From patchwork Thu Feb 22 23:16:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 13568228 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CDE3C54798 for ; Thu, 22 Feb 2024 23:16:56 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3DB3A6B0087; Thu, 22 Feb 2024 18:16:43 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 312D76B0088; Thu, 22 Feb 2024 18:16:43 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 13EA16B0089; Thu, 22 Feb 2024 18:16:43 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id EA4486B0087 for ; Thu, 22 Feb 2024 18:16:42 -0500 (EST) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id BA252140A46 for ; Thu, 22 Feb 2024 23:16:42 +0000 (UTC) X-FDA: 81821001444.16.E70AB7D Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by imf25.hostedemail.com (Postfix) with ESMTP id B7D6AA000F for ; Thu, 22 Feb 2024 23:16:40 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=quicinc.com header.s=qcppdkim1 header.b=c4FHSPiO; dmarc=pass (policy=none) header.from=quicinc.com; spf=pass (imf25.hostedemail.com: domain of quic_eberman@quicinc.com designates 205.220.180.131 as permitted sender) smtp.mailfrom=quic_eberman@quicinc.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1708643800; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=AzSoWsq1GRLYsvZhrkELU+C2/mkvSPT+9OER08NcI0Q=; b=m71suxRHyhkgyb+t5F0pVGyU93hpTkz7+TqUUz94faaNpC79OyvTVJ7IOS7EW8e5XqmfpK L/F9w05Zl5eI/djYbjIBaoeT0Gpvs1QE7W3oDcF3Y2KzkgJqKQeq7r4X/BdDb9RxtJUE8X BhbBEjNOB07hQgr4fhRmiAI+nSaJP20= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=quicinc.com header.s=qcppdkim1 header.b=c4FHSPiO; dmarc=pass (policy=none) header.from=quicinc.com; spf=pass (imf25.hostedemail.com: domain of quic_eberman@quicinc.com designates 205.220.180.131 as permitted sender) smtp.mailfrom=quic_eberman@quicinc.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1708643800; a=rsa-sha256; cv=none; b=nv9PJLCxAJqS8P8TXzicMJomiw6UU7vUGONVkChCDVmq5j6jBc4O87XxILKpJK5B4r+Saz etoA1ZBGiGGdijKpFo0utmTVPMPTPjaW6JI2mow8q5W/cBTxz745atfrWdzkKTt3sM9Z/h Z06NhEfUsxJGQwt2s+2SxGC8LY97ZBg= Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 41MLuSH7019915; Thu, 22 Feb 2024 23:16:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; s=qcppdkim1; bh=AzSoWsq1GRLYsvZhrkELU+C2/mkvSPT+9OER08NcI0Q =; b=c4FHSPiOPiOFSQRkfIq3ElvxtYvbsbY9X5mAgPHqCmepP7sWjVMIPmjTuAO bHt463IAhgxIXsjyUP7d0eyRzO/zWVlFKcvBt5LmoPPCZw8gHEkesNU9JyITQXec 0ptjS0zbYkbbjHj/xuiAtbgpJLroXh6lKCraOKOHgsPBHnGml9FScIPrzGN/PMBB 3PCrxfpbBpILUpAt2+PE54fs02/WnA5ftQDOWvyLJqLWf6LoU0cJwDKd4BBl+8Ae 7xPM6MPq3/iXmXwfvKdN00v62Ftci/4C8JA0cZ0X4JLq+jfqjcFsaq0ox8LBs/Rj tRcHxwZBYtvUa8c0YlYyQDYCCuA== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3weedkr5ev-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 22 Feb 2024 23:16:32 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 41MNGV6k027681 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 22 Feb 2024 23:16:31 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 15.2.1118.40; Thu, 22 Feb 2024 15:16:31 -0800 From: Elliot Berman Date: Thu, 22 Feb 2024 15:16:31 -0800 Subject: [PATCH v17 08/35] gunyah: vm_mgr: Introduce basic VM Manager MIME-Version: 1.0 Message-ID: <20240222-gunyah-v17-8-1e9da6763d38@quicinc.com> References: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com> In-Reply-To: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com> To: Alex Elder , Srinivas Kandagatla , Murali Nalajal , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Philip Derrin , Prakruthi Deepak Heragu , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Konrad Dybcio , Bjorn Andersson , Dmitry Baryshkov , "Fuad Tabba" , Sean Christopherson , "Andrew Morton" CC: , , , , , , Elliot Berman X-Mailer: b4 0.12.4 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: KJ3uDWdFbCfNSF2X6ZwJ4I5DtSATNaar X-Proofpoint-GUID: KJ3uDWdFbCfNSF2X6ZwJ4I5DtSATNaar X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-22_15,2024-02-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 spamscore=0 adultscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402220178 X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: B7D6AA000F X-Stat-Signature: am6exjfmntojoufk1ieti65a7w9tzr9f X-HE-Tag: 1708643800-578620 X-HE-Meta: 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 Tzj+NAKc NQ0XaFYZSOq8qbS+XA4TwHDIH1ofaCoE83RB/ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Gunyah VM manager is a kernel moduel which exposes an interface to 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. Reviewed-by: Srinivas Kandagatla Reviewed-by: Alex Elder Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman Reviewed-by: Srivatsa Vaddagiri --- Documentation/userspace-api/ioctl/ioctl-number.rst | 1 + drivers/virt/gunyah/Makefile | 2 +- drivers/virt/gunyah/rsc_mgr.c | 50 +++++++++++- drivers/virt/gunyah/rsc_mgr.h | 2 + drivers/virt/gunyah/vm_mgr.c | 94 ++++++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 28 +++++++ include/uapi/linux/gunyah.h | 23 ++++++ 7 files changed, 198 insertions(+), 2 deletions(-) diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index 457e16f06e04d..149e3899ad785 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -136,6 +136,7 @@ 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 c2308389f5517..ceccbbe68b380 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -gunyah_rsc_mgr-y += rsc_mgr.o +gunyah_rsc_mgr-y += rsc_mgr.o vm_mgr.o obj-$(CONFIG_GUNYAH) += gunyah.o gunyah_rsc_mgr.o diff --git a/drivers/virt/gunyah/rsc_mgr.c b/drivers/virt/gunyah/rsc_mgr.c index 4ac946da0ca7f..fb0efe68f0e22 100644 --- a/drivers/virt/gunyah/rsc_mgr.c +++ b/drivers/virt/gunyah/rsc_mgr.c @@ -10,8 +10,10 @@ #include #include #include +#include #include "rsc_mgr.h" +#include "vm_mgr.h" /* clang-format off */ #define RM_RPC_API_VERSION_MASK GENMASK(3, 0) @@ -118,6 +120,7 @@ struct gunyah_rm_message { * @send_lock: synchronization to allow only one request to be sent at a time * @send_ready: completed when we know Tx message queue can take more messages * @nh: notifier chain for clients interested in RM notification messages + * @miscdev: /dev/gunyah */ struct gunyah_rm { struct device *dev; @@ -133,6 +136,8 @@ struct gunyah_rm { struct mutex send_lock; struct completion send_ready; struct blocking_notifier_head nh; + + struct miscdevice miscdev; }; /** @@ -613,6 +618,36 @@ int gunyah_rm_notifier_unregister(struct gunyah_rm *rm, } EXPORT_SYMBOL_GPL(gunyah_rm_notifier_unregister); +struct device *gunyah_rm_get(struct gunyah_rm *rm) +{ + return get_device(rm->miscdev.this_device); +} +EXPORT_SYMBOL_GPL(gunyah_rm_get); + +void gunyah_rm_put(struct gunyah_rm *rm) +{ + put_device(rm->miscdev.this_device); +} +EXPORT_SYMBOL_GPL(gunyah_rm_put); + +static long gunyah_dev_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + struct miscdevice *miscdev = filp->private_data; + struct gunyah_rm *rm = container_of(miscdev, struct gunyah_rm, miscdev); + + return gunyah_dev_vm_mgr_ioctl(rm, cmd, arg); +} + +static const struct file_operations gunyah_dev_fops = { + /* clang-format off */ + .owner = THIS_MODULE, + .unlocked_ioctl = gunyah_dev_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = noop_llseek, + /* clang-format on */ +}; + static