From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59C04C55186 for ; Wed, 22 Apr 2020 08:09:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FE312071E for ; Wed, 22 Apr 2020 08:09:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726445AbgDVIJa (ORCPT ); Wed, 22 Apr 2020 04:09:30 -0400 Received: from mga01.intel.com ([192.55.52.88]:3118 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725810AbgDVIJ1 (ORCPT ); Wed, 22 Apr 2020 04:09:27 -0400 IronPort-SDR: L4TL1am0J4xMpuwudf3VeL+vRgDQUyrUkISgySWFE2FYEjRY0y72dv4BZSu5Y9GRu3TWFUZDjg Xz+rG0H9R6Zw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2020 01:09:26 -0700 IronPort-SDR: YpCw/mBM75WDm5mOuVyzsTFwQFCeNiFKLDRLe9vAZ2RX/uiR/nlt30duiUblJWjHGfTph9o+qR H+BpKAQYWk9A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,412,1580803200"; d="scan'208";a="365609630" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga001.fm.intel.com with ESMTP; 22 Apr 2020 01:09:24 -0700 From: Lu Baolu To: Joerg Roedel Cc: ashok.raj@intel.com, jacob.jun.pan@linux.intel.com, Liu Yi L , kevin.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v3 2/4] iommu/vt-d: debugfs: Add support to show inv queue internals Date: Wed, 22 Apr 2020 16:06:09 +0800 Message-Id: <20200422080611.15689-3-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200422080611.15689-1-baolu.lu@linux.intel.com> References: <20200422080611.15689-1-baolu.lu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Export invalidation queue internals of each iommu device through the debugfs. Example of such dump on a Skylake machine: $ sudo cat /sys/kernel/debug/iommu/intel/invalidation_queue Invalidation queue on IOMMU: dmar1 Base: 0x1672c9000 Head: 80 Tail: 80 Index qw0 qw1 status 0 0000000000000004 0000000000000000 0000000000000000 1 0000000200000025 00000001672be804 0000000000000000 2 0000000000000011 0000000000000000 0000000000000000 3 0000000200000025 00000001672be80c 0000000000000000 4 00000000000000d2 0000000000000000 0000000000000000 5 0000000200000025 00000001672be814 0000000000000000 6 0000000000000014 0000000000000000 0000000000000000 7 0000000200000025 00000001672be81c 0000000000000000 8 0000000000000014 0000000000000000 0000000000000000 9 0000000200000025 00000001672be824 0000000000000000 Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu-debugfs.c | 62 +++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c index 3eb1fe240fb0..e3089865b8f3 100644 --- a/drivers/iommu/intel-iommu-debugfs.c +++ b/drivers/iommu/intel-iommu-debugfs.c @@ -372,6 +372,66 @@ static int domain_translation_struct_show(struct seq_file *m, void *unused) } DEFINE_SHOW_ATTRIBUTE(domain_translation_struct); +static void invalidation_queue_entry_show(struct seq_file *m, + struct intel_iommu *iommu) +{ + int index, shift = qi_shift(iommu); + struct qi_desc *desc; + int offset; + + if (ecap_smts(iommu->ecap)) + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tqw2\t\t\tqw3\t\t\tstatus\n"); + else + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tstatus\n"); + + for (index = 0; index < QI_LENGTH; index++) { + offset = index << shift; + desc = iommu->qi->desc + offset; + if (ecap_smts(iommu->ecap)) + seq_printf(m, "%5d\t%016llx\t%016llx\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + desc->qw2, desc->qw3, + iommu->qi->desc_status[index]); + else + seq_printf(m, "%5d\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + iommu->qi->desc_status[index]); + } +} + +static int invalidation_queue_show(struct seq_file *m, void *unused) +{ + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + unsigned long flags; + struct q_inval *qi; + int shift; + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) { + qi = iommu->qi; + shift = qi_shift(iommu); + + if (!qi || !ecap_qis(iommu->ecap)) + continue; + + seq_printf(m, "Invalidation queue on IOMMU: %s\n", iommu->name); + + raw_spin_lock_irqsave(&qi->q_lock, flags); + seq_printf(m, " Base: 0x%llx\tHead: %lld\tTail: %lld\n", + virt_to_phys(qi->desc), + dmar_readq(iommu->reg + DMAR_IQH_REG) >> shift, + dmar_readq(iommu->reg + DMAR_IQT_REG) >> shift); + invalidation_queue_entry_show(m, iommu); + raw_spin_unlock_irqrestore(&qi->q_lock, flags); + seq_putc(m, '\n'); + } + rcu_read_unlock(); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(invalidation_queue); + #ifdef CONFIG_IRQ_REMAP static void ir_tbl_remap_entry_show(struct seq_file *m, struct intel_iommu *iommu) @@ -490,6 +550,8 @@ void __init intel_iommu_debugfs_init(void) debugfs_create_file("domain_translation_struct", 0444, intel_iommu_debug, NULL, &domain_translation_struct_fops); + debugfs_create_file("invalidation_queue", 0444, intel_iommu_debug, + NULL, &invalidation_queue_fops); #ifdef CONFIG_IRQ_REMAP debugfs_create_file("ir_translation_struct", 0444, intel_iommu_debug, NULL, &ir_translation_struct_fops); -- 2.17.