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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=gmail.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935589AbeCHRB7 (ORCPT ); Thu, 8 Mar 2018 12:01:59 -0500 Received: from mail-wr0-f195.google.com ([209.85.128.195]:36677 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932076AbeCHRB5 (ORCPT ); Thu, 8 Mar 2018 12:01:57 -0500 X-Google-Smtp-Source: AG47ELvfaxWAsRW0tZzmLBPdxRJHIS44Pmpw8Zrlst/mpYNBaBvCRJ5FRgf3aUqcNRHOxvJ9oBVoGg== Date: Thu, 8 Mar 2018 18:01:53 +0100 From: Pali =?utf-8?B?Um9ow6Fy?= To: Marc Zyngier Cc: Pavel Machek , Alex Shi , sre@kernel.org, linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com, clayton@craftyguy.net, martijn@brixit.nl, sakari.ailus@linux.intel.com, Filip =?utf-8?Q?Matijevi=C4=87?= , Will Deacon , Ard Biesheuvel , Catalin Marinas , stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 00/45] arm Spectre fix backport review for LTS 4.9 Message-ID: <20180308170153.376gcwwudwkq3gs7@pali> References: <1519908862-11425-1-git-send-email-alex.shi@linaro.org> <20180308122715.GB21514@amd> <20180308132139.apabmgw4magrp3d7@pali> <07d4709b-df73-0107-ce0f-5af55e34913e@arm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="xkebunayz44ustzl" Content-Disposition: inline In-Reply-To: <07d4709b-df73-0107-ce0f-5af55e34913e@arm.com> User-Agent: NeoMutt/20170113 (1.7.2) 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: --xkebunayz44ustzl Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thursday 08 March 2018 13:35:49 Marc Zyngier wrote: > On 08/03/18 13:21, Pali Roh=C3=A1r wrote: > > On Thursday 08 March 2018 13:27:15 Pavel Machek wrote: > >> Hi! > >> > >>> Resent without non-upstream patches. > >>> > >>> This backport patchset fixed the spectre issue, it's original branch: > >>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?= h=3Dkpti > >>> A few dependency or fixingpatches are also picked up, if they are nec= essary > >>> and no functional changes. > >>> > >>> No bug found from kernelci.org and lkft testing. It also could be got= ten from: > >>> > >>> git://git.linaro.org/kernel/linux-linaro-stable.git v4.9-spectre-upst= ream-only > >>> > >>> Comments are appreciated! > >> > >> Not entirely related to this patched, but... I have few older ARM > >> boards here, and Nokia N9000 I really care about. > >> > >> AFAICT Meltdown is arm64 only? > >=20 > > IIRC ARMv7 is not affected by meltdown. > >=20 > >> Spectre affects the older boards, too, right? Was there any work done > >> on that? cpuinfo says "ARMv7" for N900. > >=20 > > I remember that I saw some spectre patches for ARMv7 on LKML. This is that patch series: https://www.spinics.net/lists/arm-kernel/msg632065.html > > In general for ARMv7 it is problematic as mitigation needs to change IBE >=20 > Not quite. IBE is part of ACTLR, which is an implementation defined > register, so generalizing this statement to "ARMv7" is plain wrong. Case > in point: A9, A12/A17 do not need any bit to be set. A8 needs IBE to > allow BPIALL to work, A15 needs it for ICIALLUI to perform a BP > invalidation. Ok, Nokia N900 has Cortex A8. --=20 Pali Roh=C3=A1r pali.rohar@gmail.com --xkebunayz44ustzl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQS4VrIQdKium2krgIWL8Mk9A+RDUgUCWqFsfgAKCRCL8Mk9A+RD UsW0AJ99fseDeZ/ryk68VFMT4t/bAcrRpACeP5hLbA3/wfZZ80zRd7UwHmHFcwY= =x89Z -----END PGP SIGNATURE----- --xkebunayz44ustzl--