From nobody Fri Apr 19 00:19:59 2024 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=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1614231473; cv=none; d=zohomail.com; s=zohoarc; b=MGsqJ9jiZ2UaG4HJkB2Ervxu4u7ub7/j2vlw7x7Kxh3dWNO+k9C5pn2ui3pWm2Lpe5gAcuIDryefuN4A7DnLy1FWg9tU8lViJ5ZKInRe+GxKwDnVXoBS3I2Mu9ICl8zGbHxlmsU6hSB9nX+WNDZNp+oekOZSnEgjUGhz2QGGNW4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1614231473; 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=B8SDnx237dYg9O16S6bMrUw7sE1vxEBsTTpQo2JjZeg=; b=LQ+kAeqy78kFRPAlRlq5Ja42dUGceVc8UEAsLOgddIMDH2iJl2cquQ3fnvatnD90AsfeEZ5eBne0eWbYLXOaZ5MGmkO6nz9fKTagUnjgMlsp6T4PeHR/UOBk/KvOAWQbGowSIjLQ0vBMLIdV8pcpH0nel5TFrfFI5aTarrcSE10= ARC-Authentication-Results: i=1; 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 header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1614231473940267.7155494997879; Wed, 24 Feb 2021 21:37:53 -0800 (PST) Received: from localhost ([::1]:38332 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lF9LU-00086O-RT for importer@patchew.org; Thu, 25 Feb 2021 00:37:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:56902) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lF9K4-0007AR-RX; Thu, 25 Feb 2021 00:36:24 -0500 Received: from mail-io1-xd29.google.com ([2607:f8b0:4864:20::d29]:33021) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lF9K3-0008R8-4A; Thu, 25 Feb 2021 00:36:24 -0500 Received: by mail-io1-xd29.google.com with SMTP id e2so1367284iog.0; Wed, 24 Feb 2021 21:36:21 -0800 (PST) Received: from localhost (ec2-3-14-82-192.us-east-2.compute.amazonaws.com. [3.14.82.192]) by smtp.gmail.com with ESMTPSA id o131sm2698236ila.5.2021.02.24.21.36.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Feb 2021 21:36:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=B8SDnx237dYg9O16S6bMrUw7sE1vxEBsTTpQo2JjZeg=; b=QqGZWL232vs6T0Vju73pSW1Ctd5EwNmJbxCkxbN6qSmJhgyOwcHs9yDM8JudRS3Bcy Edjdbai7hOIywZSB7w9wmHLpaSZjgI7HgY1BSaDk2U1CEAoahcp1iDYSfUbHXorDDQfD MB0kwmN13lBgUyeEWnsuURt+jtzJ20xfE7n/3dXhK4RV7MXPk+5UxQVt3xzKks6UCwrD c33Ob+f8jqku58HBla5b6u5KIOfudCaVjk37Zr63/hmc+T7iFn85J1c66JeW0+bHBjKt Qbr3NsRJsfm/Y3ZOP7wlmuf7665a9B9pcp1feeu046rfTLAGeAb1/imhmeoEcM6LOEGO biOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=B8SDnx237dYg9O16S6bMrUw7sE1vxEBsTTpQo2JjZeg=; b=QgwiX3FnGz1B7D/UeXTi3gIz7pklf3poP4FRVWC5bwix3n5JqWwvYe0kZMu+tVhFv4 HOBH5I062hglmLCQgDBaERzDGIYacA38K6tq+hibkkOnFqrUohiZcMpckQ6oX3AYqvOp 0f1lRzXbo+7y4mw7aIVGYFDDC9xC2cLEYiBD1J+gzFtDwgol7XrDYoD1S9U0O6reJhI1 r40mH4leMUZNkfptuZxNCcJlE+jm+jU6L7xw3TkOEY9el0vhvq2ad93bZkEjbb+3yV0K lmaKwO/kauR0FtEuAGZyIitDufVPieVAz6nBIV4Z9K1lgcLL7oD7+wFDZ5SDfGk327+V sxhg== X-Gm-Message-State: AOAM532aQGfFjVH/DxINABwZ+hPzwYDTqpJ7vGK5tbf4OirxAWNLXeCe Npt1uS+MKpPoSJcTeYbDuLjlZWkD9wTuKoQDMF0= X-Google-Smtp-Source: ABdhPJwQKZOsH31NdN3HPhXuAhpq8CMoirNIIrds0gH/F9zDXdv28qniFoNs4SzyE2n78gAOJblVZQ== X-Received: by 2002:a02:b61a:: with SMTP id h26mr1586877jam.90.1614231380828; Wed, 24 Feb 2021 21:36:20 -0800 (PST) From: schspa To: qemu-devel@nongnu.org Subject: [PATCH v4] virtio-mmio: improve virtio-mmio get_dev_path alog Date: Thu, 25 Feb 2021 13:36:06 +0800 Message-Id: <20210225053606.385884-1-schspa@gmail.