From nobody Sun Dec 14 08:03:50 2025 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 40F6FCDB47E for ; Fri, 13 Oct 2023 14:04:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232052AbjJMOEM (ORCPT ); Fri, 13 Oct 2023 10:04:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232029AbjJMOEF (ORCPT ); Fri, 13 Oct 2023 10:04:05 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42B83BF for ; Fri, 13 Oct 2023 07:04:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697205843; x=1728741843; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=1MbYs6JgegSN2mIA//yZ0XYbUKs0DkULemhAxSRyXp4=; b=PGZG0xFPHZNm7YQsSKfFdHgvgwOWEEerZTRO/aN6rS/wZICsbolq4Tz5 Y5I4d21lM4A450zkvQ8T3Zgk5BeZ8Bf16GroWTMJM6nJuauHhC3PgfJYN Qbb0T4Po87n8RNrOiTlE3L1JdWKCcrSIc60doWSeDY71GI7K2JKVbZGjB TNfeJ+dfV4UWiSu7rVWDkrC1532ttntxiiS6huaYQgG8R3w+h/U408sP3 cDfPS50F2beHAB4q0Zr1pnDp4zfRyEFEFaXmXq0jus93jjCwjnHk7Ag39 5quZbJzX2CR+PalWGT68wB2foTCPbAcjcUUidor1HfQaILKBqm5y7Tx2t g==; X-IronPort-AV: E=McAfee;i="6600,9927,10862"; a="384049322" X-IronPort-AV: E=Sophos;i="6.03,222,1694761200"; d="scan'208";a="384049322" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2023 07:04:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10862"; a="1086156354" X-IronPort-AV: E=Sophos;i="6.03,222,1694761200"; d="scan'208";a="1086156354" Received: from cascade.sh.intel.com ([10.239.48.35]) by fmsmga005.fm.intel.com with ESMTP; 13 Oct 2023 07:03:59 -0700 From: Jingqi Liu To: iommu@lists.linux.dev, Lu Baolu , Tian Kevin , Joerg Roedel , Will Deacon , Robin Murphy Cc: linux-kernel@vger.kernel.org, Jingqi Liu Subject: [PATH v5 1/3] iommu/vt-d: debugfs: Dump entry pointing to huge page Date: Fri, 13 Oct 2023 21:58:09 +0800 Message-Id: <20231013135811.73953-2-Jingqi.liu@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20231013135811.73953-1-Jingqi.liu@intel.com> References: <20231013135811.73953-1-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 1f925285104e..497c1561d3d2 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