From patchwork Tue Apr 21 08:52:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 284155 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=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=ham 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 127B8C2BA19 for ; Tue, 21 Apr 2020 08:55:57 +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 C91D7206E9 for ; Tue, 21 Apr 2020 08:55:56 +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="UWDQDLYW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C91D7206E9 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]:54108 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQohA-0001Ma-0q for qemu-devel@archiver.kernel.org; Tue, 21 Apr 2020 04:55:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57162) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQofG-0007Cx-A9 for qemu-devel@nongnu.org; Tue, 21 Apr 2020 04:53:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jQof5-000059-Mh for qemu-devel@nongnu.org; Tue, 21 Apr 2020 04:53:58 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:20315 helo=us-smtp-delivery-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 1jQof5-0008Sk-A3 for qemu-devel@nongnu.org; Tue, 21 Apr 2020 04:53:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587459225; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MniKsTyZcYYg4+0248McbTqEYXfCaUzKL5fDumZzcL8=; b=UWDQDLYWciWpFad6/CwwTYxSxRVsUKynVM3IpmP/HntHWOleRP/lnou1gaifVaCmrYzwKS nFDP8khDWlM+wFv0OVXPTyT3U1D1x/qcxR9VM5xXUh7HqJGJqx9FqnFZXA+JhA6lVWmB/p UYZThsW4Yy6khC3t/MDu3mTFSW8xOCc= 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-126-3VdHCkBzMbSh5N1tzltISA-1; Tue, 21 Apr 2020 04:53:41 -0400 X-MC-Unique: 3VdHCkBzMbSh5N1tzltISA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CB8A1190D37F; Tue, 21 Apr 2020 08:53:40 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-245.ams2.redhat.com [10.36.113.245]) by smtp.corp.redhat.com (Postfix) with ESMTP id A5DD710027BA; Tue, 21 Apr 2020 08:53:18 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v4 01/13] util: vfio-helpers: Factor out and fix processing of existing ram blocks Date: Tue, 21 Apr 2020 10:52:48 +0200 Message-Id: <20200421085300.7734-2-david@redhat.com> In-Reply-To: <20200421085300.7734-1-david@redhat.com> References: <20200421085300.7734-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=david@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/21 03:31:23 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 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: Stefan Hajnoczi , Eduardo Habkost , Juan Quintela , "Michael S . Tsirkin" , David Hildenbrand , "Dr . David Alan Gilbert" , Peter Xu , Alex Williamson , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?b?w6k=?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Factor it out into common code when a new notifier is registered, just as done with the memory region notifier. This allows us to have the logic about how to process existing ram blocks at a central place (which will be extended soon). Just like when adding a new ram block, we have to register the max_length for now. We don't have a way to get notified about resizes yet, and some memory would not be mapped when growing the ram block. Note: Currently, ram blocks are only "fake resized". All memory (max_length) is accessible. We can get rid of a bunch of functions in stubs/ram-block.c . Print the warning from inside qemu_vfio_ram_block_added(). Reviewed-by: Peter Xu Cc: Richard Henderson Cc: Paolo Bonzini Cc: Eduardo Habkost Cc: Marcel Apfelbaum Cc: Alex Williamson Cc: Stefan Hajnoczi Cc: Peter Xu Signed-off-by: David Hildenbrand --- exec.c | 5 +++++ hw/core/numa.c | 14 ++++++++++++++ include/exec/cpu-common.h | 1 + util/vfio-helpers.c | 29 ++++++++--------------------- 4 files changed, 28 insertions(+), 21 deletions(-) diff --git a/exec.c b/exec.c index 2874bb5088..4f804347a6 100644 --- a/exec.c +++ b/exec.c @@ -1966,6 +1966,11 @@ ram_addr_t qemu_ram_get_used_length(RAMBlock *rb) return rb->used_length; } +ram_addr_t qemu_ram_get_max_length(RAMBlock *rb) +{ + return rb->max_length; +} + bool qemu_ram_is_shared(RAMBlock *rb) { return rb->flags & RAM_SHARED; diff --git a/hw/core/numa.c b/hw/core/numa.c index 316bc50d75..dc5e5b4046 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -854,9 +854,23 @@ void query_numa_node_mem(NumaNodeMem node_mem[], MachineState *ms) } } +static int ram_block_notify_add_single(RAMBlock *rb, void *opaque) +{ + const ram_addr_t max_size = qemu_ram_get_max_length(rb); + void *host = qemu_ram_get_host_addr(rb); + RAMBlockNotifier *notifier = opaque; + + if (host) { + notifier->ram_block_added(notifier, host, max_size); + } + return 0; +} + void ram_block_notifier_add(RAMBlockNotifier *n) { QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next); + /* Notify about all existing ram blocks. */ + qemu_ram_foreach_block(ram_block_notify_add_single, n); } void ram_block_notifier_remove(RAMBlockNotifier *n) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index b47e5630e7..09decb8d93 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -59,6 +59,7 @@ const char *qemu_ram_get_idstr(RAMBlock *rb); void *qemu_ram_get_host_addr(RAMBlock *rb); ram_addr_t qemu_ram_get_offset(RAMBlock *rb); ram_addr_t qemu_ram_get_used_length(RAMBlock *rb); +ram_addr_t qemu_ram_get_max_length(RAMBlock *rb); bool qemu_ram_is_shared(RAMBlock *rb); bool qemu_ram_is_uf_zeroable(RAMBlock *rb); void qemu_ram_set_uf_zeroable(RAMBlock *rb); diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c index ddd9a96e76..260570ae19 100644 --- a/util/vfio-helpers.c +++ b/util/vfio-helpers.c @@ -376,8 +376,14 @@ static void qemu_vfio_ram_block_added(RAMBlockNotifier *n, void *host, size_t size) { QEMUVFIOState *s = container_of(n, QEMUVFIOState, ram_notifier); + int ret; + trace_qemu_vfio_ram_block_added(s, host, size); - qemu_vfio_dma_map(s, host, size, false, NULL); + ret = qemu_vfio_dma_map(s, host, size, false, NULL); + if (ret) { + error_report("qemu_vfio_dma_map(%p, %zu) failed: %s", host, size, + strerror(-ret)); + } } static void qemu_vfio_ram_block_removed(RAMBlockNotifier *n, @@ -390,33 +396,14 @@ static void qemu_vfio_ram_block_removed(RAMBlockNotifier *n, } } -static int qemu_vfio_init_ramblock(RAMBlock *rb, void *opaque) -{ - void *host_addr = qemu_ram_get_host_addr(rb); - ram_addr_t length = qemu_ram_get_used_length(rb); - int ret; - QEMUVFIOState *s = opaque; - - if (!host_addr) { - return 0; - } - ret = qemu_vfio_dma_map(s, host_addr, length, false, NULL); - if (ret) { - fprintf(stderr, "qemu_vfio_init_ramblock: failed %p %" PRId64 "\n", - host_addr, (uint64_t)length); - } - return 0; -} - static void qemu_vfio_open_common(QEMUVFIOState *s) { qemu_mutex_init(&s->lock); s->ram_notifier.ram_block_added = qemu_vfio_ram_block_added; s->ram_notifier.ram_block_removed = qemu_vfio_ram_block_removed; - ram_block_notifier_add(&s->ram_notifier); s->low_water_mark = QEMU_VFIO_IOVA_MIN; s->high_water_mark = QEMU_VFIO_IOVA_MAX; - qemu_ram_foreach_block(qemu_vfio_init_ramblock, s); + ram_block_notifier_add(&s->ram_notifier); } /**