[for-4.13,v2,0/2] xen/nospec: Add Kconfig options for speculative hardening

Message ID	20191001143207.15844-1-andrew.cooper3@citrix.com (mailing list archive)
Headers	show Return-Path: <SRS0=k/ot=X2=lists.xenproject.org=xen-devel-bounces@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AA5D92070B Received-SPF: None (esa3.hc3370-68.iphmx.com: no sender authenticity information available from domain of andrew.cooper3@citrix.com) identity=pra; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="Andrew.Cooper3@citrix.com"; x-sender="andrew.cooper3@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa3.hc3370-68.iphmx.com: domain of Andrew.Cooper3@citrix.com designates 162.221.158.21 as permitted sender) identity=mailfrom; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="Andrew.Cooper3@citrix.com"; x-sender="Andrew.Cooper3@citrix.com"; x-conformance=sidf_compatible; x-record-type="v=spf1"; x-record-text="v=spf1 ip4:209.167.231.154 ip4:178.63.86.133 ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4 ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88 ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ~all" Received-SPF: None (esa3.hc3370-68.iphmx.com: no sender authenticity information available from domain of postmaster@mail.citrix.com) identity=helo; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="Andrew.Cooper3@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: nrReZ/hhV1ob2rWvAjhYLPPK4y3hvFFG2HlvZAkQhqC8qBiXHjYupI6kQCNFoE4tnm66uDP7I+ KQ/X5qQhfGn9cSiEJrWCS2P7vTZv6WX5T/VgEKraBzt3BeG4odhAe/HAHdD22BF90DCwnXOzPb ADdZPVsvD5cHTLbqqauARsVPYbOifpsbXgwRaDF99LndKUWi5EWNiuS14G+VbvcjwGiU2QMDJs T8bQt4SrLZdYisKQUoSO1H+yfDtDgRodgGeoCg+OfHhzDCsaabvm8pq3KmdDtBzpBJ/umaC6NJ yOQ= From: Andrew Cooper <andrew.cooper3@citrix.com> To: Xen-devel <xen-devel@lists.xenproject.org> Date: Tue, 1 Oct 2019 15:32:05 +0100 Message-ID: <20191001143207.15844-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Subject: [Xen-devel] [PATCH for-4.13 v2 0/2] xen/nospec: Add Kconfig options for speculative hardening Precedence: list Cc: Juergen Gross <jgross@suse.com>, Wei Liu <wl@xen.org>, Andrew Cooper <andrew.cooper3@citrix.com>, Norbert Manthey <nmanthey@amazon.de>, Jan Beulich <JBeulich@suse.com>, =?utf-8?q?Roger_Pau_Monn=C3=A9?= <roger.pau@citrix.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" <xen-devel-bounces@lists.xenproject.org>
Series	xen/nospec: Add Kconfig options for speculative hardening \| expand [for-4.13,v2,0/2] xen/nospec: Add Kconfig options for speculative hardening [v2,1/2] xen/nospec: Introduce CONFIG_SPECULATIVE_HARDEN_ARRAY [v2,2/2] xen/nospec: Introduce CONFIG_SPECULATIVE_HARDEN_BRANCH and disable it

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20191001143207.15844-1-andrew.cooper3@citrix.com (mailing list archive)

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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Date: Tue, 1 Oct 2019 15:32:05 +0100
Message-ID: <20191001143207.15844-1-andrew.cooper3@citrix.com>
MIME-Version: 1.0
Subject: [Xen-devel] [PATCH for-4.13 v2 0/2] xen/nospec: Add Kconfig options
 for speculative hardening
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 Andrew Cooper <andrew.cooper3@citrix.com>,
 Norbert Manthey <nmanthey@amazon.de>, Jan Beulich <JBeulich@suse.com>,
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Series

xen/nospec: Add Kconfig options for speculative hardening | expand

Message

Andrew Cooper Oct. 1, 2019, 2:32 p.m. UTC

The main purpose is patch 2.  The "l1tf-barrier" work currently causes a perf
hit and gains no safety, and is therefore unfit for inclusion into Xen 4.13 at
this time.

See individual patches for changes from v1.

Andrew Cooper (2):
  xen/nospec: Introduce CONFIG_SPECULATIVE_HARDEN_ARRAY
  xen/nospec: Introduce CONFIG_SPECULATIVE_HARDEN_BRANCH and disable it

 docs/misc/xen-command-line.pandoc |  8 +------
 xen/arch/x86/spec_ctrl.c          | 17 ++-------------
 xen/common/Kconfig                | 45 +++++++++++++++++++++++++++++++++++++++
 xen/include/asm-x86/cpufeatures.h |  2 +-
 xen/include/asm-x86/nospec.h      |  6 +++---
 xen/include/asm-x86/spec_ctrl.h   |  1 -
 xen/include/xen/nospec.h          |  5 +++++
 7 files changed, 57 insertions(+), 27 deletions(-)