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