@vger.kernel.org, stable@vger.kernel.org, David Woodhouse , Borislav Petkov , Dave Hansen , gnomes@lxorguk.ukuu.org.uk, ashok.raj@intel.com, karahmed@amazon.de, torvalds@linux-foundation.org, peterz@infradead.org, Borislav Petkov , pbonzini@redhat.com, tim.c.chen@linux.intel.com Subject: Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown In-Reply-To: <20180213155603.GK10945@tassilo.jf.intel.com> Message-ID: References: <20180209133931.211869118@linuxfoundation.org> <20180209133934.259299920@linuxfoundation.org> <20180213150007.GJ26982@kroah.com> <20180213155603.GK10945@tassilo.jf.intel.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Tue, 13 Feb 2018, Andi Kleen wrote: > On Tue, Feb 13, 2018 at 07:09:44AM -0800, Arjan van de Ven wrote: > > > > > > So, any hints on what you think should be the correct fix here? > > > > the patch sure looks correct to me, it now has a nice table for CPU IDs > > including all of AMD (and soon hopefully the existing Intel ones that are not exposed to meltdown) > > I don't think the table is nice, it's a white list that would need > to be maintained forever. No. The table is basically excluding families <=5 and a few individual ones. Anything newer than that should tell via ARCH_CAP_RDCL_NO and not need any entry. Thanks, tglx