From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: [PATCH for-4.12] passthrough/vtd: Drop the
 "workaround_bios_bug" logic entirely
Date: Wed, 27 Mar 2019 09:41:57 -0600
Message-ID: <5C9B99C502000078002222D2@prv1-mh.provo.novell.com>
References: <1553199980-9849-1-git-send-email-andrew.cooper3@citrix.com>
 <5C98F2A50200007800221B22@prv1-mh.provo.novell.com>
 <5ed95c61-9ede-fd6a-3706-87cab323ac30@citrix.com>
 <5C99EC230200007800221D12@prv1-mh.provo.novell.com>
 <3ad4fc12-e999-3cb5-e560-bb7993d82208@citrix.com>
 <5C9A2BAF0200007800221EDA@prv1-mh.provo.novell.com>
 <0fd617eb-52cd-914f-aff5-3c2de35b081e@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xenproject.org>
In-Reply-To: <0fd617eb-52cd-914f-aff5-3c2de35b081e@citrix.com>
Content-Disposition: inline
List-Unsubscribe: <https://lists.xenproject.org/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xenproject.org>
List-Help: <mailto:xen-devel-request@lists.xenproject.org?subject=help>
List-Subscribe: <https://lists.xenproject.org/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xenproject.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xenproject.org>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Juergen Gross <jgross@suse.com>, Igor Druzhinin <igor.druzhinin@citrix.com>, Kevin Tian <kevin.tian@intel.com>, Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wei.liu2@citrix.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, George Dunlap <George.Dunlap@eu.citrix.com>, Tim Deegan <tim@xen.org>, Lars Kurth <lars.kurth@xenproject.org>, Xen-devel <xen-devel@lists.xen.org>, Julien Grall <julien.grall@arm.com>, Paul Durrant <paul.durrant@citrix.com>, Jun Nakajima <jun.nakajima@intel.com>, Ian Jackson <ian.jackson@citrix.com>, Roger Pau Monne <roger.pau@citrix.com>
List-Id: xen-devel@lists.xenproject.org
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