From patchwork Mon May 29 17:30:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Zhi A" X-Patchwork-Id: 768064 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wbqv220Hqz9s65 for ; Mon, 29 May 2017 18:40:30 +1000 (AEST) Received: from localhost ([::1]:47485 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dFGDz-0002Ur-UJ for incoming@patchwork.ozlabs.org; Mon, 29 May 2017 04:40:27 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57134) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dFG7K-0005sy-3U for qemu-devel@nongnu.org; Mon, 29 May 2017 04:33:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dFG7J-00059Y-5h for qemu-devel@nongnu.org; Mon, 29 May 2017 04:33:34 -0400 Received: from mga02.intel.com ([134.134.136.20]:12385) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dFG7I-0004sQ-S3 for qemu-devel@nongnu.org; Mon, 29 May 2017 04:33:33 -0400 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 May 2017 01:33:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,413,1491289200"; d="scan'208";a="267607942" Received: from inno-nuc.bj.intel.com ([10.238.154.169]) by fmsmga004.fm.intel.com with ESMTP; 29 May 2017 01:33:30 -0700 From: Zhi Wang To: qemu-devel@nongnu.org Date: Tue, 30 May 2017 01:30:41 +0800 Message-Id: <1496079043-26694-12-git-send-email-zhi.a.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1496079043-26694-1-git-send-email-zhi.a.wang@intel.com> References: <1496079043-26694-1-git-send-email-zhi.a.wang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.20 Subject: [Qemu-devel] [RFC 4/6] vfio: Refine GGTT clearing X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kevin.tian@intel.com, daniel.vetter@ffwll.ch, joonas.lahtinen@linux.intel.com, zhenyuw@linux.intel.com, zhiyuan.lv@intel.com, chuanxiao.dong@intel.com, xiong.y.zhang@intel.com, Zhi Wang Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Clear the whole GGTT page tables after the quirk is initialized. Obtain the total size of GGTT and the entry size of one GGTT entry from intel_device_info(). Suggested-by: Xiong Zhang Signed-off-by: Zhi Wang --- hw/vfio/pci-quirks.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c index 5a083c1..618c43c 100644 --- a/hw/vfio/pci-quirks.c +++ b/hw/vfio/pci-quirks.c @@ -1365,7 +1365,7 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr) const struct intel_device_info *info; void *stolen; PCIDevice *lpc_bridge; - int i, ret; + int i, j, ret; uint64_t bdsm_size; uint32_t gmch; uint16_t cmd_orig, cmd; @@ -1570,9 +1570,11 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr) vdev->vbasedev.name); } - for (i = 1; i < vfio_igd_gtt_max(vdev); i += 4) { - vfio_region_write(&vdev->bars[4].region, 0, i, 4); - vfio_region_write(&vdev->bars[4].region, 4, 0, 4); + for (i = 1; i < info->get_gtt_size(gmch); i += info->gtt_entry_size) { + for (j = 0; j < info->gtt_entry_size; j += 4) { + vfio_region_write(&vdev->bars[4].region, 0, i + j, 4); + vfio_region_write(&vdev->bars[4].region, 4, 0, 4); + } } if (pwrite(vdev->vbasedev.fd, &cmd_orig, sizeof(cmd_orig),