From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754737AbdLFDn1 (ORCPT ); Tue, 5 Dec 2017 22:43:27 -0500 Received: from mga11.intel.com ([192.55.52.93]:18365 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754722AbdLFDnY (ORCPT ); Tue, 5 Dec 2017 22:43:24 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,366,1508828400"; d="scan'208";a="13489917" From: Sohil Mehta To: Joerg Roedel , Alex Williamson Cc: David Woodhouse , Ashok Raj , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Jacob Pan , Gayatri Kammela , Sohil Mehta , Ravi V Shankar , Andriy Shevchenko , Fenghua Yu Subject: [PATCH v3 5/6] iommu/vt-d: Add debugfs extension to show Pasid table contents Date: Tue, 5 Dec 2017 19:43:26 -0800 Message-Id: <1512531807-24268-6-git-send-email-sohil.mehta@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1512531807-24268-1-git-send-email-sohil.mehta@intel.com> References: <1512531807-24268-1-git-send-email-sohil.mehta@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Gayatri Kammela Debugfs extension to dump the internals such as pasid table entries for each IOMMU to the userspace. Example of such dump in Kabylake: root@OTC-KBLH-01:~# cat /sys/kernel/debug/intel_iommu/dmar_translation_struct IOMMU dmar0: Extended Root Table Addr:4310c4800 Extended Root tbl entries: Bus 0 L: 3ff5a8001 H: 0 Lower Context table entries for Bus: 0 [entry] DID :B :D .F Low High [80] 0000:00:0a.00 3ff5a9a05 102 Higher Context tbl entries for Bus: 0 [80] 0000:00:0a.00 40160000c 725140000000 Pasid Table Addr : ffff8db2c1600000 Pasid table entries for domain: 0000 [Entry] Contents [0] 26a609801 Cc: Sohil Mehta Cc: Fenghua Yu Cc: Jacob Pan Cc: Ashok Raj Signed-off-by: Gayatri Kammela --- v3: No change v2: Fix seq_printf formatting drivers/iommu/intel-iommu-debug.c | 32 ++++++++++++++++++++++++++++++++ drivers/iommu/intel-svm.c | 8 -------- include/linux/intel-svm.h | 8 ++++++++ 3 files changed, 40 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/intel-iommu-debug.c b/drivers/iommu/intel-iommu-debug.c index 0951d58..66a99f5 100644 --- a/drivers/iommu/intel-iommu-debug.c +++ b/drivers/iommu/intel-iommu-debug.c @@ -47,6 +47,31 @@ static const struct file_operations __name ## _fops = \ } #ifdef CONFIG_INTEL_IOMMU_SVM +static void pasid_tbl_entry_show(struct seq_file *m, void *unused, + struct intel_iommu *iommu) +{ + int pasid_size = 0, i; + + if (ecap_pasid(iommu->ecap)) { + pasid_size = intel_iommu_get_pts(iommu); + seq_printf(m, "Pasid Table Addr : %p\n", iommu->pasid_table); + + if (iommu->pasid_table) { + seq_printf(m, "Pasid table entries for domain %d:\n", + iommu->segment); + seq_printf(m, "[Entry]\t\tContents\n"); + + /* Publish the pasid table entries here */ + for (i = 0; i < pasid_size; i++) { + if (!iommu->pasid_table[i].val) + continue; + seq_printf(m, "[%d]\t\t%04llx\n", i, + iommu->pasid_table[i].val); + } + } + } +} + static void ext_ctx_tbl_entry_show(struct seq_file *m, void *unused, struct intel_iommu *iommu, int bus, int ctx, struct context_entry *context, bool new_ext) @@ -70,6 +95,12 @@ static void ext_ctx_tbl_entry_show(struct seq_file *m, void *unused, } } #else /* CONFIG_INTEL_IOMMU_SVM */ +static void pasid_tbl_entry_show(struct seq_file *m, void *unused, + struct intel_iommu *iommu) +{ + return; +} + static void ext_ctx_tbl_entry_show(struct seq_file *m, void *unused, struct intel_iommu *iommu, int bus, int ctx, struct context_entry *context, bool new_ext) @@ -106,6 +137,7 @@ static void ctx_tbl_entry_show(struct seq_file *m, void *unused, context, new_ext); } } + pasid_tbl_entry_show(m, unused, iommu); out: spin_unlock_irqrestore(&iommu->lock, flags); } diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index f6697e5..2003f23 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -28,14 +28,6 @@ static irqreturn_t prq_event_thread(int irq, void *d); -struct pasid_entry { - u64 val; -}; - -struct pasid_state_entry { - u64 val; -}; - int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu) { struct page *pages; diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h index 733eaf9..a8abad6 100644 --- a/include/linux/intel-svm.h +++ b/include/linux/intel-svm.h @@ -18,6 +18,14 @@ struct device; +struct pasid_entry { + u64 val; +}; + +struct pasid_state_entry { + u64 val; +}; + struct svm_dev_ops { void (*fault_cb)(struct device *dev, int pasid, u64 address, u32 private, int rwxp, int response); -- 2.7.4