From nobody Mon Feb 9 12:25:58 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=collabora.com ARC-Seal: i=1; a=rsa-sha256; t=1663593882; cv=none; d=zohomail.com; s=zohoarc; b=ZvRXqEVI2B4Ezan5nd3829/Mh8daKSJ3m61PYkZ2vMm6Cax9G2tF4r2Egt9Rv74KtPmf5cyTAB7B06pupNCtr8K3ysz5r0esPjNEzU6OrJpJ5/N3iDgMnWvnukL80CnoQE9ZDEpf01FlHIPuIkzsAAHWeEdT3VuRDPmSMEU8rQg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1663593882; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=Mvs+Azjl2kevaCcI3CVHIXqVSNeS6aDUYN0gU6+A/QM=; b=YMf5WAXuLTJAnO89uIjnyVNyAZxURnNcmfXGRUDWHT0ZneGfENXJ6LnVw86DCAleo+KrC15B1cbXA38e0g9FsvCB65yjp/Ke7ocOZaHyxEZlICmPC2I++vBU/O6AXmxBZsSnGFscBFOI3jCsosevGPwT8XZX0/JcZRqj2HRDJ4Q= 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 1663593882548923.7565808364169; Mon, 19 Sep 2022 06:24:42 -0700 (PDT) Received: from localhost ([::1]:37974 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oaGlN-00016S-D3 for importer@patchew.org; Mon, 19 Sep 2022 09:24:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56800) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oaGeI-0008NN-O7 for qemu-devel@nongnu.org; Mon, 19 Sep 2022 09:17:36 -0400 Received: from madras.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e5ab]:55406) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oaGeG-00067c-7u for qemu-devel@nongnu.org; Mon, 19 Sep 2022 09:17:22 -0400 Received: from dellino.fritz.box (host-82-49-101-130.retail.telecomitalia.it [82.49.101.130]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: fahien) by madras.collabora.co.uk (Postfix) with ESMTPSA id 669C266019EE; Mon, 19 Sep 2022 14:17:16 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1663593436; bh=I7xKQXYoZG40sEbey3ZyL/b1CNjsa17oI2aGBWEKpOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JgIWS78JSZFV+2UuMjkT7e+6dymz1Mte1Qorcr6/k5I5eNFpOYjeArfkG+FkDVDOi XjWqfBu+R2A0Fk03olueuteQBdzGjvPKBCaH6m8OVT7Qyzt3UR3m8LSIqck7TqwhRs HGfCCGsTGBTC3TKcK+/0EDSVzStR9JBqcf3HOywQ01xhZ/oP665+P2XSPhr69tSOD2 MqzKyZZ0k8Fo6kQDD5L3EyMseVXgvaQ7AWiwCVUEsGp8ht4/WUz7lt0UMtEeiwjfT9 7bNpIXwyPHWbATg0mW5hFa4XBvkcTeX03w3zx963hC3LoIumONTH/zq/iay3b1VIP2 bqkDLyM38o71g== From: Antonio Caggiano To: qemu-devel@nongnu.org Cc: gert.wollny@collabora.com, dmitry.osipenko@collabora.com, "Dr. David Alan Gilbert" , "Michael S. Tsirkin" Subject: [PATCH v3 1/4] virtio: Add shared memory capability Date: Mon, 19 Sep 2022 15:16:59 +0200 Message-Id: <20220919131702.94875-2-antonio.caggiano@collabora.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220919131702.94875-1-antonio.caggiano@collabora.com> References: <20220919131702.94875-1-antonio.caggiano@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2a00:1098:0:82:1000:25:2eeb:e5ab; envelope-from=antonio.caggiano@collabora.com; helo=madras.collabora.co.uk 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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" X-ZohoMail-DKIM: pass (identity @collabora.com) X-ZM-MESSAGEID: 1663593883609100001 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 --- v2: Remove virtio_pci_shm_cap as virtio_pci_cap64 is used instead. v3: No need for mask32 as cpu_to_le32 truncates the value. hw/virtio/virtio-pci.c | 18 ++++++++++++++++++ include/hw/virtio/virtio-pci.h | 4 ++++ 2 files changed, 22 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index a50c5a57d7..377bb06fec 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1169,6 +1169,24 @@ 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) { diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h index 2446dcd9ae..5e5c4a4c6d 100644 --- a/include/hw/virtio/virtio-pci.h +++ b/include/hw/virtio/virtio-pci.h @@ -252,4 +252,8 @@ void virtio_pci_types_register(const VirtioPCIDeviceTyp= eInfo *t); */ unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues); =20 +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, + uint8_t bar, uint64_t offset, uint64_t length, + uint8_t id); + #endif --=20 2.34.1