From patchwork Thu Apr 30 08:13:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Yan Zhao X-Patchwork-Id: 1280050 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=2001:470:142::17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:470:142::17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49CT0j4wSjz9sSM for ; Thu, 30 Apr 2020 18:23:17 +1000 (AEST) Received: from localhost ([::1]:40338 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jU4TS-0007cU-Ej for incoming@patchwork.ozlabs.org; Thu, 30 Apr 2020 04:23:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41022) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jU4TC-0007c9-F8 for qemu-devel@nongnu.org; Thu, 30 Apr 2020 04:22:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jU4TB-0001tx-RD for qemu-devel@nongnu.org; Thu, 30 Apr 2020 04:22:58 -0400 Received: from mga05.intel.com ([192.55.52.43]:53988) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jU4TB-0001tn-AJ for qemu-devel@nongnu.org; Thu, 30 Apr 2020 04:22:57 -0400 IronPort-SDR: sK1H+wDbanb6v1xiQoo0pxh5unhS0bBmxQQUKVR7Y8ED6WdN4WsU8bydhMlq+OS9h1lrQPYJ7j 08jipi0Nan1g== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Apr 2020 01:22:55 -0700 IronPort-SDR: BB/YkbjgCS7MSD/zRHMjwcdqejlAWPErR/rsiva5vycjiH3kFwmShaGEvYOvljy9LMl5qkPzEX 2P7i24tcS4EQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,334,1583222400"; d="scan'208";a="282784801" Received: from joy-optiplex-7040.sh.intel.com ([10.239.13.16]) by fmsmga004.fm.intel.com with ESMTP; 30 Apr 2020 01:22:53 -0700 From: Yan Zhao To: pbonzini@redhat.com, alex.williamson@redhat.com Subject: [PATCH v6 2/3] hw/vfio: drop guest writes to ro regions Date: Thu, 30 Apr 2020 04:13:04 -0400 Message-Id: <20200430081304.31346-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200430080744.31232-1-yan.y.zhao@intel.com> References: <20200430080744.31232-1-yan.y.zhao@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.43; envelope-from=yan.y.zhao@intel.com; helo=mga05.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/30 04:22:55 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Received-From: 192.55.52.43 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yan Zhao , xin.zeng@intel.com, philmd@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" for vfio regions that are without write permission, drop guest writes to those regions. Cc: Philippe Mathieu-Daudé Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Yan Zhao Signed-off-by: Xin Zeng --- hw/vfio/common.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 0b3593b3c0..2a4fedfeaa 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -38,6 +38,7 @@ #include "sysemu/reset.h" #include "trace.h" #include "qapi/error.h" +#include "qemu/log.h" VFIOGroupList vfio_group_list = QLIST_HEAD_INITIALIZER(vfio_group_list); @@ -190,6 +191,16 @@ void vfio_region_write(void *opaque, hwaddr addr, uint64_t qword; } buf; + trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size); + if (!(region->flags & VFIO_REGION_INFO_FLAG_WRITE)) { + qemu_log_mask(LOG_GUEST_ERROR, + "Invalid write to read only vfio region (%s:region%d" + "+0x%"HWADDR_PRIx" size %d)\n", vbasedev->name, + region->nr, addr, size); + + return; + } + switch (size) { case 1: buf.byte = data; @@ -215,8 +226,6 @@ void vfio_region_write(void *opaque, hwaddr addr, addr, data, size); } - trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size); - /* * A read or write to a BAR always signals an INTx EOI. This will * do nothing if not pending (including not in INTx mode). We assume