[v2,0/2] x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown

Message ID	20190726203222.4833-1-andrew.cooper3@citrix.com (mailing list archive)
Headers	show Return-Path: <xen-devel-bounces@lists.xenproject.org> Received-SPF: None (esa2.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=esa2.hc3370-68.iphmx.com; envelope-from="Andrew.Cooper3@citrix.com"; x-sender="andrew.cooper3@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa2.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=esa2.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 (esa2.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=esa2.hc3370-68.iphmx.com; envelope-from="Andrew.Cooper3@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: 2qGDk3Fcpv3iFgZlTq1SQxCz+ePirgQ85xL1K86CoKu8yD11XfOUNatRfJVfiA8XL/gFUaFzqa 5UIEpThnJe+kmOtd/TyG3IHy4zy1VmoOg8w6hSYxe/GJZKSKw9oVQaLfIu62jhe5ULWPCkaqZA A5zX2sscGzOvs81GbaoFWPfMTstr7VPW3IzhYe+ocbJZrUaWmhhV/La+dWqwNTvO5uFXRlFoM8 GD65036jO4osQaFUrLsOzcHIYF2sYuGAqG+x5UnZh1VyoBBv4ic/PGucH+IoIApBA8Z/kNr5MO 6Io= From: Andrew Cooper <andrew.cooper3@citrix.com> To: Xen-devel <xen-devel@lists.xenproject.org> Date: Fri, 26 Jul 2019 21:32:20 +0100 Message-ID: <20190726203222.4833-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v2 0/2] x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown Precedence: list Cc: Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wl@xen.org>, Andrew Cooper <andrew.cooper3@citrix.com>, Julien Grall <julien.grall@arm.com>, Jan Beulich <JBeulich@suse.com>, Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>, =?utf-8?q?Roger_Pau_Monn?= =?utf-8?q?=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	x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown \| expand [v2,0/2] x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown [v2,1/2] xen/link: Introduce .bss.percpu.page_aligned [v2,2/2] x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown

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20190726203222.4833-1-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: Fri, 26 Jul 2019 21:32:20 +0100
Message-ID: <20190726203222.4833-1-andrew.cooper3@citrix.com>
MIME-Version: 1.0
Subject: [Xen-devel] [PATCH v2 0/2] x86/xpti: Don't leak TSS-adjacent percpu
 data via Meltdown
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Cc: Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wl@xen.org>,
 Andrew Cooper <andrew.cooper3@citrix.com>,
 Julien Grall <julien.grall@arm.com>, Jan Beulich <JBeulich@suse.com>,
 Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>, =?utf-8?q?Roger_Pau_Monn?=
	=?utf-8?q?=C3=A9?= <roger.pau@citrix.com>
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x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown | expand

Message

Andrew Cooper July 26, 2019, 8:32 p.m. UTC

Reworked to allow DEFINE_PER_CPU_PAGE_ALIGNED() to specify the
__aligned(PAGE_SIZE) itself.

Andrew Cooper (2):
  xen/link: Introduce .bss.percpu.page_aligned
  x86/xpti: Don't leak TSS-adjacent percpu data via Meltdown

 xen/arch/arm/xen.lds.S          |  5 +++--
 xen/arch/x86/setup.c            |  3 ---
 xen/arch/x86/traps.c            |  6 ++++++
 xen/arch/x86/xen.lds.S          |  7 +++++--
 xen/include/asm-arm/percpu.h    |  6 ++----
 xen/include/asm-x86/percpu.h    |  6 ++----
 xen/include/asm-x86/processor.h |  4 ++--
 xen/include/xen/percpu.h        | 10 ++++++++--
 8 files changed, 28 insertions(+), 19 deletions(-)