From nobody Sun Feb 8 04:18:12 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1513021885526598.2085575667057; Mon, 11 Dec 2017 11:51:25 -0800 (PST) Received: from localhost ([::1]:55218 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOU6h-0004PG-4m for importer@patchew.org; Mon, 11 Dec 2017 14:51:19 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33873) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOU1y-00086R-28 for qemu-devel@nongnu.org; Mon, 11 Dec 2017 14:46:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eOU1x-0006fX-A3 for qemu-devel@nongnu.org; Mon, 11 Dec 2017 14:46:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49888) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eOU1x-0006dv-49 for qemu-devel@nongnu.org; Mon, 11 Dec 2017 14:46:25 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 37CA85D68B; Mon, 11 Dec 2017 19:46:24 +0000 (UTC) Received: from dgilbert-t530.redhat.com (ovpn-117-205.ams2.redhat.com [10.36.117.205]) by smtp.corp.redhat.com (Postfix) with ESMTP id E180A605FB; Mon, 11 Dec 2017 19:46:21 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, imammedo@redhat.com Date: Mon, 11 Dec 2017 19:46:06 +0000 Message-Id: <20171211194610.3962-5-dgilbert@redhat.com> In-Reply-To: <20171211194610.3962-1-dgilbert@redhat.com> References: <20171211194610.3962-1-dgilbert@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Mon, 11 Dec 2017 19:46:24 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 4/8] vhost: New memory update functions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maxime.coquelin@redhat.com, groug@kaod.org, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" vhost_update_mem will replace the existing update mechanism. They make use of the Flatview we have now to make the update simpler. This commit just adds the basic structure. Signed-off-by: Dr. David Alan Gilbert --- hw/virtio/vhost.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index c7ce7baf9b..6d720036db 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -634,11 +634,51 @@ static void vhost_begin(MemoryListener *listener) dev->mem_changed_start_addr =3D -1; } =20 +struct vhost_update_mem_tmp { + struct vhost_dev *dev; + uint32_t nregions; + struct vhost_memory_region *regions; +}; + +/* Called for each MRS from vhost_update_mem */ +static int vhost_update_mem_cb(MemoryRegionSection *mrs, void *opaque) +{ + if (!vhost_section(mrs)) { + return 0; + } + + /* TODO */ + return 0; +} + +static int vhost_update_mem(struct vhost_dev *dev, bool *changed) +{ + int res; + struct vhost_update_mem_tmp vtmp; + vtmp.regions =3D 0; + vtmp.nregions =3D 0; + vtmp.dev =3D dev; + + *changed =3D false; + res =3D address_space_iterate(&address_space_memory, + vhost_update_mem_cb, &vtmp); + if (res) { + goto out; + } + + /* TODO */ + *changed =3D dev->mem_changed_start_addr < dev->mem_changed_end_addr; +out: + g_free(vtmp.regions); + return res; +} + static void vhost_commit(MemoryListener *listener) { struct vhost_dev *dev =3D container_of(listener, struct vhost_dev, memory_listener); uint64_t log_size; + bool changed; int r; =20 if (!dev->memory_changed) { @@ -647,7 +687,12 @@ static void vhost_commit(MemoryListener *listener) if (!dev->started) { return; } - if (dev->mem_changed_start_addr > dev->mem_changed_end_addr) { + if (vhost_update_mem(dev, &changed)) { + return; + } + + if (!changed) { + /* None of the mappings we care about changed */ return; } =20 @@ -1523,6 +1568,7 @@ void vhost_ack_features(struct vhost_dev *hdev, const= int *feature_bits, int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) { int i, r; + bool changed; =20 /* should only be called after backend is connected */ assert(hdev->vhost_ops); @@ -1535,6 +1581,9 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODev= ice *vdev) goto fail_features; } =20 + if (vhost_update_mem(hdev, &changed)) { + goto fail_mem; + } if (vhost_dev_has_iommu(hdev)) { memory_listener_register(&hdev->iommu_listener, vdev->dma_as); } --=20 2.14.3