int gunyah_platform_probe_capability(struct platform_device *pdev, int idx, struct gunyah_resource *ghrsc) @@ -699,7 +734,19 @@ static int gunyah_rm_probe(struct platform_device *pdev) if (ret) return ret; - return 0; + rm->miscdev.parent = &pdev->dev; + rm->miscdev.name = "gunyah"; + rm->miscdev.minor = MISC_DYNAMIC_MINOR; + rm->miscdev.fops = &gunyah_dev_fops; + + return misc_register(&rm->miscdev); +} + +static void gunyah_rm_remove(struct platform_device *pdev) +{ + struct gunyah_rm *rm = platform_get_drvdata(pdev); + + misc_deregister(&rm->miscdev); } static const struct of_device_id gunyah_rm_of_match[] = { @@ -710,6 +757,7 @@ MODULE_DEVICE_TABLE(of, gunyah_rm_of_match); static struct platform_driver gunyah_rm_driver = { .probe = gunyah_rm_probe, + .remove_new = gunyah_rm_remove, .driver = { .name = "gunyah_rsc_mgr", .of_match_table = gunyah_rm_of_match, diff --git a/drivers/virt/gunyah/rsc_mgr.h b/drivers/virt/gunyah/rsc_mgr.h index 48b69dbf2190b..21318ef25040c 100644 --- a/drivers/virt/gunyah/rsc_mgr.h +++ b/drivers/virt/gunyah/rsc_mgr.h @@ -17,6 +17,8 @@ int gunyah_rm_notifier_register(struct gunyah_rm *rm, struct notifier_block *nb); int gunyah_rm_notifier_unregister(struct gunyah_rm *rm, struct notifier_block *nb); +struct device *gunyah_rm_get(struct gunyah_rm *rm); +void gunyah_rm_put(struct gunyah_rm *rm); int gunyah_rm_call(struct gunyah_rm *rsc_mgr, u32 message_id, diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c new file mode 100644 index 0000000000000..e9dff733e35ef --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#define pr_fmt(fmt) "gunyah_vm_mgr: " fmt + +#include +#include +#include +#include + +#include + +#include "rsc_mgr.h" +#include "vm_mgr.h" + +static __must_check struct gunyah_vm *gunyah_vm_alloc(struct gunyah_rm *rm) +{ + struct gunyah_vm *ghvm; + + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); + if (!ghvm) + return ERR_PTR(-ENOMEM); + + ghvm->parent = gunyah_rm_get(rm); + ghvm->rm = rm; + + return ghvm; +} + +static int gunyah_vm_release(struct inode *inode, struct file *filp) +{ + struct gunyah_vm *ghvm = filp->private_data; + + gunyah_rm_put(ghvm->rm); + kfree(ghvm); + return 0; +} + +static const struct file_operations gunyah_vm_fops = { + .owner = THIS_MODULE, + .release = gunyah_vm_release, + .llseek = noop_llseek, +}; + +static long gunyah_dev_ioctl_create_vm(struct gunyah_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(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", &gunyah_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: + gunyah_rm_put(ghvm->rm); + kfree(ghvm); + return err; +} + +long gunyah_dev_vm_mgr_ioctl(struct gunyah_rm *rm, unsigned int cmd, + unsigned long arg) +{ + switch (cmd) { + case GUNYAH_CREATE_VM: + return gunyah_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 0000000000000..50790d4026765 --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _GUNYAH_VM_MGR_PRIV_H +#define _GUNYAH_VM_MGR_PRIV_H + +#include + +#include + +#include "rsc_mgr.h" + +long gunyah_dev_vm_mgr_ioctl(struct gunyah_rm *rm, unsigned int cmd, + unsigned long arg); + +/** + * struct gunyah_vm - Main representation of a Gunyah Virtual machine + * @rm: Pointer to the resource manager struct to make RM calls + * @parent: For logging + */ +struct gunyah_vm { + struct gunyah_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 0000000000000..ac338ec4b85dd --- /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 GUNYAH_IOCTL_TYPE 'G' + +/* + * ioctls for /dev/gunyah fds: + */ +#define GUNYAH_CREATE_VM _IO(GUNYAH_IOCTL_TYPE, 0x0) /* Returns a Gunyah VM fd */ + +#endif