From nobody Fri Jan 2 15:11:30 2026 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 188D6CD8CBF for ; Wed, 11 Oct 2023 08:45:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345661AbjJKIo7 (ORCPT ); Wed, 11 Oct 2023 04:44:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345529AbjJKIow (ORCPT ); Wed, 11 Oct 2023 04:44:52 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9133D94 for ; Wed, 11 Oct 2023 01:44:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697013887; x=1728549887; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lpncFO9EBL1O72rF23q9xrrFLTa4Sw3ZpdC9K4pRN7g=; b=W0TwkHjGAGq5U1GmxATVtn0Eqo7A9AILwxYR+X9nZRTMGKXkfP8P++gv GRpHE6lxKa8KLZc7WWKWVAOapqlCj4rmw5DKp+l5/4kz//X/2O2bU7i4l 5VW1GlK/miin5kKWqrXhS4RXT8C8QanotEpP0D2v4LigUBap07h+vRi9G ps8H8MLy/ohCg9Fo+PF07jgdG+7R2v5EWqCGa8GhiBCv86Im84zOYPiz8 fBpxc8Tl5AHj50rRhF8EhVtg1/qy1nZ3dJfKIeevNFHjHtZw4TWwGME1A aTioDO1WXsEGEnuaUrrUjSdSPJIdRtos/6PWIK9eSwYI5mqiZWODhxqwl Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10859"; a="383474569" X-IronPort-AV: E=Sophos;i="6.03,214,1694761200"; d="scan'208";a="383474569" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Oct 2023 01:44:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10859"; a="877587371" X-IronPort-AV: E=Sophos;i="6.03,214,1694761200"; d="scan'208";a="877587371" Received: from cascade.sh.intel.com ([10.239.48.35]) by orsmga004.jf.intel.com with ESMTP; 11 Oct 2023 01:44:44 -0700 From: Jingqi Liu To: iommu@lists.linux.dev, Lu Baolu , Tian Kevin , David Woodhouse , Joerg Roedel , Will Deacon , Robin Murphy Cc: linux-kernel@vger.kernel.org, Jingqi Liu Subject: [PATH v4 1/3] iommu/vt-d: debugfs: Dump entry pointing to huge page Date: Wed, 11 Oct 2023 16:39:13 +0800 Message-Id: <20231011083915.36706-2-Jingqi.liu@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20231011083915.36706-1-Jingqi.liu@intel.com> References: <20231011083915.36706-1-Jingqi.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" For the page table entry pointing to a huge page, the data below the level of the huge page is meaningless and does not need to be dumped. Signed-off-by: Jingqi Liu --- drivers/iommu/intel/debugfs.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel/debugfs.c b/drivers/iommu/intel/debugfs.c index 0255c4a23269..e2a3c37943a0 100644 --- a/drivers/iommu/intel/debugfs.c +++ b/drivers/iommu/intel/debugfs.c @@ -311,9 +311,14 @@ static inline unsigned long level_to_directory_size(in= t level) static inline void dump_page_info(struct seq_file *m, unsigned long iova, u64 *path) { - seq_printf(m, "0x%013lx |\t0x%016llx\t0x%016llx\t0x%016llx\t0x%016llx\t0x= %016llx\n", - iova >> VTD_PAGE_SHIFT, path[5], path[4], - path[3], path[2], path[1]); + seq_printf(m, "0x%013lx |\t0x%016llx\t0x%016llx\t0x%016llx", + iova >> VTD_PAGE_SHIFT, path[5], path[4], path[3]); + if (path[2]) { + seq_printf(m, "\t0x%016llx", path[2]); + if (path[1]) + seq_printf(m, "\t0x%016llx", path[1]); + } + seq_putc(m, '\n'); } =20 static void pgtable_walk_level(struct seq_file *m, struct dma_pte *pde, --=20 2.21.3