From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753818AbeDRElr (ORCPT ); Wed, 18 Apr 2018 00:41:47 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:53034 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753639AbeDRElp (ORCPT ); Wed, 18 Apr 2018 00:41:45 -0400 From: Peter Xu To: linux-kernel@vger.kernel.org Cc: Alex Williamson , Joerg Roedel , David Woodhouse , peterx@redhat.com Subject: [PATCH 1/3] intel-iommu: add some traces for PSIs Date: Wed, 18 Apr 2018 12:41:28 +0800 Message-Id: <20180418044130.12339-2-peterx@redhat.com> In-Reply-To: <20180418044130.12339-1-peterx@redhat.com> References: <20180418044130.12339-1-peterx@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It is helpful to debug and triage PSI notification missings. Signed-off-by: Peter Xu --- drivers/iommu/dmar.c | 3 +++ drivers/iommu/intel-iommu.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 9a7ffd13c7f0..62ae26c3f7b7 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1325,6 +1325,9 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr, struct qi_desc desc; int ih = 0; + pr_debug("%s: iommu %d did %u addr 0x%llx order %u type %llx\n", + __func__, iommu->seq_id, did, addr, size_order, type); + if (cap_write_drain(iommu->cap)) dw = 1; diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 582fd01cb7d1..a64da83e867c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1396,6 +1396,9 @@ static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 val = 0, val_iva = 0; unsigned long flag; + pr_debug("%s: iommu %d did %u addr 0x%llx order %u type %llx\n", + __func__, iommu->seq_id, did, addr, size_order, type); + switch (type) { case DMA_TLB_GLOBAL_FLUSH: /* global flush doesn't need set IVA_REG */ -- 2.14.3