From patchwork Fri Apr 21 01:12:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gurchetan Singh X-Patchwork-Id: 13219327 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 A314AC77B73 for ; Fri, 21 Apr 2023 01:13:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ppfKk-0002hE-55; Thu, 20 Apr 2023 21:13:08 -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 1ppfKL-0002bB-1r for qemu-devel@nongnu.org; Thu, 20 Apr 2023 21:12:41 -0400 Received: from mail-pj1-x102e.google.com ([2607:f8b0:4864:20::102e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ppfKA-0008KX-B7 for qemu-devel@nongnu.org; Thu, 20 Apr 2023 21:12:40 -0400 Received: by mail-pj1-x102e.google.com with SMTP id 98e67ed59e1d1-246fa478d45so1451014a91.3 for ; Thu, 20 Apr 2023 18:12:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1682039549; x=1684631549; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+1/aJ9cKYlVu/fza4q8BHTu511UJuh61NIe2fSyDtS0=; b=KxRoGc3j5LUc1tgSh6j7RX6rnB3+ku5ZcilsTyDNv2eA8nIWYWUySP4McEsuvI5yDm vDCgymPa5RxOqEEPOPRZCd1X/qXVjXq+zhS7pibfJW4cWSVpR+nyHqgU9gvi0QVycVD9 D4Grp4LgH6aNJllNuHDqJG77h3/m0GNmieFJU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682039549; x=1684631549; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+1/aJ9cKYlVu/fza4q8BHTu511UJuh61NIe2fSyDtS0=; b=QMdPHoqmiSDaz/V2V2xVKBKjV0PlxsDLE+h0dDGbqQsm1/rjH5SQ/Q+EYKUyyxVP2S 6usxUwfFwAKpT9C8AL+0D0HG3fAyYdGK+ZNgbYB1U8elIOMEJaCpSx2JGtr2AUOaiO6A BdAXpSSuHYpP3JbwenH0CuyS7CVtohD1Jqnks/ILEDqm2OrDkB2RfhhgAYKIxSivFpCf Ejn+mjpqkwV1u0tEaw5AmQaxNGvEKNmg7CMs6x14rxyf03epQdxRNKwYOgCO1zgHQscH Ru07bXiWTinqwGtvhbdipr7k7uWS3qCuBgIQqCKjZb2Apn3eLwSF6d1QBDDS1XlYCXLQ Zc7Q== X-Gm-Message-State: AAQBX9e/UPqrCjl1lGkqvxOsjTvgIBdrll4DTrZQVAa3asQo6r2BFlYU dtZ5v7GJi4FmJ7yekxeOTYpmm7EJZCykG92PIabIapg8 X-Google-Smtp-Source: AKy350agKVaE3oUxvUc2LJMEjMBEv/swjNSxEecHODiXvX+eZwhXp37KA0XL6eJaHQ4W5z6h8PIt8Q== X-Received: by 2002:a17:90b:1018:b0:247:6a93:1d56 with SMTP id gm24-20020a17090b101800b002476a931d56mr3208310pjb.22.1682039548814; Thu, 20 Apr 2023 18:12:28 -0700 (PDT) Received: from gurchetansingh0.mtv.corp.google.com ([2620:15c:a7:2:6625:6aa3:1b0e:a808]) by smtp.gmail.com with ESMTPSA id f4-20020a17090a8e8400b0024702e7c80fsm1697640pjo.23.2023.04.20.18.12.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Apr 2023 18:12:28 -0700 (PDT) From: Gurchetan Singh To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, philmd@linaro.org, david@redhat.com, stefanha@redhat.com, kraxel@redhat.com, marcandre.lureau@redhat.com, akihiko.odaki@gmail.com, dmitry.osipenko@collabora.com, ray.huang@amd.com, alex.bennee@linaro.org Subject: [RFC PATCH 01/13] virtio: Add shared memory capability Date: Thu, 20 Apr 2023 18:12:11 -0700 Message-Id: <20230421011223.718-2-gurchetansingh@chromium.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20230421011223.718-1-gurchetansingh@chromium.org> References: <20230421011223.718-1-gurchetansingh@chromium.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::102e; envelope-from=gurchetansingh@chromium.org; helo=mail-pj1-x102e.google.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, 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 --- 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 247325c193..08ba76fca2 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1399,6 +1399,24 @@ static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, return offset; } +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 = { + .cap.cap_len = sizeof cap, + .cap.cfg_type = VIRTIO_PCI_CAP_SHARED_MEMORY_CFG, + }; + + cap.cap.bar = bar; + cap.cap.length = cpu_to_le32(length); + cap.length_hi = cpu_to_le32(length >> 32); + cap.cap.offset = cpu_to_le32(offset); + cap.offset_hi = cpu_to_le32(offset >> 32); + cap.cap.id = 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 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_queues); void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq, int n, bool assign, bool with_irqfd); + +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, uint8_t bar, uint64_t offset, + uint64_t length, uint8_t id); + #endif