From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A659CC433EF for ; Sun, 27 Feb 2022 13:52:08 +0000 (UTC) Received: from localhost ([::1]:47592 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nOJy3-0004Fz-I5 for qemu-devel@archiver.kernel.org; Sun, 27 Feb 2022 08:52:07 -0500 Received: from eggs.gnu.org ([209.51.188.92]:48696) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nOJst-0007Gu-GD for qemu-devel@nongnu.org; Sun, 27 Feb 2022 08:46:47 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:46554) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nOJsr-0000Ch-V9 for qemu-devel@nongnu.org; Sun, 27 Feb 2022 08:46:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645969605; 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=7POS3oh0SWMOBGbYh/7A68xJRGmQSOcU1LHkq3dTedY=; b=DUvjWDTsh/0u6SWUaALHdf6XeNinCwrepHZqld3AnJuW6eXnGv3AWBd4gSHic+D/Mqc2zl 3NNkGvx3H6SC0J7ZY+5jJRpY2Dvz490zF28iDGdVslodhVtnKDHI7bWqAg0bpuEvqbTYw6 /W9FhVW1ItYvWIvLG7y1WnlgpQtKz8Q= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-504-WgoSF20EPe6s0lWqVH9Wpw-1; Sun, 27 Feb 2022 08:46:42 -0500 X-MC-Unique: WgoSF20EPe6s0lWqVH9Wpw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5B8D151DF; Sun, 27 Feb 2022 13:46:40 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.81]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5BF4984979; Sun, 27 Feb 2022 13:46:09 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [PATCH v2 05/14] virtio: Add vhost_shadow_vq_get_vring_addr Date: Sun, 27 Feb 2022 14:41:02 +0100 Message-Id: <20220227134111.3254066-6-eperezma@redhat.com> In-Reply-To: <20220227134111.3254066-1-eperezma@redhat.com> References: <20220227134111.3254066-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eperezma@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Michael S. Tsirkin" , Jason Wang , Peter Xu , virtualization@lists.linux-foundation.org, Eli Cohen , Eric Blake , Parav Pandit , Cindy Lu , "Fangyi \(Eric\)" , Markus Armbruster , yebiaoxiang@huawei.com, Liuxiangdong , Stefano Garzarella , Laurent Vivier , Eduardo Habkost , Richard Henderson , Gautam Dawar , Xiao W Wang , Stefan Hajnoczi , Juan Quintela , Harpreet Singh Anand , Paolo Bonzini , Lingshan Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" It reports the shadow virtqueue address from qemu virtual address space. Since this will be different from the guest's vaddr, but the device can access it, SVQ takes special care about its alignment & lack of garbage data. It assumes that IOMMU will work in host_page_size ranges for that. Signed-off-by: Eugenio Pérez --- hw/virtio/vhost-shadow-virtqueue.h | 9 +++++++++ hw/virtio/vhost-shadow-virtqueue.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-virtqueue.h index 84747655ad..3bbea77082 100644 --- a/hw/virtio/vhost-shadow-virtqueue.h +++ b/hw/virtio/vhost-shadow-virtqueue.h @@ -11,9 +11,14 @@ #define VHOST_SHADOW_VIRTQUEUE_H #include "qemu/event_notifier.h" +#include "hw/virtio/virtio.h" +#include "standard-headers/linux/vhost_types.h" /* Shadow virtqueue to relay notifications */ typedef struct VhostShadowVirtqueue { + /* Shadow vring */ + struct vring vring; + /* Shadow kick notifier, sent to vhost */ EventNotifier hdev_kick; /* Shadow call notifier, sent to vhost */ @@ -37,6 +42,10 @@ bool vhost_svq_valid_features(uint64_t *features); void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd); void vhost_svq_set_guest_call_notifier(VhostShadowVirtqueue *svq, int call_fd); +void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq, + struct vhost_vring_addr *addr); +size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq); +size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq); void vhost_svq_stop(VhostShadowVirtqueue *svq); diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index 34354aea2c..2150e2b071 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -94,6 +94,35 @@ void vhost_svq_set_guest_call_notifier(VhostShadowVirtqueue *svq, int call_fd) } } +/* + * Get the shadow vq vring address. + * @svq Shadow virtqueue + * @addr Destination to store address + */ +void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq, + struct vhost_vring_addr *addr) +{ + addr->desc_user_addr = (uint64_t)svq->vring.desc; + addr->avail_user_addr = (uint64_t)svq->vring.avail; + addr->used_user_addr = (uint64_t)svq->vring.used; +} + +size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq) +{ + size_t desc_size = sizeof(vring_desc_t) * svq->vring.num; + size_t avail_size = offsetof(vring_avail_t, ring) + + sizeof(uint16_t) * svq->vring.num; + + return ROUND_UP(desc_size + avail_size, qemu_real_host_page_size); +} + +size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq) +{ + size_t used_size = offsetof(vring_used_t, ring) + + sizeof(vring_used_elem_t) * svq->vring.num; + return ROUND_UP(used_size, qemu_real_host_page_size); +} + /** * Set a new file descriptor for the guest to kick the SVQ and notify for avail * -- 2.27.0