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GET /api/patches/44117/?format=api
{ "id": 44117, "url": "http://patches.dpdk.org/api/patches/44117/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/1535719857-19092-4-git-send-email-alejandro.lucero@netronome.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1535719857-19092-4-git-send-email-alejandro.lucero@netronome.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1535719857-19092-4-git-send-email-alejandro.lucero@netronome.com", "date": "2018-08-31T12:50:55", "name": "[v2,3/5] bus/pci: use IOVAs check when setting IOVA mode", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "5aed03b0fa9cecaca4f0c56fbe99c8cb73d640a3", "submitter": { "id": 270, "url": "http://patches.dpdk.org/api/people/270/?format=api", "name": "Alejandro Lucero", "email": "alejandro.lucero@netronome.com" }, "delegate": { "id": 1, "url": "http://patches.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/1535719857-19092-4-git-send-email-alejandro.lucero@netronome.com/mbox/", "series": [ { "id": 1138, "url": "http://patches.dpdk.org/api/series/1138/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=1138", "date": "2018-08-31T12:50:52", "name": "use IOVAs check based on DMA mask", "version": 2, "mbox": "http://patches.dpdk.org/series/1138/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/44117/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/44117/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 5B00B5F24;\n\tFri, 31 Aug 2018 14:52:03 +0200 (CEST)", "from netronome.com (host-79-78-33-110.static.as9105.net\n\t[79.78.33.110]) by dpdk.org (Postfix) with ESMTP id 4FA4258FA;\n\tFri, 31 Aug 2018 14:51:54 +0200 (CEST)", "from netronome.com (localhost [127.0.0.1])\n\tby netronome.com (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id\n\tw7VCp1gw019147; Fri, 31 Aug 2018 13:51:01 +0100", "(from alucero@localhost)\n\tby netronome.com (8.14.4/8.14.4/Submit) id w7VCp0vH019146;\n\tFri, 31 Aug 2018 13:51:00 +0100" ], "From": "Alejandro Lucero <alejandro.lucero@netronome.com>", "To": "dev@dpdk.org", "Cc": "stable@dpdk.org", "Date": "Fri, 31 Aug 2018 13:50:55 +0100", "Message-Id": "<1535719857-19092-4-git-send-email-alejandro.lucero@netronome.com>", "X-Mailer": "git-send-email 1.9.1", "In-Reply-To": "<1535719857-19092-1-git-send-email-alejandro.lucero@netronome.com>", "References": "<1535719857-19092-1-git-send-email-alejandro.lucero@netronome.com>", "Subject": "[dpdk-dev] [PATCH v2 3/5] bus/pci: use IOVAs check when setting\n\tIOVA mode", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Although VT-d emulation currently only supports 39 bits, it could\nbe iovas being within that supported range. This patch allows\nIOVA mode in such a case.\n\nIndeed, memory initialization code can be modified for using lower\nvirtual addresses than those used by the kernel for 64 bits processes\nby default, and therefore memsegs iovas can use 39 bits or less for\nmost system. And this is likely 100% true for VMs.\n\nSigned-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>\n---\n drivers/bus/pci/linux/pci.c | 15 ++++++++++-----\n 1 file changed, 10 insertions(+), 5 deletions(-)", "diff": "diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c\nindex 04648ac..215dc10 100644\n--- a/drivers/bus/pci/linux/pci.c\n+++ b/drivers/bus/pci/linux/pci.c\n@@ -588,10 +588,11 @@\n \tfclose(fp);\n \n \tmgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;\n-\tif (mgaw < X86_VA_WIDTH)\n-\t\treturn false;\n \n-\treturn true;\n+\tif (!rte_eal_check_dma_mask(mgaw))\n+\t\treturn true;\n+\telse\n+\t\treturn false;\n }\n #elif defined(RTE_ARCH_PPC_64)\n static bool\n@@ -615,13 +616,17 @@\n {\n \tstruct rte_pci_device *dev = NULL;\n \tstruct rte_pci_driver *drv = NULL;\n+\tint iommu_dma_mask_check_done = 0;\n \n \tFOREACH_DRIVER_ON_PCIBUS(drv) {\n \t\tFOREACH_DEVICE_ON_PCIBUS(dev) {\n \t\t\tif (!rte_pci_match(drv, dev))\n \t\t\t\tcontinue;\n-\t\t\tif (!pci_one_device_iommu_support_va(dev))\n-\t\t\t\treturn false;\n+\t\t\tif (!iommu_dma_mask_check_done) {\n+\t\t\t\tif (!pci_one_device_iommu_support_va(dev))\n+\t\t\t\t\treturn false;\n+\t\t\t\tiommu_dma_mask_check_done = 1;\n+\t\t\t}\n \t\t}\n \t}\n \treturn true;\n", "prefixes": [ "v2", "3/5" ] }