From patchwork Fri Jun 26 07:22:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 279376 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADF4AC433E0 for ; Fri, 26 Jun 2020 07:24:24 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7DEC12076E for ; Fri, 26 Jun 2020 07:24:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QW0c0+C5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7DEC12076E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48150 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1joiil-0000GH-Jb for qemu-devel@archiver.kernel.org; Fri, 26 Jun 2020 03:24:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57756) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1joihj-0007Mu-SL for qemu-devel@nongnu.org; Fri, 26 Jun 2020 03:23:19 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:49855 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1joihg-00034J-6k for qemu-devel@nongnu.org; Fri, 26 Jun 2020 03:23:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593156195; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=qhGaneoHx5il05o01jW1hDOadm2bPogSKu/DKrsEmAc=; b=QW0c0+C5aNQWCAuvW+3M+RpERafhzTLnFPuW06mtSlT24MYXDrPGOpC6dDA7x7brs2CNdQ KX5CfaEfPVrkV6/X1XV7KwZOGBdBmiLuZYFEqzLDDLVOM8oS4fszIhg5mwJF03gk4JVKPN hIH2KQmzJaSwJXgfbSxrw27eTXSLZ4k= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-168-rL45roI1OLesF9PxZX_jrQ-1; Fri, 26 Jun 2020 03:23:11 -0400 X-MC-Unique: rL45roI1OLesF9PxZX_jrQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 81D1E1009441; Fri, 26 Jun 2020 07:23:08 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-35.ams2.redhat.com [10.36.113.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7C6C560C1D; Fri, 26 Jun 2020 07:22:49 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v5 00/21] virtio-mem: Paravirtualized memory hot(un)plug Date: Fri, 26 Jun 2020 09:22:27 +0200 Message-Id: <20200626072248.78761-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Received-SPF: pass client-ip=205.139.110.120; envelope-from=david@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/26 01:55:55 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , kvm@vger.kernel.org, "Michael S . Tsirkin" , teawater , Alex Shi , Janosch Frank , Juan Quintela , David Hildenbrand , Markus Armbruster , Halil Pasic , Christian Borntraeger , Richard Henderson , Vivek Goyal , Eric Farman , Lukas Straub , Eduardo Habkost , Sergio Lopez , "Dr . David Alan Gilbert" , Alex Williamson , "qemu-arm@nongnu.org" , Paolo Bonzini , Keith Busch , Hailiang Zhang , Tony Krowiak , Pankaj Gupta , Pierre Morel , Cornelia Huck , qemu-s390x@nongnu.org, Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is the very basic, initial version of virtio-mem. More info on virtio-mem in general can be found in the Linux kernel driver v2 posting [1] and in patch #10. The Linux driver is now upstream. This series now contains a resend of [3]: "[PATCH v1] pc: Support coldplugging of virtio-pmem-pci devices on all buses" The patches can be found at: https://github.com/davidhildenbrand/qemu.git virtio-mem-v5 "The basic idea of virtio-mem is to provide a flexible, cross-architecture memory hot(un)plug solution that avoids many limitations imposed by existing technologies, architectures, and interfaces." There are a lot of addons in the works (esp. protection of unplugged memory, better hugepage support (esp. when reading unplugged memory), resizeable memory backends, support for more architectures, ...), this is the very basic version to get the ball rolling. The first patch is a resend. Patches #2-#9 make sure we don't have any sudden surprises e.g., if somebody tries to pin all memory in RAM blocks, resulting in a higher memory consumption than desired. The remaining patches add basic virtio-mem along with support for x86-64. The last patch indicates to the guest OS the maximum possible PFN using ACPI SRAT, such that Linux can properly enable the swiotlb when booting only with DMA memory. [1] https://lkml.kernel.org/r/20200311171422.10484-1-david@redhat.com [2] https://lkml.kernel.org/r/20200507140139.17083-1-david@redhat.com [3] https://lkml.kernel.org/r/20200525084511.51379-1-david@redhat.com [3] https://lkml.kernel.org/r/20200610075153.33892-1-david@redhat.com Cc: teawater Cc: Pankaj Gupta v4 -> v5: - Rebased, added acks/rb's - "pc: Support coldplugging of virtio-pmem-pci devices on all buses" -- Included it now, for simplicity - "linux-headers: update to contain virtio-mem" -- Dropped, because header changes are already upstream now - "MAINTAINERS: Add myself as virtio-mem maintainer" -- Reference status page v3 -> v4 - Adapt to virtio-mem config layout change (block size now is 64bit) - Added "numa: Auto-enable NUMA when any memory devices are possible" v2 -> v3: - Rebased on upstream/[3] - "virtio-mem: Exclude unplugged memory during migration" -- Added - "virtio-mem: Paravirtualized memory hot(un)plug" -- Simplify bitmap operations, find consecutive areas -- Tweak error messages -- Reshuffle some checks -- Minor cleanups - "accel/kvm: Convert to ram_block_discard_disable()" - "target/i386: sev: Use ram_block_discard_disable()" -- Keep asserts clean of functional things v1 -> v2: - Rebased to object_property_*() changes - "exec: Introduce ram_block_discard_(disable|require)()" -- Change the function names and rephrase/add comments - "virtio-balloon: Rip out qemu_balloon_inhibit()" -- Add and use "migration_in_incoming_postcopy()" - "migration/rdma: Use ram_block_discard_disable()" -- Add a comment regarding pin_all vs. !pin_all - "virtio-mem: Paravirtualized memory hot(un)plug" -- Replace virtio_mem_discard_inhibited() by migration_in_incoming_postcopy() -- Drop some asserts -- Drop virtio_mem_bad_request(), use virtio_error() directly, printing more information -- Replace "Note: Discarding should never fail ..." comments by error_report() -- Replace virtio_stw_p() by cpu_to_le16() -- Drop migration_addr and migration_block_size -- Minor cleanups - "linux-headers: update to contain virtio-mem" -- Updated to latest v4 in Linux - General changes -- Fixup the users of the renamed ram_block_discard_(disable|require) -- Use "X: cannot disable RAM discard"-styled error messages - Added -- "virtio-mem: Migration sanity checks" -- "virtio-mem: Add trace events" David Hildenbrand (21): pc: Support coldplugging of virtio-pmem-pci devices on all buses exec: Introduce ram_block_discard_(disable|require)() vfio: Convert to ram_block_discard_disable() accel/kvm: Convert to ram_block_discard_disable() s390x/pv: Convert to ram_block_discard_disable() virtio-balloon: Rip out qemu_balloon_inhibit() target/i386: sev: Use ram_block_discard_disable() migration/rdma: Use ram_block_discard_disable() migration/colo: Use ram_block_discard_disable() virtio-mem: Paravirtualized memory hot(un)plug virtio-pci: Proxy for virtio-mem MAINTAINERS: Add myself as virtio-mem maintainer hmp: Handle virtio-mem when printing memory device info numa: Handle virtio-mem in NUMA stats pc: Support for virtio-mem-pci virtio-mem: Allow notifiers for size changes virtio-pci: Send qapi events when the virtio-mem size changes virtio-mem: Migration sanity checks virtio-mem: Add trace events virtio-mem: Exclude unplugged memory during migration numa: Auto-enable NUMA when any memory devices are possible MAINTAINERS | 9 + accel/kvm/kvm-all.c | 4 +- balloon.c | 17 - exec.c | 52 ++ hw/arm/virt.c | 2 + hw/core/numa.c | 17 +- hw/i386/Kconfig | 1 + hw/i386/microvm.c | 1 + hw/i386/pc.c | 66 +-- hw/i386/pc_piix.c | 1 + hw/i386/pc_q35.c | 1 + hw/s390x/s390-virtio-ccw.c | 22 +- hw/vfio/ap.c | 8 +- hw/vfio/ccw.c | 11 +- hw/vfio/common.c | 53 +- hw/vfio/pci.c | 6 +- hw/virtio/Kconfig | 11 + hw/virtio/Makefile.objs | 2 + hw/virtio/trace-events | 10 + hw/virtio/virtio-balloon.c | 10 +- hw/virtio/virtio-mem-pci.c | 157 ++++++ hw/virtio/virtio-mem-pci.h | 34 ++ hw/virtio/virtio-mem.c | 873 +++++++++++++++++++++++++++++++++ include/exec/memory.h | 41 ++ include/hw/boards.h | 1 + include/hw/pci/pci.h | 1 + include/hw/vfio/vfio-common.h | 4 +- include/hw/virtio/virtio-mem.h | 86 ++++ include/migration/colo.h | 2 +- include/migration/misc.h | 2 + include/sysemu/balloon.h | 2 - migration/migration.c | 15 +- migration/postcopy-ram.c | 23 - migration/rdma.c | 18 +- migration/savevm.c | 11 +- monitor/hmp-cmds.c | 16 + monitor/monitor.c | 1 + qapi/misc.json | 64 ++- target/i386/sev.c | 7 + 39 files changed, 1529 insertions(+), 133 deletions(-) create mode 100644 hw/virtio/virtio-mem-pci.c create mode 100644 hw/virtio/virtio-mem-pci.h create mode 100644 hw/virtio/virtio-mem.c create mode 100644 include/hw/virtio/virtio-mem.h