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1555FC55189 for ; Wed, 22 Apr 2020 08:09:32 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E3F2820738 for ; Wed, 22 Apr 2020 08:09:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3F2820738 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id B6D9B875BF; Wed, 22 Apr 2020 08:09:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KY22fZeY9XON; Wed, 22 Apr 2020 08:09:31 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 1D96A875C7; Wed, 22 Apr 2020 08:09:30 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 01735C1DCA; Wed, 22 Apr 2020 08:09:30 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 06C24C0175 for ; Wed, 22 Apr 2020 08:09:28 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 0268620526 for ; Wed, 22 Apr 2020 08:09:28 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bbWPjTIL884H for ; Wed, 22 Apr 2020 08:09:27 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by silver.osuosl.org (Postfix) with ESMTPS id E9B502033D for ; Wed, 22 Apr 2020 08:09:26 +0000 (UTC) IronPort-SDR: HlXZynA2AMExhQYAvQzlG2VFADZbDcuKFe/iS44UzLx7ytv6oW+h2pxs7jW7gD2CPTcybAF+Qw rYC7hlwk129A== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2020 01:09:26 -0700 IronPort-SDR: YpCw/mBM75WDm5mOuVyzsTFwQFCeNiFKLDRLe9vAZ2RX/uiR/nlt30duiUblJWjHGfTph9o+qR H+BpKAQYWk9A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,412,1580803200"; d="scan'208";a="365609630" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga001.fm.intel.com with ESMTP; 22 Apr 2020 01:09:24 -0700 From: Lu Baolu To: Joerg Roedel Subject: [PATCH v3 2/4] iommu/vt-d: debugfs: Add support to show inv queue internals Date: Wed, 22 Apr 2020 16:06:09 +0800 Message-Id: <20200422080611.15689-3-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200422080611.15689-1-baolu.lu@linux.intel.com> References: <20200422080611.15689-1-baolu.lu@linux.intel.com> Cc: kevin.tian@intel.com, ashok.raj@intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Export invalidation queue internals of each iommu device through the debugfs. Example of such dump on a Skylake machine: $ sudo cat /sys/kernel/debug/iommu/intel/invalidation_queue Invalidation queue on IOMMU: dmar1 Base: 0x1672c9000 Head: 80 Tail: 80 Index qw0 qw1 status 0 0000000000000004 0000000000000000 0000000000000000 1 0000000200000025 00000001672be804 0000000000000000 2 0000000000000011 0000000000000000 0000000000000000 3 0000000200000025 00000001672be80c 0000000000000000 4 00000000000000d2 0000000000000000 0000000000000000 5 0000000200000025 00000001672be814 0000000000000000 6 0000000000000014 0000000000000000 0000000000000000 7 0000000200000025 00000001672be81c 0000000000000000 8 0000000000000014 0000000000000000 0000000000000000 9 0000000200000025 00000001672be824 0000000000000000 Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu-debugfs.c | 62 +++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c index 3eb1fe240fb0..e3089865b8f3 100644 --- a/drivers/iommu/intel-iommu-debugfs.c +++ b/drivers/iommu/intel-iommu-debugfs.c @@ -372,6 +372,66 @@ static int domain_translation_struct_show(struct seq_file *m, void *unused) } DEFINE_SHOW_ATTRIBUTE(domain_translation_struct); +static void invalidation_queue_entry_show(struct seq_file *m, + struct intel_iommu *iommu) +{ + int index, shift = qi_shift(iommu); + struct qi_desc *desc; + int offset; + + if (ecap_smts(iommu->ecap)) + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tqw2\t\t\tqw3\t\t\tstatus\n"); + else + seq_puts(m, "Index\t\tqw0\t\t\tqw1\t\t\tstatus\n"); + + for (index = 0; index < QI_LENGTH; index++) { + offset = index << shift; + desc = iommu->qi->desc + offset; + if (ecap_smts(iommu->ecap)) + seq_printf(m, "%5d\t%016llx\t%016llx\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + desc->qw2, desc->qw3, + iommu->qi->desc_status[index]); + else + seq_printf(m, "%5d\t%016llx\t%016llx\t%016x\n", + index, desc->qw0, desc->qw1, + iommu->qi->desc_status[index]); + } +} + +static int invalidation_queue_show(struct seq_file *m, void *unused) +{ + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + unsigned long flags; + struct q_inval *qi; + int shift; + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) { + qi = iommu->qi; + shift = qi_shift(iommu); + + if (!qi || !ecap_qis(iommu->ecap)) + continue; + + seq_printf(m, "Invalidation queue on IOMMU: %s\n", iommu->name); + + raw_spin_lock_irqsave(&qi->q_lock, flags); + seq_printf(m, " Base: 0x%llx\tHead: %lld\tTail: %lld\n", + virt_to_phys(qi->desc), + dmar_readq(iommu->reg + DMAR_IQH_REG) >> shift, + dmar_readq(iommu->reg + DMAR_IQT_REG) >> shift); + invalidation_queue_entry_show(m, iommu); + raw_spin_unlock_irqrestore(&qi->q_lock, flags); + seq_putc(m, '\n'); + } + rcu_read_unlock(); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(invalidation_queue); + #ifdef CONFIG_IRQ_REMAP static void ir_tbl_remap_entry_show(struct seq_file *m, struct intel_iommu *iommu) @@ -490,6 +550,8 @@ void __init intel_iommu_debugfs_init(void) debugfs_create_file("domain_translation_struct", 0444, intel_iommu_debug, NULL, &domain_translation_struct_fops); + debugfs_create_file("invalidation_queue", 0444, intel_iommu_debug, + NULL, &invalidation_queue_fops); #ifdef CONFIG_IRQ_REMAP debugfs_create_file("ir_translation_struct", 0444, intel_iommu_debug, NULL, &ir_translation_struct_fops); -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu