From patchwork Fri Jan 20 22:46:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 644680 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 2CD4AC52D11 for ; Fri, 20 Jan 2023 22:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230078AbjATWsp (ORCPT ); Fri, 20 Jan 2023 17:48:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56572 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229929AbjATWsb (ORCPT ); Fri, 20 Jan 2023 17:48:31 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6752863E12; Fri, 20 Jan 2023 14:48:08 -0800 (PST) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30KMc40h023107; Fri, 20 Jan 2023 22:47:47 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=tS0TNGM1FTZCkg//mzom5T+cH/vZ8HjSj+xPMrvN+is=; b=iog6J3vh5PzNKDfF1ZjzB+G2ZBYEhfRnaU0Y1CIKztUgu2EfoD3uWVbLtje5dbDBeuf6 N6MKKV0d4FghmVSSZb04bbUrJBBU9E4sRsB4op6kLyIJw6v8Xp+kNRqLbiuK2G16q6dx NATTGTYdD+gWE+V1rCOLTZewi6kLdakjr7pqOYSPmUqqmk0gjnwk07CH7i4YSAxDE6Dc CMRyn5hjA2p9LCLbjS/jf4Iu+qaQ4y3YQrRwlqgysOERaU0dzzWP1ykihi/S+gRm0dyW ahAi6OkbQZqfJ8D+30NPhJvMJiinp7Gxvjs1a0/IiYtTYXS4lkngIFWAc5M1drsfAhcj vg== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3n7q859eb3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Jan 2023 22:47:47 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 30KMlkkx022279 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Jan 2023 22:47:46 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 15.2.986.36; Fri, 20 Jan 2023 14:47:45 -0800 From: Elliot Berman To: Bjorn Andersson , Alex Elder , Jonathan Corbet , Elliot Berman , Murali Nalajala CC: Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Prakruthi Deepak Heragu , Dmitry Baryshkov , Arnd Bergmann , "Greg Kroah-Hartman" , Rob Herring , Krzysztof Kozlowski , Bagas Sanjaya , Catalin Marinas , "Will Deacon" , Marc Zyngier , Jassi Brar , Sudeep Holla , , , , , Subject: [PATCH v9 11/27] gunyah: vm_mgr: Introduce basic VM Manager Date: Fri, 20 Jan 2023 14:46:10 -0800 Message-ID: <20230120224627.4053418-12-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230120224627.4053418-1-quic_eberman@quicinc.com> References: <20230120224627.4053418-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) 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-ORIG-GUID: ORopLD2ENlIml2XjaaGh75_sJQfNjIYO X-Proofpoint-GUID: ORopLD2ENlIml2XjaaGh75_sJQfNjIYO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-20_11,2023-01-20_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 spamscore=0 malwarescore=0 priorityscore=1501 clxscore=1015 adultscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301200218 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 | 51 +++++++- drivers/virt/gunyah/vm_mgr.c | 117 ++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 20 +++ include/linux/gunyah_rsc_mgr.h | 3 + include/uapi/linux/gunyah.h | 23 ++++ 7 files changed, 215 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 eb045fc495a4..8696dc3cdd83 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 de29769f2f3f..03951cf82023 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -2,5 +2,5 @@ obj-$(CONFIG_GUNYAH) += gunyah.o -gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o vm_mgr.o obj-$(CONFIG_GUNYAH) += gunyah_rsc_mgr.o diff --git a/drivers/virt/gunyah/rsc_mgr.c b/drivers/virt/gunyah/rsc_mgr.c index 382f9943fd31..95f4aa928aaf 100644 --- a/drivers/virt/gunyah/rsc_mgr.c +++ b/drivers/virt/gunyah/rsc_mgr.c @@ -16,8 +16,10 @@ #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) @@ -105,6 +107,7 @@ struct gh_rm { struct kmem_cache *cache; struct mutex send_lock; + struct miscdevice miscdev; struct work_struct recv_work; }; @@ -526,6 +529,33 @@ int gh_rm_call(struct gh_rm *rm, u32 message_id, void *req_buff, size_t req_buff return ret; } +void get_gh_rm(struct gh_rm *rm) +{ + get_device(rm->dev); +} +EXPORT_SYMBOL_GPL(get_gh_rm); + +void put_gh_rm(struct gh_rm *rm) +{ + put_device(rm->dev); +} +EXPORT_SYMBOL_GPL(put_gh_rm); + +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, int idx, struct gunyah_resource *ghrsc) { @@ -582,13 +612,32 @@ 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; } 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..0864dbd77e28 --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.c @@ -0,0 +1,117 @@ +// 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 gunyah_vm *gunyah_vm_alloc(struct gh_rm_rpc *rm) +{ + struct gunyah_vm *ghvm; + int vmid; + + vmid = gh_rm_alloc_vmid(rm, 0); + if (vmid < 0) + return ERR_PTR(vmid); + + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); + if (!ghvm) { + gh_rm_dealloc_vmid(rm, vmid); + return ghvm; + } + + get_gh_rm(rm); + + ghvm->vmid = vmid; + ghvm->rm = rm; + + return ghvm; +} + +static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + long r; + + switch (cmd) { + default: + r = -ENOTTY; + break; + } + + return r; +} + +static int gh_vm_release(struct inode *inode, struct file *filp) +{ + struct gunyah_vm *ghvm = filp->private_data; + + put_gh_rm(ghvm->rm); + kfree(ghvm); + return 0; +} + +static const struct file_operations gh_vm_fops = { + .unlocked_ioctl = gh_vm_ioctl, + .release = gh_vm_release, + .compat_ioctl = compat_ptr_ioctl, + .llseek = noop_llseek, +}; + +static long gh_dev_ioctl_create_vm(struct gh_rm *rm, unsigned long arg) +{ + struct gunyah_vm *ghvm; + struct file *file; + int fd, err; + + /* arg reserved for future use. */ + if (arg) + return -EINVAL; + + ghvm = gunyah_vm_alloc(rm); + if (IS_ERR_OR_NULL(ghvm)) + return PTR_ERR(ghvm) ? : -ENOMEM; + + 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: + 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 -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL_GPL(gh_dev_vm_mgr_ioctl); + diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h new file mode 100644 index 000000000000..e47f34de7f9e --- /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_PRIV_VM_MGR_H +#define _GH_PRIV_VM_MGR_H + +#include + +#include + +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg); + +struct gunyah_vm { + u16 vmid; + struct gh_rm_rpc *rm; +}; + +#endif diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index be0bce5507b1..9a9a037b349a 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -17,6 +17,9 @@ struct gh_rm; +void get_gh_rm(struct gh_rm *rm); +void put_gh_rm(struct gh_rm *rm); + enum gh_rm_vm_status { GH_RM_VM_STATUS_NO_STATE = 0, GH_RM_VM_STATUS_INIT = 1, diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h new file mode 100644 index 000000000000..88a40d6e0b96 --- /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 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _UAPI_LINUX_GUNYAH +#define _UAPI_LINUX_GUNYAH + +/* + * 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