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{ "id": 1152964, "url": "http://patchwork.ozlabs.org/api/covers/1152964/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20190826061705.92048-1-aik@ozlabs.ru/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20190826061705.92048-1-aik@ozlabs.ru>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20190826061705.92048-1-aik@ozlabs.ru/", "date": "2019-08-26T06:17:01", "name": "[kernel,v2,0/4] powerpc/powernv/kvm: Invalidate multiple TCEs at once", "submitter": { "id": 7621, "url": "http://patchwork.ozlabs.org/api/people/7621/?format=api", "name": "Alexey Kardashevskiy", "email": "aik@ozlabs.ru" }, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20190826061705.92048-1-aik@ozlabs.ru/mbox/", "series": [ { "id": 127248, "url": "http://patchwork.ozlabs.org/api/series/127248/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=127248", "date": "2019-08-26T06:17:02", "name": "powerpc/powernv/kvm: Invalidate multiple TCEs at once", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/127248/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/1152964/comments/", "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\tkey-exchange X25519 server-signature RSA-PSS (4096 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 46H22f2ySnz9sQq\n\tfor <patchwork-incoming@ozlabs.org>;\n\tMon, 26 Aug 2019 16:21:30 +1000 (AEST)", "from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 46H22c1wnyzDqbc\n\tfor <patchwork-incoming@ozlabs.org>;\n\tMon, 26 Aug 2019 16:21:28 +1000 (AEST)", "from ozlabs.ru (ozlabs.ru [107.173.13.209])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 46H1yN49ZgzDqcm\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tMon, 26 Aug 2019 16:17:48 +1000 (AEST)", "from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1])\n\tby ozlabs.ru (Postfix) with ESMTP id 2CD15AE80011;\n\tMon, 26 Aug 2019 02:16:53 -0400 (EDT)" ], "Authentication-Results": [ "ozlabs.org;\n\tdmarc=none (p=none dis=none) header.from=ozlabs.ru", "lists.ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=ozlabs.ru\n\t(client-ip=107.173.13.209; helo=ozlabs.ru; envelope-from=aik@ozlabs.ru;\n\treceiver=<UNKNOWN>)", "lists.ozlabs.org;\n\tdmarc=none (p=none dis=none) header.from=ozlabs.ru" ], "From": "Alexey Kardashevskiy <aik@ozlabs.ru>", "To": "linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH kernel v2 0/4] powerpc/powernv/kvm: Invalidate multiple TCEs\n\tat once", "Date": "Mon, 26 Aug 2019 16:17:01 +1000", "Message-Id": "<20190826061705.92048-1-aik@ozlabs.ru>", "X-Mailer": "git-send-email 2.17.1", "X-BeenThere": "linuxppc-dev@lists.ozlabs.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "Linux on PowerPC Developers Mail List\n\t<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "Cc": "kvm@vger.kernel.org, Alexey Kardashevskiy <aik@ozlabs.ru>,\n\tkvm-ppc@vger.kernel.org, Alex Williamson <alex.williamson@redhat.com>,\n\tPaul Mackerras <paulus@samba.org>,\n\tAlistair Popple <alistair@popple.id.au>, \n\tDavid Gibson <david@gibson.dropbear.id.au>", "Errors-To": "linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org", "Sender": "\"Linuxppc-dev\"\n\t<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "So far TCE cache updates (IOMMU translation cache on POWER8/9\nPHB/NPU units) were barely noticeable; however with 100+GB guests\nwe now see RCU stall warnings in guests because we spend too much\ntime in the host system firmware which does actual TCE cache\nupdates, hence this patchset.\n\nThis is a rework of https://patchwork.ozlabs.org/patch/1149003/\nThis depends on KVM-PPC's bugfix: https://patchwork.ozlabs.org/patch/1152937/\n\nI expect 1/4 to go via the PPC tree, 2/4 via the KVM-PPC tree,\n3/4 via the VFIO tree and 4/4 via the PPC tree so it is a loop.\nThere is always a hope it can go via one tree :)\n\n\nThis is based on sha1\n42ac26d253eb Santosh Sivaraj \"powerpc: add machine check safe copy_to_user\".\n\nPlease comment. Thanks.\n\n\n\nAlexey Kardashevskiy (4):\n powerpc/powernv/ioda: Split out TCE invalidation from TCE updates\n KVM: PPC: Invalidate multiple TCEs at once\n vfio/spapr_tce: Invalidate multiple TCEs at once\n powerpc/powernv/ioda: Remove obsolete iommu_table_ops::exchange\n callbacks\n\n arch/powerpc/include/asm/iommu.h | 21 ++++++---\n arch/powerpc/kernel/iommu.c | 23 ++++++----\n arch/powerpc/kvm/book3s_64_vio.c | 29 ++++++++----\n arch/powerpc/kvm/book3s_64_vio_hv.c | 38 +++++++++++----\n arch/powerpc/platforms/powernv/pci-ioda.c | 56 ++++-------------------\n drivers/vfio/vfio_iommu_spapr_tce.c | 18 +++++---\n 6 files changed, 96 insertions(+), 89 deletions(-)" }