From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755757AbdLVAcc (ORCPT ); Thu, 21 Dec 2017 19:32:32 -0500 Received: from mga03.intel.com ([134.134.136.65]:55321 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755584AbdLVAcZ (ORCPT ); Thu, 21 Dec 2017 19:32:25 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,438,1508828400"; d="scan'208";a="15668354" 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 , Andy Shevchenko , Lu Baolu , Fenghua Yu Subject: [PATCH v5 4/5] iommu/vt-d: Add debugfs support to show Pasid table contents Date: Thu, 21 Dec 2017 16:32:39 -0800 Message-Id: <1513902760-45605-5-git-send-email-sohil.mehta@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513902760-45605-1-git-send-email-sohil.mehta@intel.com> References: <1513902760-45605-1-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:402b9e800 Extended Root table entries: Bus 0 L: 402150001 H: 0 Lower Context table entries for Bus: 0 [entry] DID :B :D .F Low High [80] 0000:00:0a.00 40214fa05 102 Higher Context table entries for Bus: 0 [80] 0000:00:0a.00 40260000c 0 Pasid Table Addr : ffff8e2d42600000 Pasid table entries for domain 0: [Entry] Contents [0] 12c409801 Cc: Sohil Mehta Cc: Fenghua Yu Cc: Jacob Pan Cc: Ashok Raj Signed-off-by: Gayatri Kammela --- v5: No change v4: Remove the unused function parameter Fix checkpatch.pl warnings v3: No change v2: Fix seq_printf formatting drivers/iommu/intel-iommu-debug.c | 31 +++++++++++++++++++++++++++++++ drivers/iommu/intel-svm.c | 8 -------- include/linux/intel-svm.h | 8 ++++++++ 3 files changed, 39 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/intel-iommu-debug.c b/drivers/iommu/intel-iommu-debug.c index a62862e..218d767 100644 --- a/drivers/iommu/intel-iommu-debug.c +++ b/drivers/iommu/intel-iommu-debug.c @@ -38,6 +38,36 @@ static const struct file_operations __name ## _fops = \ .owner = THIS_MODULE, \ } +#ifdef CONFIG_INTEL_IOMMU_SVM +static void pasid_tbl_entry_show(struct seq_file *m, 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_puts(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); + } + } + } +} +#else /* CONFIG_INTEL_IOMMU_SVM */ +static void pasid_tbl_entry_show(struct seq_file *m, struct intel_iommu *iommu) +{ +} +#endif /* CONFIG_INTEL_IOMMU_SVM */ + static void ctx_tbl_entry_show(struct seq_file *m, struct intel_iommu *iommu, int bus, bool ext, bool new_ext) { @@ -71,6 +101,7 @@ static void ctx_tbl_entry_show(struct seq_file *m, struct intel_iommu *iommu, } } } + pasid_tbl_entry_show(m, iommu); out: spin_unlock_irqrestore(&iommu->lock, flags); } diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index ed1cf7c..c646724 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