From patchwork Wed Aug 9 02:11:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gurchetan Singh X-Patchwork-Id: 13347332 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 0B85CC001DB for ; Wed, 9 Aug 2023 02:13:06 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qTYfP-00073G-1K; Tue, 08 Aug 2023 22:11:19 -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 1qTYfN-00072b-Ji for qemu-devel@nongnu.org; Tue, 08 Aug 2023 22:11:17 -0400 Received: from mail-pf1-x42d.google.com ([2607:f8b0:4864:20::42d]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qTYfK-00015E-4w for qemu-devel@nongnu.org; Tue, 08 Aug 2023 22:11:17 -0400 Received: by mail-pf1-x42d.google.com with SMTP id d2e1a72fcca58-686f8614ce5so6230411b3a.3 for ; Tue, 08 Aug 2023 19:11:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1691547072; x=1692151872; 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=KKHAKOsEYzDLZcWmqiaSywpW269TqPN1TbRX4nUZGOA=; b=WAECbuAOprG4EifuBdFRyi1YONBZlPpRSTYBvxhk0sSKVIJQr3pasQQ8fW4hZRoQIL JLh69SQcVfAQeXhj9iTwys/AWSooETdhPpiupGqfWHojwOZvGGtQbmTOwbm+isk1VVs8 7J1XOwua6egfnSBk3vU32kbn8ekjL21yp3uBc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691547072; x=1692151872; 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=KKHAKOsEYzDLZcWmqiaSywpW269TqPN1TbRX4nUZGOA=; b=KKxA4qD7WgWEQmKbdj5o3OkHl/Lwsk/PeirPOrtvP4wr/tuGdnFbho9Lj6a21WXwDz XTyTp3WgULoBqzCYzN5i24EK5f86AdTLgC1nftfWlBSd+qOmO5vIDVzXgKzJ3vELFKOt 1zKei9Sz+Rgm/FaNdqdaSjFq0P4kri4mwwdiInqf2p7gvKgDV8WOwgI2MidbRBws4oYb hTK4cd4sCBw/YB50HFY8YQ3vevixXRuAekzqEsYGGxBVDy1MCZWpSig1XUc1rpykCbZc K/omeacT9K3rqJQ6HPV3ytzhSxyS4g1BvK+Ccvf5vidrPd1ZVLxpQIUQAEkJnBY25CRh BMBA== X-Gm-Message-State: AOJu0Yx5Ve3DJSUy2nNr4e9o2rcwgv06OG/k2FbXK3aAC8PzIsY1upLB frvBVMqYEJ3s8kSU/sLROoDGuxZhrny8CmnKpackJw== X-Google-Smtp-Source: AGHT+IFICWrse8BBhPlgIoYp5SeDxn32Dljocl29fRVkHhrfyUkmuigcL5Mv0UJ3RCNsNgYWzdnumg== X-Received: by 2002:a05:6a20:12c3:b0:130:11e4:d693 with SMTP id v3-20020a056a2012c300b0013011e4d693mr1602902pzg.53.1691547072627; Tue, 08 Aug 2023 19:11:12 -0700 (PDT) Received: from gurchetansingh0.mtv.corp.google.com ([2620:15c:a7:2:a5a2:f074:e7af:41fe]) by smtp.gmail.com with ESMTPSA id a16-20020aa78650000000b00687494a59bfsm8681887pfo.61.2023.08.08.19.11.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Aug 2023 19:11:12 -0700 (PDT) From: Gurchetan Singh To: qemu-devel@nongnu.org Cc: marcandre.lureau@redhat.com, kraxel@redhat.com, akihiko.odaki@gmail.com, ray.huang@amd.com, alex.bennee@linaro.org, shentey@gmail.com, hi@alyssa.is, ernunes@redhat.com Subject: [PATCH v4 1/9] virtio: Add shared memory capability Date: Tue, 8 Aug 2023 19:11:00 -0700 Message-Id: <20230809021108.674-2-gurchetansingh@chromium.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20230809021108.674-1-gurchetansingh@chromium.org> References: <20230809021108.674-1-gurchetansingh@chromium.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42d; envelope-from=gurchetansingh@chromium.org; helo=mail-pf1-x42d.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, RCVD_IN_DNSWL_NONE=-0.0001, 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+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 Reviewed-by: Gurchetan Singh Signed-off-by: Gurchetan Singh Tested-by: Alyssa Ross Reviewed-by: Akihiko Odaki --- 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 edbc0daa18..da8c9ea12d 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 *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