From patchwork Mon Apr 24 23:15:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 676645 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE50BC7EE20 for ; Mon, 24 Apr 2023 23:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233217AbjDXXRk (ORCPT ); Mon, 24 Apr 2023 19:17:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229888AbjDXXRT (ORCPT ); Mon, 24 Apr 2023 19:17:19 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 673A1AD0F; Mon, 24 Apr 2023 16:16:58 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33OKrUTD011653; Mon, 24 Apr 2023 23:16:42 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=M4qKa16MTTZbgPFcRsEu9XCIL+sGrLzulOifFodRCz4=; b=Oc04rmgqMNTrspBfxgNxGPzJ/M0G6moR6QZMuHsNJ21Y6Ieux1uIXj9BsFOSda8F17MR UKqxJSoN+QboD6L82e5OAbezJRzK/xHQ5wLJR81OxcBttZ4T2J1dEXLxGzVkeL6olk+t u81vY6Ymi+JMgTP5+53G/f7j2s7hwIw17H6STJOstP9S390XiqVBb6TJzff7GuA72ezb OT04kyS0WV2zRsifyL8nLxaJgBooMtW3o7sAqkQ04WVoExcfEZ1UEaIIAuoakqvt83Ue rM1tIhn688wiZl4Tvqd3ugmRkghhcjl66YMF29Q4z9UaOy8kk3N15P2Lu1nleq7k0SJX GA== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3q5ndpswer-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Apr 2023 23:16:41 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 33ONGea0024380 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 Apr 2023 23:16:40 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Mon, 24 Apr 2023 16:16:40 -0700 From: Elliot Berman To: Alex Elder , Srinivas Kandagatla , Jonathan Corbet , "Elliot Berman" , Prakruthi Deepak Heragu CC: Murali Nalajala , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Dmitry Baryshkov , Bjorn Andersson , "Konrad Dybcio" , Arnd Bergmann , "Greg Kroah-Hartman" , Rob Herring , Krzysztof Kozlowski , Bagas Sanjaya , Will Deacon , Andy Gross , Catalin Marinas , Jassi Brar , , , , , Subject: [PATCH v12 09/25] gunyah: vm_mgr: Introduce basic VM Manager Date: Mon, 24 Apr 2023 16:15:42 -0700 Message-ID: <20230424231558.70911-10-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230424231558.70911-1-quic_eberman@quicinc.com> References: <20230424231558.70911-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: FwvupmiZLI9DjZnE2Ms6ToZ5el5_cASy X-Proofpoint-ORIG-GUID: FwvupmiZLI9DjZnE2Ms6ToZ5el5_cASy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-24_11,2023-04-21_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 impostorscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304240211 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Gunyah VM manager is a kernel moduel which exposes an interface to Gunyah userspace to load, run, and interact with other Gunyah virtual machines. The interface is a character device at /dev/gunyah. Add a basic VM manager driver. Upcoming patches will add more ioctls into this driver. Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman --- .../userspace-api/ioctl/ioctl-number.rst | 1 + drivers/virt/gunyah/Makefile | 2 +- drivers/virt/gunyah/rsc_mgr.c | 50 +++++++++- drivers/virt/gunyah/vm_mgr.c | 93 +++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 20 ++++ include/uapi/linux/gunyah.h | 23 +++++ 6 files changed, 187 insertions(+), 2 deletions(-) create mode 100644 drivers/virt/gunyah/vm_mgr.c create mode 100644 drivers/virt/gunyah/vm_mgr.h create mode 100644 include/uapi/linux/gunyah.h diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index 0a1882e296ae..2513324ae7be 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -137,6 +137,7 @@ Code Seq# Include File Comments 'F' DD video/sstfb.h conflict! 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! 'G' 00-0F xen/gntalloc.h, xen/gntdev.h conflict! +'G' 00-0f linux/gunyah.h conflict! 'H' 00-7F linux/hiddev.h conflict! 'H' 00-0F linux/hidraw.h conflict! 'H' 01 linux/mei.h conflict! diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile index 241bab357b86..e47e25895299 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 -gunyah-y += rsc_mgr.o rsc_mgr_rpc.o +gunyah-y += rsc_mgr.o rsc_mgr_rpc.o vm_mgr.o obj-$(CONFIG_GUNYAH) += gunyah.o diff --git a/drivers/virt/gunyah/rsc_mgr.c b/drivers/virt/gunyah/rsc_mgr.c index 57a39f35d4c2..99c5d03bb698 100644 --- a/drivers/virt/gunyah/rsc_mgr.c +++ b/drivers/virt/gunyah/rsc_mgr.c @@ -15,8 +15,10 @@ #include #include #include +#include #include "rsc_mgr.h" +#include "vm_mgr.h" #define RM_RPC_API_VERSION_MASK GENMASK(3, 0) #define RM_RPC_HEADER_WORDS_MASK GENMASK(7, 4) @@ -130,6 +132,7 @@ struct gh_rm_connection { * @cache: cache for allocating Tx messages * @send_lock: synchronization to allow only one request to be sent at a time * @nh: notifier chain for clients interested in RM notification messages + * @miscdev: /dev/gunyah */ struct gh_rm { struct device *dev; @@ -146,6 +149,8 @@ struct gh_rm { struct kmem_cache *cache; struct mutex send_lock; struct blocking_notifier_head nh; + + struct miscdevice miscdev; }; /** @@ -581,6 +586,33 @@ int gh_rm_notifier_unregister(struct gh_rm *rm, struct notifier_block *nb) } EXPORT_SYMBOL_GPL(gh_rm_notifier_unregister); +struct device *gh_rm_get(struct gh_rm *rm) +{ + return get_device(rm->miscdev.this_device); +} +EXPORT_SYMBOL_GPL(gh_rm_get); + +void gh_rm_put(struct gh_rm *rm) +{ + put_device(rm->miscdev.this_device); +} +EXPORT_SYMBOL_GPL(gh_rm_put); + +static long gh_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct miscdevice *miscdev = filp->private_data; + struct gh_rm *rm = container_of(miscdev, struct gh_rm, miscdev); + + return gh_dev_vm_mgr_ioctl(rm, cmd, arg); +} + +static const struct file_operations gh_dev_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = gh_dev_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = noop_llseek, +}; + static int gh_msgq_platform_probe_direction(struct platform_device *pdev, bool tx, struct gh_resource *ghrsc) { @@ -665,7 +697,22 @@ static int gh_rm_drv_probe(struct platform_device *pdev) rm->msgq_client.rx_callback = gh_rm_msgq_rx_data; rm->msgq_client.tx_done = gh_rm_msgq_tx_done; - return gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); + ret = gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); + if (ret) + goto err_cache; + + rm->miscdev.name = "gunyah"; + rm->miscdev.minor = MISC_DYNAMIC_MINOR; + rm->miscdev.fops = &gh_dev_fops; + + ret = misc_register(&rm->miscdev); + if (ret) + goto err_msgq; + + return 0; +err_msgq: + mbox_free_channel(gh_msgq_chan(&rm->msgq)); + gh_msgq_remove(&rm->msgq); err_cache: kmem_cache_destroy(rm->cache); return ret; @@ -675,6 +722,7 @@ static int gh_rm_drv_remove(struct platform_device *pdev) { struct gh_rm *rm = platform_get_drvdata(pdev); + misc_deregister(&rm->miscdev); mbox_free_channel(gh_msgq_chan(&rm->msgq)); gh_msgq_remove(&rm->msgq); kmem_cache_destroy(rm->cache); diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c new file mode 100644 index 000000000000..a43401cb34f7 --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#define pr_fmt(fmt) "gh_vm_mgr: " fmt + +#include +#include +#include +#include +#include + +#include + +#include "vm_mgr.h" + +static __must_check struct gh_vm *gh_vm_alloc(struct gh_rm *rm) +{ + struct gh_vm *ghvm; + + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); + if (!ghvm) + return ERR_PTR(-ENOMEM); + + ghvm->parent = gh_rm_get(rm); + ghvm->rm = rm; + + return ghvm; +} + +static int gh_vm_release(struct inode *inode, struct file *filp) +{ + struct gh_vm *ghvm = filp->private_data; + + gh_rm_put(ghvm->rm); + kfree(ghvm); + return 0; +} + +static const struct file_operations gh_vm_fops = { + .owner = THIS_MODULE, + .release = gh_vm_release, + .llseek = noop_llseek, +}; + +static long gh_dev_ioctl_create_vm(struct gh_rm *rm, unsigned long arg) +{ + struct gh_vm *ghvm; + struct file *file; + int fd, err; + + /* arg reserved for future use. */ + if (arg) + return -EINVAL; + + ghvm = gh_vm_alloc(rm); + if (IS_ERR(ghvm)) + return PTR_ERR(ghvm); + + fd = get_unused_fd_flags(O_CLOEXEC); + if (fd < 0) { + err = fd; + goto err_destroy_vm; + } + + file = anon_inode_getfile("gunyah-vm", &gh_vm_fops, ghvm, O_RDWR); + if (IS_ERR(file)) { + err = PTR_ERR(file); + goto err_put_fd; + } + + fd_install(fd, file); + + return fd; + +err_put_fd: + put_unused_fd(fd); +err_destroy_vm: + gh_rm_put(ghvm->rm); + kfree(ghvm); + return err; +} + +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case GH_CREATE_VM: + return gh_dev_ioctl_create_vm(rm, arg); + default: + return -ENOTTY; + } +} diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h new file mode 100644 index 000000000000..1e94b58d7d34 --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _GH_VM_MGR_H +#define _GH_VM_MGR_H + +#include + +#include + +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg); + +struct gh_vm { + struct gh_rm *rm; + struct device *parent; +}; + +#endif diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h new file mode 100644 index 000000000000..86b9cb60118d --- /dev/null +++ b/include/uapi/linux/gunyah.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _UAPI_LINUX_GUNYAH_H +#define _UAPI_LINUX_GUNYAH_H + +/* + * Userspace interface for /dev/gunyah - gunyah based virtual machine + */ + +#include +#include + +#define GH_IOCTL_TYPE 'G' + +/* + * ioctls for /dev/gunyah fds: + */ +#define GH_CREATE_VM _IO(GH_IOCTL_TYPE, 0x0) /* Returns a Gunyah VM fd */ + +#endif