From patchwork Fri Sep 23 07:33:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chenyi Qiang X-Patchwork-Id: 12986253 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 771ACC6FA82 for ; Fri, 23 Sep 2022 07:26:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230138AbiIWH0j (ORCPT ); Fri, 23 Sep 2022 03:26:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229839AbiIWH0i (ORCPT ); Fri, 23 Sep 2022 03:26:38 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0C6412B4B5 for ; Fri, 23 Sep 2022 00:26:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663917997; x=1695453997; h=from:to:cc:subject:date:message-id; bh=eJE+V/zd8eDJl9FgeFYELSaFkFMlAz8LS3Mil0zjLFo=; b=hCJ+yRFX7xFaZvhjhdqDvMt2tIsqb5xa+heGqeZp0lRCibKCJnFcjCjp NlyupL9caZVUD30iGbiDFvaaS0oRvuvaMb/Rko6zHjibp2U3F1RFthIoA YBfLfhaDqBwKVAXb5XyXxHy0S6SQXPUKBmSZH/8amp6nM/OHqn26XeMHW kVjSjS/pH4eAyez8HbSUZaPSG7+V+OePD2sL7nHw2hFTR/R9DSqLUxeqj sVib4w3GH5/6DIEogsbcUZ0d3CzPEdyYflsVlRBZl5Bmb60XnOINELNo0 NYrGzAHy5ksaeKe0CaV96De99+jodGyEPLS8vDOxOtFvB4Sy/iPUECuxs w==; X-IronPort-AV: E=McAfee;i="6500,9779,10478"; a="287646911" X-IronPort-AV: E=Sophos;i="5.93,337,1654585200"; d="scan'208";a="287646911" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 00:26:37 -0700 X-IronPort-AV: E=Sophos;i="5.93,337,1654585200"; d="scan'208";a="620121665" Received: from chenyi-pc.sh.intel.com ([10.239.159.53]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 00:26:35 -0700 From: Chenyi Qiang To: Paolo Bonzini , Marcelo Tosatti , Richard Henderson , Eduardo Habkost , Peter Xu , Xiaoyao Li Cc: Chenyi Qiang , qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH v7 0/2] Enable notify VM exit Date: Fri, 23 Sep 2022 15:33:31 +0800 Message-Id: <20220923073333.23381-1-chenyi.qiang@intel.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Notify VM exit is introduced to mitigate the potential DOS attach from malicious VM. This series is the userspace part to enable this feature through a new KVM capability KVM_CAP_X86_NOTIFY_VMEXIT. The detailed info can be seen in Patch 2. The corresponding KVM support can be found in linux 6.0-rc: (2f4073e08f4c KVM: VMX: Enable Notify VM exit) This patch set depends on some definition which can be updated from scripts/update-linux-headers.sh. The corresponding separate patch set is available at: https://lists.gnu.org/archive/html/qemu-devel/2022-09/msg02102.html --- Change logs: v6 -> v7 - Add a warning message when exiting to userspace (Peter Xu) - v6: https://lore.kernel.org/all/20220915092839.5518-1-chenyi.qiang@intel.com/ v5 -> v6 - Add some info related to the valid range of notify_window in patch 2. (Peter Xu) - Add the doc in qemu-options.hx. (Peter Xu) - v5: https://lore.kernel.org/qemu-devel/20220817020845.21855-1-chenyi.qiang@intel.com/ v4 -> v5 - Remove the assert check to avoid the nop in NDEBUG case. (Yuan) - v4: https://lore.kernel.org/qemu-devel/20220524140302.23272-1-chenyi.qiang@intel.com/ v3 -> v4 - Add a new KVM cap KVM_CAP_TRIPLE_FAULT_EVENT to guard the extension of triple fault event save&restore. - v3: https://lore.kernel.org/qemu-devel/20220421074028.18196-1-chenyi.qiang@intel.com/ --- Chenyi Qiang (2): i386: kvm: extend kvm_{get, put}_vcpu_events to support pending triple fault i386: Add notify VM exit support hw/i386/x86.c | 45 ++++++++++++++++++++++++++++++++++++ include/hw/i386/x86.h | 5 ++++ qemu-options.hx | 10 +++++++- target/i386/cpu.c | 1 + target/i386/cpu.h | 1 + target/i386/kvm/kvm.c | 54 +++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 115 insertions(+), 1 deletion(-)