127 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * ACRN_HSM: Virtual Machine management4 *5 * Copyright (C) 2020 Intel Corporation. All rights reserved.6 *7 * Authors:8 * Jason Chen CJ <jason.cj.chen@intel.com>9 * Yakui Zhao <yakui.zhao@intel.com>10 */11#include <linux/io.h>12#include <linux/mm.h>13#include <linux/slab.h>14 15#include "acrn_drv.h"16 17/* List of VMs */18LIST_HEAD(acrn_vm_list);19/*20 * acrn_vm_list is read in a worker thread which dispatch I/O requests and21 * is wrote in VM creation ioctl. Use the rwlock mechanism to protect it.22 */23DEFINE_RWLOCK(acrn_vm_list_lock);24 25struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,26 struct acrn_vm_creation *vm_param)27{28 int ret;29 30 ret = hcall_create_vm(virt_to_phys(vm_param));31 if (ret < 0 || vm_param->vmid == ACRN_INVALID_VMID) {32 dev_err(acrn_dev.this_device,33 "Failed to create VM! Error: %d\n", ret);34 return NULL;35 }36 37 mutex_init(&vm->regions_mapping_lock);38 INIT_LIST_HEAD(&vm->ioreq_clients);39 spin_lock_init(&vm->ioreq_clients_lock);40 vm->vmid = vm_param->vmid;41 vm->vcpu_num = vm_param->vcpu_num;42 43 if (acrn_ioreq_init(vm, vm_param->ioreq_buf) < 0) {44 hcall_destroy_vm(vm_param->vmid);45 vm->vmid = ACRN_INVALID_VMID;46 return NULL;47 }48 49 write_lock_bh(&acrn_vm_list_lock);50 list_add(&vm->list, &acrn_vm_list);51 write_unlock_bh(&acrn_vm_list_lock);52 53 acrn_ioeventfd_init(vm);54 acrn_irqfd_init(vm);55 dev_dbg(acrn_dev.this_device, "VM %u created.\n", vm->vmid);56 return vm;57}58 59int acrn_vm_destroy(struct acrn_vm *vm)60{61 int ret;62 63 if (vm->vmid == ACRN_INVALID_VMID ||64 test_and_set_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags))65 return 0;66 67 ret = hcall_destroy_vm(vm->vmid);68 if (ret < 0) {69 dev_err(acrn_dev.this_device,70 "Failed to destroy VM %u\n", vm->vmid);71 clear_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags);72 return ret;73 }74 75 /* Remove from global VM list */76 write_lock_bh(&acrn_vm_list_lock);77 list_del_init(&vm->list);78 write_unlock_bh(&acrn_vm_list_lock);79 80 acrn_ioeventfd_deinit(vm);81 acrn_irqfd_deinit(vm);82 acrn_ioreq_deinit(vm);83 84 if (vm->monitor_page) {85 put_page(vm->monitor_page);86 vm->monitor_page = NULL;87 }88 89 acrn_vm_all_ram_unmap(vm);90 91 dev_dbg(acrn_dev.this_device, "VM %u destroyed.\n", vm->vmid);92 vm->vmid = ACRN_INVALID_VMID;93 return 0;94}95 96/**97 * acrn_msi_inject() - Inject a MSI interrupt into a User VM98 * @vm: User VM99 * @msi_addr: The MSI address100 * @msi_data: The MSI data101 *102 * Return: 0 on success, <0 on error103 */104int acrn_msi_inject(struct acrn_vm *vm, u64 msi_addr, u64 msi_data)105{106 struct acrn_msi_entry *msi;107 int ret;108 109 /* might be used in interrupt context, so use GFP_ATOMIC */110 msi = kzalloc(sizeof(*msi), GFP_ATOMIC);111 if (!msi)112 return -ENOMEM;113 114 /*115 * msi_addr: addr[19:12] with dest vcpu id116 * msi_data: data[7:0] with vector117 */118 msi->msi_addr = msi_addr;119 msi->msi_data = msi_data;120 ret = hcall_inject_msi(vm->vmid, virt_to_phys(msi));121 if (ret < 0)122 dev_err(acrn_dev.this_device,123 "Failed to inject MSI to VM %u!\n", vm->vmid);124 kfree(msi);125 return ret;126}127