From patchwork Tue Jul 11 02:56:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gurchetan Singh X-Patchwork-Id: 13308020 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 A31BEEB64D9 for ; Tue, 11 Jul 2023 02:58:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qJ3Yg-00035q-BM; Mon, 10 Jul 2023 22:56:58 -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 1qJ3Ye-000352-U0 for qemu-devel@nongnu.org; Mon, 10 Jul 2023 22:56:56 -0400 Received: from mail-oi1-x232.google.com ([2607:f8b0:4864:20::232]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qJ3Yd-0005Od-Bq for qemu-devel@nongnu.org; Mon, 10 Jul 2023 22:56:56 -0400 Received: by mail-oi1-x232.google.com with SMTP id 5614622812f47-3942c6584f0so3690828b6e.3 for ; Mon, 10 Jul 2023 19:56:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1689044213; x=1691636213; 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=nW6NVEolDAxSU/Kpub9499MjuEQqXpgbqePIxcarQ8Y=; b=C7iOjufoUABE/OZFBBbefscfKBLY9TDWzFWmPb4L4rGUSNNPK9m7AandrsZpj7vZAt K7jN1w+lA/dYQApV3ZNIt2JH+Q5x5k6sPZIktNIW1KknmoXRBsIU58v0DhDuPHQ35d4I qnXPfzDOG32+sAtYLlZ0LCZq0kVwy1i9FORGs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689044213; x=1691636213; 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=nW6NVEolDAxSU/Kpub9499MjuEQqXpgbqePIxcarQ8Y=; b=JD6ZhojkPzMHwNaRuImpuD47T/NjHRn9pRwV+o5M8w4z/lhtVlU+TZU9krIyVSSQe1 gTK4bu+hASOkMOy1rymbGpgZjXg3X10ejdWhFO4TPDRDp4AlgtrKJ/ruYUMahL2m1syv FP4y6wGj3iQXtc9FrueBMY+4+JFQUbefG4mP1M8jNHxfRa2w4pSPXremvQQrdqAdGmw8 UU8JsxvnagIwI6iDQkW/KW/8A7G3k0zrjNi1v72mpvXzBGiP3t+nBArZcERi1vMYi+wP PlljM7drWDmqs9/JubKJ1rmDKqB0mMns322dkSyXbWd2wI2ZJDfUZ2X1Kw83y6Hia4bx ehZA== X-Gm-Message-State: ABy/qLYX5DgDHPejYaJ8Ea1khvI5qANKwf+May4HSuXa75kYW4q0nK7U Gsiep6t0M/727GG868B4FskFzRUWIcdJ5Ai4PTA= X-Google-Smtp-Source: APBJJlHZLB2QEsVTFzxlWPftJhhG9iCptwwa56ooogJSp4rgigZrV9eay76Rxfd6MFHEHm9/zVfCMw== X-Received: by 2002:a54:418e:0:b0:3a3:940d:1fba with SMTP id 14-20020a54418e000000b003a3940d1fbamr12317537oiy.33.1689044213501; Mon, 10 Jul 2023 19:56:53 -0700 (PDT) Received: from gurchetansingh0.mtv.corp.google.com ([2620:15c:a7:2:9292:a9df:b174:f1eb]) by smtp.gmail.com with ESMTPSA id fk13-20020a056a003a8d00b0067903510abbsm474614pfb.163.2023.07.10.19.56.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jul 2023 19:56:53 -0700 (PDT) From: Gurchetan Singh To: qemu-devel@nongnu.org Cc: --cc=kraxel@redhat.com, marcandre.lureau@redhat.com, akihiko.odaki@gmail.com, dmitry.osipenko@collabora.com, ray.huang@amd.com, alex.bennee@linaro.org, shentey@gmail.com Subject: [PATCH v1 1/9] virtio: Add shared memory capability Date: Mon, 10 Jul 2023 19:56:41 -0700 Message-Id: <20230711025649.708-2-gurchetansingh@chromium.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20230711025649.708-1-gurchetansingh@chromium.org> References: <20230711025649.708-1-gurchetansingh@chromium.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::232; envelope-from=gurchetansingh@chromium.org; helo=mail-oi1-x232.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, 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 Reviewed-by: Gurchetan Singh Signed-off-by: Gurchetan Singh 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