From owner-svn-src-head@freebsd.org Mon Mar 27 09:45:29 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 24210D1FEE2; Mon, 27 Mar 2017 09:45:29 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E81881AD9; Mon, 27 Mar 2017 09:45:28 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v2R9jS1L001042; Mon, 27 Mar 2017 09:45:28 GMT (envelope-from avg@FreeBSD.org) Received: (from avg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v2R9jSov001041; Mon, 27 Mar 2017 09:45:28 GMT (envelope-from avg@FreeBSD.org) Message-Id: <201703270945.v2R9jSov001041@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: avg set sender to avg@FreeBSD.org using -f From: Andriy Gapon Date: Mon, 27 Mar 2017 09:45:28 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r316017 - head/sys/x86/x86 X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Mar 2017 09:45:29 -0000 Author: avg Date: Mon Mar 27 09:45:27 2017 New Revision: 316017 URL: https://svnweb.freebsd.org/changeset/base/316017 Log: add SMT detection for newer AMD processors The change seems to be more in the nomenclature than in the way the topology is advertised by the hardware. Tested by: truckman (earlier version of the change) MFC after: 2 weeks Modified: head/sys/x86/x86/mp_x86.c Modified: head/sys/x86/x86/mp_x86.c ============================================================================== --- head/sys/x86/x86/mp_x86.c Mon Mar 27 08:29:46 2017 (r316016) +++ head/sys/x86/x86/mp_x86.c Mon Mar 27 09:45:27 2017 (r316017) @@ -255,6 +255,22 @@ topo_probe_amd(void) pkg_id_shift = mask_width((cpu_procinfo2 & AMDID_CMP_CORES) + 1); + /* + * Families prior to 16h define the following value as + * cores per compute unit and we don't really care about the AMD + * compute units at the moment. Perhaps we should treat them as + * cores and cores within the compute units as hardware threads, + * but that's up for debate. + * Later families define the value as threads per compute unit, + * so we are following AMD's nomenclature here. + */ + if ((amd_feature2 & AMDID2_TOPOLOGY) != 0 && + CPUID_TO_FAMILY(cpu_id) >= 0x16) { + cpuid_count(0x8000001e, 0, p); + share_count = ((p[1] >> 8) & 0xff) + 1; + core_id_shift = mask_width(share_count); + } + if ((amd_feature2 & AMDID2_TOPOLOGY) != 0) { for (i = 0; ; i++) { cpuid_count(0x8000001d, i, p);