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Tue, 9 Jan 2024 19:37:54 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; Tue, 9 Jan 2024 11:37:53 -0800 From: Elliot Berman Date: Tue, 9 Jan 2024 11:37:46 -0800 Subject: [PATCH v16 08/34] gunyah: vm_mgr: Introduce basic VM Manager MIME-Version: 1.0 Message-ID: <20240109-gunyah-v16-8-634904bf4ce9@quicinc.com> References: <20240109-gunyah-v16-0-634904bf4ce9@quicinc.com> In-Reply-To: <20240109-gunyah-v16-0-634904bf4ce9@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 0.13-dev 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: lzNTDnqHMufbCm4ApLHJgRhpzW9et7Xt X-Proofpoint-GUID: lzNTDnqHMufbCm4ApLHJgRhpzW9et7Xt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 suspectscore=0 impostorscore=0 clxscore=1015 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401090158 X-Rspamd-Queue-Id: 9329C1C0002 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: wuremrcznaw5bpu9xzd1sg8ymy5dw4tg X-HE-Tag: 1704829085-332854 X-HE-Meta: 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 z+KY1rgX 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 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 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. 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 --- Documentation/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 | 94 ++++++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 28 +++++++ include/uapi/linux/gunyah.h | 23 ++++++ 6 files changed, 198 insertions(+), 1 deletion(-) diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index d8b6cb1a3636..91e01925a41b 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 c2308389f551..ceccbbe68b38 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 a3578a0c10b4..45f9514cfe0e 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; }; /** @@ -617,6 +622,36 @@ 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) @@ -702,9 +737,24 @@ static int gunyah_rm_probe(struct platform_device *pdev) if (ret) return ret; + rm->miscdev.name = "gunyah"; + rm->miscdev.minor = MISC_DYNAMIC_MINOR; + rm->miscdev.fops = &gunyah_dev_fops; + + ret = misc_register(&rm->miscdev); + if (ret) + return ret; + return 0; } +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[] = { { .compatible = "gunyah-resource-manager" }, {} @@ -713,6 +763,7 @@ 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/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c new file mode 100644 index 000000000000..e9dff733e35e --- /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 000000000000..50790d402676 --- /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 000000000000..ac338ec4b85d --- /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