From owner-freebsd-hackers@FreeBSD.ORG Sat May 17 10:13:09 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7FFA2106567E for ; Sat, 17 May 2008 10:13:09 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from anti-4.kiev.sovam.com (anti-4.kiev.sovam.com [62.64.120.202]) by mx1.freebsd.org (Postfix) with ESMTP id D97D08FC15 for ; Sat, 17 May 2008 10:13:08 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from [212.82.216.226] (helo=skuns.kiev.zoral.com.ua) by anti-4.kiev.sovam.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.67) (envelope-from ) id 1JxJPV-000ALp-PS for freebsd-hackers@freebsd.org; Sat, 17 May 2008 13:13:06 +0300 Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by skuns.kiev.zoral.com.ua (8.14.2/8.14.2) with ESMTP id m4HACl0K069896 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 17 May 2008 13:12:47 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.2/8.14.2) with ESMTP id m4HACjUg029350; Sat, 17 May 2008 13:12:45 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.2/8.14.2/Submit) id m4HAChwB029349; Sat, 17 May 2008 13:12:43 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Sat, 17 May 2008 13:12:43 +0300 From: Kostik Belousov To: Andriy Gapon Message-ID: <20080517101243.GH18958@deviant.kiev.zoral.com.ua> References: <482E93C0.4070802@icyb.net.ua> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ejhj5mF8juGI/iew" Content-Disposition: inline In-Reply-To: <482E93C0.4070802@icyb.net.ua> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: ClamAV version 0.91.2, clamav-milter version 0.91.2 on skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.4 X-Spam-Checker-Version: SpamAssassin 3.2.4 (2008-01-01) on skuns.kiev.zoral.com.ua X-Scanner-Signature: 7b1a4900bea4ee3727a65c989d5962bc X-DrWeb-checked: yes X-SpamTest-Envelope-From: kostikbel@gmail.com X-SpamTest-Group-ID: 00000000 X-SpamTest-Header: Not Detected X-SpamTest-Info: Profiles 2835 [May 13 2008] X-SpamTest-Info: helo_type=3 X-SpamTest-Method: none X-SpamTest-Rate: 0 X-SpamTest-Status: Not detected X-SpamTest-Status-Extended: not_detected X-SpamTest-Version: SMTP-Filter Version 3.0.0 [0278], KAS30/Release Cc: freebsd-hackers@freebsd.org Subject: Re: rdmsr from userspace X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 May 2008 10:13:09 -0000 --ejhj5mF8juGI/iew Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 17, 2008 at 11:13:52AM +0300, Andriy Gapon wrote: >=20 > It seems that rdmsr instruction can be executed only at the highest=20 > privilege level and thus is not permitted from userland. Maybe we should= =20 > provide something like Linux /dev/cpu/msr? > I don't like interface of that device, I think that ioctl approach would= =20 > be preferable in this case. > Something like create /dev/cpuN and allow some ioctls on it:=20 > ioctl(cpu_fd, CPU_RDMSR, arg). > What do you think? I believe ports/sysutils/devcpu is what you need. In fact, I think this ought to be committed to the base. I do not know why Stas did not asked for this, at least at public. --ejhj5mF8juGI/iew Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkgur5sACgkQC3+MBN1Mb4hURQCfcnilZbpQqqMmy1xQsPSoZoqA 8qEAoK1OxSCTxAGZ53Jebag6x1Im1S7q =Lcx4 -----END PGP SIGNATURE----- --ejhj5mF8juGI/iew--