{"id":831032,"url":"http://patchwork.ozlabs.org/api/1.2/patches/831032/?format=json","web_url":"http://patchwork.ozlabs.org/project/kvm-ppc/patch/20171027030008.17200-1-aik@ozlabs.ru/","project":{"id":23,"url":"http://patchwork.ozlabs.org/api/1.2/projects/23/?format=json","name":"KVM PowerPC development","link_name":"kvm-ppc","list_id":"kvm-ppc.vger.kernel.org","list_email":"kvm-ppc@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20171027030008.17200-1-aik@ozlabs.ru>","list_archive_url":null,"date":"2017-10-27T03:00:08","name":"[kernel] vfio/spapr: Add trace points for map/unmap","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":false,"hash":"b0d950e6bfb032938424354cf0b258d9a5b03caf","submitter":{"id":7621,"url":"http://patchwork.ozlabs.org/api/1.2/people/7621/?format=json","name":"Alexey Kardashevskiy","email":"aik@ozlabs.ru"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/kvm-ppc/patch/20171027030008.17200-1-aik@ozlabs.ru/mbox/","series":[{"id":10478,"url":"http://patchwork.ozlabs.org/api/1.2/series/10478/?format=json","web_url":"http://patchwork.ozlabs.org/project/kvm-ppc/list/?series=10478","date":"2017-10-27T03:00:08","name":"[kernel] vfio/spapr: Add trace points for map/unmap","version":1,"mbox":"http://patchwork.ozlabs.org/series/10478/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/831032/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/831032/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=kvm-ppc-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yNTBm213vz9t30\n\tfor ;\n\tFri, 27 Oct 2017 14:00:16 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751399AbdJ0DAO (ORCPT );\n\tThu, 26 Oct 2017 23:00:14 -0400","from ozlabs.ru ([107.173.13.209]:51116 \"EHLO ozlabs.ru\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1751263AbdJ0DAO (ORCPT );\n\tThu, 26 Oct 2017 23:00:14 -0400","from vpl1.ozlabs.ibm.com (localhost [IPv6:::1])\n\tby ozlabs.ru (Postfix) with ESMTP id 611FB3A60125;\n\tThu, 26 Oct 2017 22:59:05 -0400 (EDT)"],"From":"Alexey Kardashevskiy ","To":"linuxppc-dev@lists.ozlabs.org","Cc":"Alexey Kardashevskiy ,\n\tAlex Williamson ,\n\tDavid Gibson ,\n\tkvm-ppc@vger.kernel.org, kvm@vger.kernel.org","Subject":"[PATCH kernel] vfio/spapr: Add trace points for map/unmap","Date":"Fri, 27 Oct 2017 14:00:08 +1100","Message-Id":"<20171027030008.17200-1-aik@ozlabs.ru>","X-Mailer":"git-send-email 2.11.0","Sender":"kvm-ppc-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"kvm-ppc@vger.kernel.org"},"content":"This adds trace_map/trace_unmap tracepoints to spapr driver. Type1 already\nuses these via the IOMMU API (iommu_map/__iommu_unmap).\n\nSigned-off-by: Alexey Kardashevskiy \n---\n\nExample:\n qemu-system-ppc-8655 [096] 724.662740: unmap: IOMMU: iova=0x000000003ffff000 size=4096 unmapped_size=4096\n qemu-system-ppc-8656 [104] 724.970912: map: IOMMU: iova=0x0800000000000000 paddr=0x00007ffef7ff0000 size=65536\n---\n drivers/vfio/vfio_iommu_spapr_tce.c | 12 ++++++++++--\n 1 file changed, 10 insertions(+), 2 deletions(-)","diff":"diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c\nindex 63112c36ab2d..4531486c77c6 100644\n--- a/drivers/vfio/vfio_iommu_spapr_tce.c\n+++ b/drivers/vfio/vfio_iommu_spapr_tce.c\n@@ -22,6 +22,7 @@\n #include \n #include \n #include \n+#include \n \n #include \n #include \n@@ -502,17 +503,19 @@ static int tce_iommu_clear(struct tce_container *container,\n \t\tstruct iommu_table *tbl,\n \t\tunsigned long entry, unsigned long pages)\n {\n-\tunsigned long oldhpa;\n+\tunsigned long oldhpa, unmapped, firstentry = entry, totalpages = pages;\n \tlong ret;\n \tenum dma_data_direction direction;\n \n-\tfor ( ; pages; --pages, ++entry) {\n+\tfor (unmapped = 0; pages; --pages, ++entry) {\n \t\tdirection = DMA_NONE;\n \t\toldhpa = 0;\n \t\tret = iommu_tce_xchg(tbl, entry, &oldhpa, &direction);\n \t\tif (ret)\n \t\t\tcontinue;\n \n+\t\t++unmapped;\n+\n \t\tif (direction == DMA_NONE)\n \t\t\tcontinue;\n \n@@ -523,6 +526,9 @@ static int tce_iommu_clear(struct tce_container *container,\n \n \t\ttce_iommu_unuse_page(container, oldhpa);\n \t}\n+\ttrace_unmap(firstentry << tbl->it_page_shift,\n+\t\t\ttotalpages << tbl->it_page_shift,\n+\t\t\tunmapped << tbl->it_page_shift);\n \n \treturn 0;\n }\n@@ -965,6 +971,8 @@ static long tce_iommu_ioctl(void *iommu_data,\n \t\t\t\t\tdirection);\n \n \t\tiommu_flush_tce(tbl);\n+\t\tif (!ret)\n+\t\t\ttrace_map(param.iova, param.vaddr, param.size);\n \n \t\treturn ret;\n \t}\n","prefixes":["kernel"]}