From nobody Mon Feb 9 22:20:02 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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=fail(p=none dis=none) header.from=collabora.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1636563035252588.7343600523142; Wed, 10 Nov 2021 08:50:35 -0800 (PST) Received: from localhost ([::1]:38458 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mkqnx-0001hl-QY for importer@patchew.org; Wed, 10 Nov 2021 11:50:33 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59542) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkqgL-00012W-PK for qemu-devel@nongnu.org; Wed, 10 Nov 2021 11:42:41 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:36770) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkqgJ-0006xF-0T for qemu-devel@nongnu.org; Wed, 10 Nov 2021 11:42:41 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: fahien) with ESMTPSA id 480CE1F44E6C DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=collabora.com; s=mail; t=1636562556; bh=BzAVUSbM81OmBWhtZV35lvGOdAxZbe9SlPSp83z/RC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EZr5jerw9DGNZ1AAfK2IKPyP3lDZ72+xQUDUqxf5krsSK7ol/iEHjDw+mmPmAjgUl NGl1O9g66+70lZAZhxyuHrzpJMGYm5bwVJmKcSkfRN0N7Swui+J7k5u5CqcHQUOY6g uWgG4i5I0LzxWHBapwk9u9G5oWFwYTIUZXUjnCKHwDiwrlABgp8phiztbcKWnoDP1a 6zo/5lZYty0s77wuP0GSvF74RKf5vmo0gPo8UbBwEshs6/7AHpBgnx35DjDjng13RF sEaZKXTvWK6xhvDea+1vj0EUyBdMhW43d+cASDjgQqW94/Anlruf+FM4qpcEe9rZas 4zECYQKZzAi8A== From: Antonio Caggiano To: qemu-devel@nongnu.org Subject: [PATCH 2/2] virtio: Add shared memory capability Date: Wed, 10 Nov 2021 17:42:20 +0100 Message-Id: <20211110164220.273641-3-antonio.caggiano@collabora.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211110164220.273641-1-antonio.caggiano@collabora.com> References: <20211110164220.273641-1-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=46.235.227.227; envelope-from=antonio.caggiano@collabora.com; helo=bhuna.collabora.co.uk X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=no 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: "Dr. David Alan Gilbert" , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1636563036949100001 Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" Define a new capability type 'VIRTIO_PCI_CAP_SHARED_MEMORY_CFG' and the data structure 'virtio_pci_shm_cap' to go with it. They 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'. v2: Remove virtio_pci_shm_cap as virtio_pci_cap64 is used instead. Signed-off-by: Dr. David Alan Gilbert (cherry picked from commit a5d628a3a3c5e60b98b15ffff197c36a77056115) Signed-off-by: Antonio Caggiano --- hw/virtio/virtio-pci.c | 19 +++++++++++++++++++ hw/virtio/virtio-pci.h | 4 ++++ 2 files changed, 23 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 750aa47ec1..8152d3c1b3 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1162,6 +1162,25 @@ 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, + }; + uint32_t mask32 =3D ~0; + + cap.cap.bar =3D bar; + cap.cap.length =3D cpu_to_le32(length & mask32); + cap.length_hi =3D cpu_to_le32((length >> 32) & mask32); + cap.cap.offset =3D cpu_to_le32(offset & mask32); + cap.offset_hi =3D cpu_to_le32((offset >> 32) & mask32); + 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/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 2446dcd9ae..5e5c4a4c6d 100644 --- a/hw/virtio/virtio-pci.h +++ b/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 2.32.0