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126 lines
2.9 KiB
126 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* ACRN_HSM: Virtual Machine management |
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* |
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* Copyright (C) 2020 Intel Corporation. All rights reserved. |
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* |
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* Authors: |
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* Jason Chen CJ <[email protected]> |
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* Yakui Zhao <[email protected]> |
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*/ |
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#include <linux/io.h> |
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#include <linux/mm.h> |
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#include <linux/slab.h> |
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#include "acrn_drv.h" |
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/* List of VMs */ |
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LIST_HEAD(acrn_vm_list); |
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/* |
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* acrn_vm_list is read in a worker thread which dispatch I/O requests and |
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* is wrote in VM creation ioctl. Use the rwlock mechanism to protect it. |
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*/ |
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DEFINE_RWLOCK(acrn_vm_list_lock); |
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struct acrn_vm *acrn_vm_create(struct acrn_vm *vm, |
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struct acrn_vm_creation *vm_param) |
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{ |
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int ret; |
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ret = hcall_create_vm(virt_to_phys(vm_param)); |
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if (ret < 0 || vm_param->vmid == ACRN_INVALID_VMID) { |
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dev_err(acrn_dev.this_device, |
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"Failed to create VM! Error: %d\n", ret); |
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return NULL; |
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} |
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mutex_init(&vm->regions_mapping_lock); |
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INIT_LIST_HEAD(&vm->ioreq_clients); |
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spin_lock_init(&vm->ioreq_clients_lock); |
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vm->vmid = vm_param->vmid; |
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vm->vcpu_num = vm_param->vcpu_num; |
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if (acrn_ioreq_init(vm, vm_param->ioreq_buf) < 0) { |
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hcall_destroy_vm(vm_param->vmid); |
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vm->vmid = ACRN_INVALID_VMID; |
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return NULL; |
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} |
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write_lock_bh(&acrn_vm_list_lock); |
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list_add(&vm->list, &acrn_vm_list); |
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write_unlock_bh(&acrn_vm_list_lock); |
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acrn_ioeventfd_init(vm); |
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acrn_irqfd_init(vm); |
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dev_dbg(acrn_dev.this_device, "VM %u created.\n", vm->vmid); |
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return vm; |
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} |
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int acrn_vm_destroy(struct acrn_vm *vm) |
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{ |
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int ret; |
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if (vm->vmid == ACRN_INVALID_VMID || |
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test_and_set_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags)) |
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return 0; |
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/* Remove from global VM list */ |
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write_lock_bh(&acrn_vm_list_lock); |
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list_del_init(&vm->list); |
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write_unlock_bh(&acrn_vm_list_lock); |
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acrn_ioeventfd_deinit(vm); |
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acrn_irqfd_deinit(vm); |
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acrn_ioreq_deinit(vm); |
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if (vm->monitor_page) { |
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put_page(vm->monitor_page); |
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vm->monitor_page = NULL; |
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} |
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ret = hcall_destroy_vm(vm->vmid); |
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if (ret < 0) { |
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dev_err(acrn_dev.this_device, |
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"Failed to destroy VM %u\n", vm->vmid); |
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clear_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags); |
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return ret; |
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} |
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acrn_vm_all_ram_unmap(vm); |
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dev_dbg(acrn_dev.this_device, "VM %u destroyed.\n", vm->vmid); |
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vm->vmid = ACRN_INVALID_VMID; |
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return 0; |
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} |
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/** |
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* acrn_inject_msi() - Inject a MSI interrupt into a User VM |
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* @vm: User VM |
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* @msi_addr: The MSI address |
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* @msi_data: The MSI data |
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* |
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* Return: 0 on success, <0 on error |
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*/ |
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int acrn_msi_inject(struct acrn_vm *vm, u64 msi_addr, u64 msi_data) |
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{ |
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struct acrn_msi_entry *msi; |
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int ret; |
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/* might be used in interrupt context, so use GFP_ATOMIC */ |
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msi = kzalloc(sizeof(*msi), GFP_ATOMIC); |
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if (!msi) |
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return -ENOMEM; |
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/* |
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* msi_addr: addr[19:12] with dest vcpu id |
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* msi_data: data[7:0] with vector |
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*/ |
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msi->msi_addr = msi_addr; |
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msi->msi_data = msi_data; |
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ret = hcall_inject_msi(vm->vmid, virt_to_phys(msi)); |
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if (ret < 0) |
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dev_err(acrn_dev.this_device, |
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"Failed to inject MSI to VM %u!\n", vm->vmid); |
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kfree(msi); |
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return ret; |
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}
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