From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HK_RANDOM_FROM,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30933C33C9E for ; Thu, 30 Jan 2020 12:24:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0149A215A4 for ; Thu, 30 Jan 2020 12:24:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727158AbgA3MYs (ORCPT ); Thu, 30 Jan 2020 07:24:48 -0500 Received: from mga07.intel.com ([134.134.136.100]:49436 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726902AbgA3MYr (ORCPT ); Thu, 30 Jan 2020 07:24:47 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jan 2020 04:24:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,381,1574150400"; d="scan'208";a="262155240" Received: from lxy-dell.sh.intel.com ([10.239.13.109]) by fmsmga002.fm.intel.com with ESMTP; 30 Jan 2020 04:24:44 -0800 From: Xiaoyao Li To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Paolo Bonzini , Sean Christopherson Cc: Xiaoyao Li , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH 0/2] kvm: split_lock: Fix emulator and extend #AC handler Date: Thu, 30 Jan 2020 20:19:37 +0800 Message-Id: <20200130121939.22383-1-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org As kernel split lock patch[1] merged into tip tree, kvm emulator needs to be fixed and vmx's #AC handler needs to be extended. Patch 1 fixes x86/emulator to emualte split lock access as write to avoid malicous guest[2] exploiting it to populate host kernel log. Patch 2 extends vmx's #AC handler that we can make old guestes (has split_lock buges) survive on certain cases. [1] https://lore.kernel.org/lkml/158031147976.396.8941798847364718785.tip-bot2@tip-bot2/ [2] https://lore.kernel.org/lkml/8c5b11c9-58df-38e7-a514-dc12d687b198@redhat.com/ Xiaoyao Li (2): KVM: x86: Emulate split-lock access as a write KVM: VMX: Extend VMX's #AC handding arch/x86/include/asm/cpu.h | 13 ++++++++++++ arch/x86/kernel/cpu/intel.c | 18 ++++++++++------ arch/x86/kvm/vmx/vmx.c | 42 ++++++++++++++++++++++++++++++++++--- arch/x86/kvm/vmx/vmx.h | 3 +++ arch/x86/kvm/x86.c | 11 ++++++++++ 5 files changed, 78 insertions(+), 9 deletions(-) -- 2.23.0