From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Bader Subject: Re: Xen HVM regression on certain Intel CPUs Date: Thu, 28 Mar 2013 17:12:56 +0100 Message-ID: <51546C08.5040900@canonical.com> References: <51545C7D.2040608@canonical.com> <515464DA.90405@zytor.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7782009570299385618==" Return-path: In-Reply-To: <515464DA.90405@zytor.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: "H. Peter Anvin" Cc: "xen-devel@lists.xensource.com" , Konrad Rzeszutek Wilk , wei.y.yang@intel.com, haitao.shan@intel.com, Keir Fraser , xin.li@intel.com List-Id: xen-devel@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============7782009570299385618== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="------------enigBF7136FBD75F01513C5BD148" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigBF7136FBD75F01513C5BD148 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 28.03.2013 16:42, H. Peter Anvin wrote: > On 03/28/2013 08:06 AM, Stefan Bader wrote: >> >> No you are completely right. The inverse boolean got me for good. >> So to summarize: >> >> - smep=3D0 as hypervisor argument avoids the problem for all guests - >> nosmep as hvm guest arguement avoids the problem for that guest - >> /proc/cpuinfo correctly reflects whether smep has been masked off >> or not >> >=20 > Please try to patch Jan pointed to. I did, but it did not work. Elaborating on it a bit more in the reply I w= rote to his mail. In short, I think the code that would clear smep is not reached= =2E -Stefan >=20 > -hpa >=20 >=20 --------------enigBF7136FBD75F01513C5BD148 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iQIcBAEBCgAGBQJRVGwIAAoJEOhnXe7L7s6jkukP/0bXMHOQsrj0nudKX8PHUAuG qUkXQSKr6PI54glt0EJL3LlxmiMBOpTXJ1G+B+k32AHmuypHm61/HbCrsIxN4S4y CNvHaUm7kE5fmR6aODnO9xUQWjgzioOU+tKE6pjRgaJ0LSIHbLXkmv8qxtYLBeB6 V8cBF0srMucpgiq1zslw3gjJz79MIpMqTkcoImq6YBe0ZiCNDmIFvtOJTiLurkmI 8NmXC7MXwp76C4H+gQAJC5rZt/ZlrNCV5bGJQjWDY2aJ/ptxAGhfrRMyyPuWnOFG lZVqMV6tTyauoud0NGpsYVcsFG2uaTDcOh2XbOOfIHVVctTtgFpUpREmtkHETRWf 0s5kww+Il3DDqhLS2FPtmgzDRyjAVrTaEaCpg/CxF0n0z5eJN6pvHEinTl/FlP3J Glat3mmh1nxOKInAyWUjLBIWHhvxD4Q/jeMf9H1d0y7qVbgrJJT5mjadFcuxHI+f HqLub0dGj8rWaf6CX5qWQaAvE752IJlXc1cFp6rxDYFb3Ahhp4+9V1+L9LGykfGN oWgz8cIO21Ptemk4poKIfVwAoE27FS05gqIaLfhw5DcROrNz9+lNgnLONufM8xgk ZwIYQ6fVljM3o5XTzm8bGrq3UO7CGJ5oKZutHAvAMBJPiisJtDZeB2iFNZOxXZwQ mkJ2mPf5UUN0ibqJqm9/ =0ugP -----END PGP SIGNATURE----- --------------enigBF7136FBD75F01513C5BD148-- --===============7782009570299385618== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel --===============7782009570299385618==--