Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp1811864ybi; Thu, 20 Jun 2019 04:18:22 -0700 (PDT) X-Google-Smtp-Source: APXvYqyd6JPmdhCb+XqzE7NLas4utzi0y6j90Qt+nLykiCKt8PU1X1HhycATca9N4+FKbsiJFgXy X-Received: by 2002:a17:902:7793:: with SMTP id o19mr63531123pll.110.1561029502431; Thu, 20 Jun 2019 04:18:22 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561029502; cv=none; d=google.com; s=arc-20160816; b=mNdS9iMvMv//YmuotChZ95HCxKi43HHp7Gik4Dmv+OCkqKSU1YAsisPq9iwFf0QBkA B9FzY3is63flPHlvRbReMdmAtFsu5FswGGtF8tODHQVUhFoXIueorjEh6mqKG0zYgzGv awpnnCEMMTUcST6dmXdjUNJF2DE0SuTzc7jzC1Kmr05T9OH2OzDr7flrbOWgIFcrW84d XbZyAm9D9pBMdmXiaa3tLPz+YXlzA2jkKj2mZH7qyy+KZvearofBg0MuyBH8lEu03nWR FfCMF3TI0fb7kwwMlgRSzw6+I3RCGRQMlb3VGLNasl4ODlTFLYHuZov/upYx/Cgb+AaK Cj/w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from; bh=6XS9aQpCigNXOVTCf1L6Nvbbkn1fiBT9VdGoKkOaYjo=; b=AjR3kjdHblG/aSqtxEDDAUmkZWyt+jNxXx9Bv39ekD/8CucC7F8koXhOh4GvNTSB9v mH7EKCmDUxtxZnjfuETTiwDxODsV/ywY1E8Fey/qVPcca5+WvGnUsV7B2cocILvEiu77 ILvIopogkp1sLqGMUJ/oZQcn6Bkdn+7gOUbThFgd0XtGv2oJ2J5QQGjeYVolz9zu4jjt Xd8BM2dD60gV0td1YU73+I3Ex0pjVobHPfVgNRqFTFbUI0JlWDeA4pTqid3LRj7uIQbP AMjjm4i0wbUQ+i9dnm38b+RlC0/AxGXWlw5xDLahCu40hNmK47kRNbDzp+Rq8Yj3ewwj LpCQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z2si17384946pln.247.2019.06.20.04.18.06; Thu, 20 Jun 2019 04:18:22 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730886AbfFTLRx (ORCPT + 99 others); Thu, 20 Jun 2019 07:17:53 -0400 Received: from mga03.intel.com ([134.134.136.65]:57760 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726268AbfFTLRx (ORCPT ); Thu, 20 Jun 2019 07:17:53 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jun 2019 04:17:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,396,1557212400"; d="scan'208";a="311627870" Received: from liujing-dell.bj.intel.com ([10.238.145.70]) by orsmga004.jf.intel.com with ESMTP; 20 Jun 2019 04:17:51 -0700 From: Jing Liu To: pbonzini@redhat.com, kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jing2.liu@intel.com, jing2.liu@linux.intel.com Subject: [PATCH RFC] kvm: x86: AVX512_BF16 feature support Date: Thu, 20 Jun 2019 19:21:51 +0800 Message-Id: <1561029712-11848-1-git-send-email-jing2.liu@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch focuses on a new instruction AVX512_BF16 support for kvm guest, defined as CPUID.(EAX=7,ECX=1):EAX[bit 5], see spec[1]. The kvm implementation depends on kernel patch[2] which is in lkml discussion. References: [1] https://software.intel.com/sites/default/files/managed/c5/15/\ architecture-instruction-set-extensions-programming-reference.pdf [2] https://lkml.org/lkml/2019/6/19/912 Jing Liu (1): kvm: x86: Expose AVX512_BF16 feature to guest arch/x86/kvm/cpuid.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) -- 1.8.3.1