From mboxrd@z Thu Jan 1 00:00:00 1970 From: Diederik de Haas Subject: Re: Is: EPT violations. Was:Re: Problems with pci/vga passthrough Date: Tue, 24 Jan 2017 19:44:48 +0100 Message-ID: <55013379.QGovEA7yDG@bagend> References: <3650332.PVtMSBxIKa@bagend> <58878ABA020000780013373E@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============5603019039478384718==" Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: xen-devel@lists.xen.org Cc: Boris Ostrovsky , 852324@bugs.debian.org, Jan Beulich List-Id: xen-devel@lists.xenproject.org --===============5603019039478384718== Content-Type: multipart/signed; boundary="nextPart2779110.EzTAKv1XJN"; micalg="pgp-sha512"; protocol="application/pgp-signature" --nextPart2779110.EzTAKv1XJN Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" On dinsdag 24 januari 2017 13:28:28 CET Boris Ostrovsky wrote: > >> Reported it at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=852324 > >> but given Ben Hutchings' reaction it seems to be a Xen problem after > >> all. > >> > >> Relevant part of earlier attached dmesg: > >> > >> [ 13.588386] WARNING: CPU: 18 PID: 1 at > >> /build/linux-zDY19G/linux-4.8.15/arch/x86/mm/dump_pagetables.c:225 > >> note_page+0x5e8/0x790 [ 13.588388] x86/mm: Found insecure W+X mapping > >> at address ffff880000000000/0xffff880000000000 ... > >> [ 13.608867] x86/mm: Checked W+X mappings: FAILED, 4602 W+X pages > >> found. > > > > Now this is a know issue, but I'm pretty convinced one that's entirely > > unrelated to your problem. > > I thought we fixed this. That's what is_hypervisor_range() was > introduced for, and I haven't seen this warning since then. When? Which commit? Maybe it isn't (yet) in the Debian tree and/or I am using a kernel which doesn't contain that fix. --nextPart2779110.EzTAKv1XJN Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEf+PJh5LtCd6LDwjYE45BkVx+/tYFAliHoKAACgkQE45BkVx+ /tYj0w//V9Pu0qm2g6lvBmn7eBqoj56Ytw+HQDEi9FYGms3qkaN5Y35gq7bRxw2O epdyj1iaRvPJzviJxZyXkEq0Oc8q+BZfVh+0OJzmUiJZzGYNwnIbwnQFkwrMLifL R4HrU622bP8/s6RrygWQEl0Ken7iiVOcZpc4HAxegXA90gVrfOa/dYqFD/9LAaOu ebXj3vYthckKpdntWq+WQdlGBNhYGms0NkXxv1hRQ5OoEphHsPfRY3DjD7qkQSwU eWTGErk1K39kEsWAPmUcZckwcOjzojEkipox8C0x6irHvAae5omvJJerqZ8eG4PK j+ws/DO+ocCUiixkwD07Jmmxy5cNaaTvyuB3M4Ls1y2dTcyiKSqu8yBTt9OP7oDZ IguXhIbToXPZpSdozj00AfrkIuAskdSdgU8x6YNI1L4MhEcNJMDT7q3zCm0/3Cr3 x/tWbt4BJQgb2dLEIWWrnDKh6bys1T/4fNb5IAUsclMwfew3QQDatjPak6va37c1 kdkpn+TzcAekHEuEt8iUdIAJnerV4L7FfbcfRd5/azdEMHneY5RmMmBFh0LbgAi7 EB+S6qAMbrYtoj9/viAEieJIGSk9koUfYwjRTuMQu8liqqLBniUu34haY3J+t7Ib Rl8EFaoOQC94bPdV8CBlSfPQDWsOHnBUMtq2J8RVVbP160QKC84= =M+K4 -----END PGP SIGNATURE----- --nextPart2779110.EzTAKv1XJN-- --===============5603019039478384718== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg== --===============5603019039478384718==--