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: References: 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=2607:f8b0:4864:20::d29; envelope-from=schspa@gmail.com; helo=mail-io1-xd29.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, schspa@gmail.com, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" At the moment the following QEMU command line triggers an assertion failure On xlnx-versal SOC: qemu-system-aarch64 \ -machine xlnx-versal-virt -nographic -smp 2 -m 128 \ -fsdev local,id=3Dshareid,path=3D${HOME}/work,security_model=3Dnone \ -device virtio-9p-device,fsdev=3Dshareid,mount_tag=3Dshare \ -fsdev local,id=3Dshareid1,path=3D${HOME}/Music,security_model=3Dnone= \ -device virtio-9p-device,fsdev=3Dshareid1,mount_tag=3Dshare1 qemu-system-aarch64: ../migration/savevm.c:860: vmstate_register_with_alias_id: Assertion `!se->compat || se->instance_id =3D=3D 0' failed. This problem was fixed on arm virt platform in commit f58b39d2d5b ("virtio-mmio: format transport base address in BusClass.get_dev_path") It works perfectly on arm virt platform. but there is still there on xlnx-versal SOC. The main difference between arm virt and xlnx-versal is they use different way to create virtio-mmio qdev. on arm virt, it calls sysbus_create_simple("virtio-mmio", base, pic[irq]); which will call sysbus_mmio_map internally and assign base address to subsys device mmio correctly. but xlnx-versal's implements won't do this. However, xlnx-versal can't switch to sysbus_create_simple() to create virtio-mmio device. It's because xlnx-versal's cpu use VersalVirt.soc.fpd.apu.mr as it's memory. which is subregion of system_memory. sysbus_create_simple will add virtio to system_memory, which can't be accessed by cpu. Besides, xlnx-versal can't add sysbus_mmio_map api call too, because this will add memory region to system_memory, and it can't be added to VersalVirt.soc.fpd.apu.mr again. We can solve this by assign correct base address offset on dev_path. This path was test on aarch64 virt & xlnx-versal platform. Signed-off-by: schspa Reviewed-by: Peter Maydell --- hw/virtio/virtio-mmio.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 610661d6a5..6990b9879c 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -737,8 +737,8 @@ static char *virtio_mmio_bus_get_dev_path(DeviceState *= dev) BusState *virtio_mmio_bus; VirtIOMMIOProxy *virtio_mmio_proxy; char *proxy_path; - SysBusDevice *proxy_sbd; char *path; + MemoryRegionSection section; =20 virtio_mmio_bus =3D qdev_get_parent_bus(dev); virtio_mmio_proxy =3D VIRTIO_MMIO(virtio_mmio_bus->parent); @@ -757,17 +757,18 @@ static char *virtio_mmio_bus_get_dev_path(DeviceState= *dev) } =20 /* Otherwise, we append the base address of the transport. */ - proxy_sbd =3D SYS_BUS_DEVICE(virtio_mmio_proxy); - assert(proxy_sbd->num_mmio =3D=3D 1); - assert(proxy_sbd->mmio[0].memory =3D=3D &virtio_mmio_proxy->iomem); + section =3D memory_region_find(&virtio_mmio_proxy->iomem, 0, 0x200); + assert(section.mr); =20 if (proxy_path) { path =3D g_strdup_printf("%s/virtio-mmio@" TARGET_FMT_plx, proxy_p= ath, - proxy_sbd->mmio[0].addr); + section.offset_within_address_space); } else { path =3D g_strdup_printf("virtio-mmio@" TARGET_FMT_plx, - proxy_sbd->mmio[0].addr); + section.offset_within_address_space); } + memory_region_unref(section.mr); + g_free(proxy_path); return path; } --=20 2.30.1