// SPDX-License-Identifier: GPL-2.0-only /* * VMware VMCI Driver * * Copyright (C) 2012 VMware, Inc. All rights reserved. */ #include <linux/vmw_vmci_defs.h> #include <linux/vmw_vmci_api.h> #include <linux/atomic.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include "vmci_driver.h" #include "vmci_event.h" static bool vmci_disable_host; module_param_named(disable_host, vmci_disable_host, bool, 0); MODULE_PARM_DESC(disable_host, "Disable driver host personality (default=enabled)"); static bool vmci_disable_guest; module_param_named(disable_guest, vmci_disable_guest, bool, 0); MODULE_PARM_DESC(disable_guest, "Disable driver guest personality (default=enabled)"); static bool vmci_guest_personality_initialized; static bool vmci_host_personality_initialized; /* * vmci_get_context_id() - Gets the current context ID. * * Returns the current context ID. Note that since this is accessed only * from code running in the host, this always returns the host context ID. */ u32 vmci_get_context_id(void) { if (vmci_guest_code_active()) return vmci_get_vm_context_id(); else if (vmci_host_code_active()) return VMCI_HOST_CONTEXT_ID; return VMCI_INVALID_ID; } EXPORT_SYMBOL_GPL(vmci_get_context_id); static int __init vmci_drv_init(void) { int vmci_err; int error; vmci_err = vmci_event_init(); if (vmci_err < VMCI_SUCCESS) { pr_err("Failed to initialize VMCIEvent (result=%d)\n", vmci_err); return -EINVAL; } if (!vmci_disable_guest) { error = vmci_guest_init(); if (error) { pr_warn("Failed to initialize guest personality (err=%d)\n", error); } else { vmci_guest_personality_initialized = true; pr_info("Guest personality initialized and is %s\n", vmci_guest_code_active() ? "active" : "inactive"); } } if (!vmci_disable_host) { error = vmci_host_init(); if (error) { pr_warn("Unable to initialize host personality (err=%d)\n", error); } else { vmci_host_personality_initialized = true; pr_info("Initialized host personality\n"); } } if (!vmci_guest_personality_initialized && !vmci_host_personality_initialized) { vmci_event_exit(); return -ENODEV; } return 0; } module_init(vmci_drv_init); static void __exit vmci_drv_exit(void) { if (vmci_guest_personality_initialized) vmci_guest_exit(); if (vmci_host_personality_initialized) vmci_host_exit(); vmci_event_exit(); } module_exit(vmci_drv_exit); MODULE_AUTHOR("VMware, Inc."); MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface."); MODULE_VERSION("1.1.6.0-k"); MODULE_LICENSE("GPL v2");