From nobody Tue Feb 10 13:17:51 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1697464528; cv=none; d=zohomail.com; s=zohoarc; b=OFABom8RF2kvvgt+VYA47DrYk/kfwiEtGL2UzHhI3z1MadLV4rfw2VNBIT9VEfLEDPBCwoEeIxosqXfifrKTgNFziAabe0wceZAuC23xTY+dYSu1u4L8olMWgXdfltfnMXA6hDA4WKfJ1oBqijYYmn3IwqlMrcn+3daQHcSU2kY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697464528; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=y4UO7LJWeQOldDb7doU+2QC3VHH3MbfI+zEeYDT86Dw=; b=aDHXXcyJPj4ilKGROE0nL/RMtH+lLgpQBYBDTdU4frvbzT4YO6xB7/LZqhMhVATAYTiw/+8nvMQMOv7kcgKCUGb/FMUM/ffDgrB1pq3mlKVl/4S21QERnm2hpras1lEXKbie7TJCcsB6UFBLYAhMm9fX7iGP0Cc8OtNfhI/9vWs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1697464528462396.6740815856581; Mon, 16 Oct 2023 06:55:28 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qsO34-0001En-Fs; Mon, 16 Oct 2023 09:54:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qsO33-0001ER-60 for qemu-devel@nongnu.org; Mon, 16 Oct 2023 09:54:21 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qsO2y-0005vX-OX for qemu-devel@nongnu.org; Mon, 16 Oct 2023 09:54:20 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-19-C5lB4DJOPpO_3B-zIt2cNw-1; Mon, 16 Oct 2023 09:54:12 -0400 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1078210264C1; Mon, 16 Oct 2023 13:54:12 +0000 (UTC) Received: from localhost (unknown [10.39.208.13]) by smtp.corp.redhat.com (Postfix) with ESMTP id DFE82492BFA; Mon, 16 Oct 2023 13:54:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697464456; 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: in-reply-to:in-reply-to:references:references; bh=y4UO7LJWeQOldDb7doU+2QC3VHH3MbfI+zEeYDT86Dw=; b=LMi8x2VJYxYKIo4+B0b9HFj4p6u03ZW8a/FDeYZOuaaWNuDp7QUtywjIhW3qssDKe/zzTF +HSDHIGXjSbzGnUnpmR7RxH70/Bkr+QPDZe80asfgXECzFPpiPiYTIiQPCE7GtkMTKXgWc BCLoYu7+QAAwVF5/rdwced4oYIla5TY= X-MC-Unique: C5lB4DJOPpO_3B-zIt2cNw-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: stefanha@redhat.com, "Dr. David Alan Gilbert" , Antonio Caggiano , Gurchetan Singh , "Michael S. Tsirkin" Subject: [PULL 1/9] virtio: Add shared memory capability Date: Mon, 16 Oct 2023 17:53:53 +0400 Message-ID: <20231016135404.899743-2-marcandre.lureau@redhat.com> In-Reply-To: <20231016135404.899743-1-marcandre.lureau@redhat.com> References: <20231016135404.899743-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1697464530190100001 Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" Define a new capability type 'VIRTIO_PCI_CAP_SHARED_MEMORY_CFG' to allow defining shared memory regions with sizes and offsets of 2^32 and more. Multiple instances of the capability are allowed and distinguished by a device-specific 'id'. Signed-off-by: Dr. David Alan Gilbert Signed-off-by: Antonio Caggiano Signed-off-by: Gurchetan Singh Tested-by: Alyssa Ross Tested-by: Huang Rui Tested-by: Akihiko Odaki Acked-by: Huang Rui Reviewed-by: Gurchetan Singh Reviewed-by: Akihiko Odaki --- include/hw/virtio/virtio-pci.h | 4 ++++ hw/virtio/virtio-pci.c | 18 ++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h index ab2051b64b..5a3f182f99 100644 --- a/include/hw/virtio/virtio-pci.h +++ b/include/hw/virtio/virtio-pci.h @@ -264,4 +264,8 @@ unsigned virtio_pci_optimal_num_queues(unsigned fixed_q= ueues); void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueu= e *vq, int n, bool assign, bool with_irqfd); + +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, uint8_t bar, uint64_t of= fset, + uint64_t length, uint8_t id); + #endif diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index abebd0075a..af1f4bc187 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1435,6 +1435,24 @@ static int virtio_pci_add_mem_cap(VirtIOPCIProxy *pr= oxy, return offset; } =20 +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, + uint8_t bar, uint64_t offset, uint64_t length, + uint8_t id) +{ + struct virtio_pci_cap64 cap =3D { + .cap.cap_len =3D sizeof cap, + .cap.cfg_type =3D VIRTIO_PCI_CAP_SHARED_MEMORY_CFG, + }; + + cap.cap.bar =3D bar; + cap.cap.length =3D cpu_to_le32(length); + cap.length_hi =3D cpu_to_le32(length >> 32); + cap.cap.offset =3D cpu_to_le32(offset); + cap.offset_hi =3D cpu_to_le32(offset >> 32); + cap.cap.id =3D id; + return virtio_pci_add_mem_cap(proxy, &cap.cap); +} + static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, unsigned size) { --=20 2.41.0