From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga03.intel.com ([134.134.136.65]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1fC9eG-00085g-JU for speck@linutronix.de; Fri, 27 Apr 2018 22:07:17 +0200 Subject: [MODERATED] Re: [PATCH v2] Linux Patch 1/1 References: <92c45587-5eb3-2421-6fc1-42e74a715e30@linux.intel.com> <20180427164743.GA14180@pd.tnic> <6e2b14fc-3bf6-071d-6ce2-e518f2c4f069@redhat.com> <20180427173221.GB14180@pd.tnic> <20180427180944.GD75137@tassilo.jf.intel.com> <85e5e716-bd80-30f5-d4fe-a9bf0601e6d8@linux.intel.com> <07ad1696-ef36-27ba-67b9-150f1d33b5e5@redhat.com> From: Tim Chen Message-ID: <68e32aae-dd85-ec17-e06d-3c96bd83b6fa@linux.intel.com> Date: Fri, 27 Apr 2018 13:07:12 -0700 MIME-Version: 1.0 In-Reply-To: <07ad1696-ef36-27ba-67b9-150f1d33b5e5@redhat.com> Content-Type: multipart/mixed; boundary="FOpb1Mpfrmtfjgo8JyggOiXlM2zcbqxH8"; protected-headers="v1" To: speck@linutronix.de List-ID: This is an OpenPGP/MIME encrypted message (RFC 4880 and 3156) --FOpb1Mpfrmtfjgo8JyggOiXlM2zcbqxH8 Content-Type: multipart/mixed; boundary="XSk5PaFauQG7No3jcExIXpeGJLW3W8yJj" --XSk5PaFauQG7No3jcExIXpeGJLW3W8yJj Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 04/27/2018 12:57 PM, speck for Jon Masters wrote: > On 04/27/2018 03:26 PM, speck for Tim Chen wrote: >> On 04/27/2018 11:30 AM, speck for Linus Torvalds wrote: >>> >>> >>>=20 >=20 >> I'll keep the option in prctl to turn the mitigation off then till we >> find a strong reason to do otherwise. >=20 > Konrad and I are sitting here chatting in my office. We debated the > enumeration for this. Do we think simply calling and getting an EINVAL > on older kernels is ok, or do we need a specific enumeration for the > ability to control SSB from software? An enumeration would be nice. You= > might want to look to how the kernel handles MPX today to indicate > whether the prctl implemented, and also whether runtime supported. >=20 > (he's not got his encrypted email in front of him but he says he'll wor= k > in your update to his patch series if you send it out tonight) >=20 I'll do my best to send an update tonight. Tim --XSk5PaFauQG7No3jcExIXpeGJLW3W8yJj-- --FOpb1Mpfrmtfjgo8JyggOiXlM2zcbqxH8--