forked from Minki/linux
4c4c1257b8
The ACRN hypervisor has scenarios which could run a real-time guest VM.
The real-time guest VM occupies dedicated CPU cores, be assigned with
dedicated PCI devices. It can run without the Service VM after boot up.
hcall_destroy_vm() returns failure when a real-time guest VM refuses.
The clearing of flag ACRN_VM_FLAG_DESTROYED causes some kernel resource
double-freed in a later acrn_vm_destroy().
Do hcall_destroy_vm() before resource release to drop this chance to
destroy the VM if hypercall fails.
Fixes: 9c5137aedd ("virt: acrn: Introduce VM management interfaces")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Signed-off-by: Fei Li <fei1.li@intel.com>
Link: https://lore.kernel.org/r/20210722062736.15050-1-fei1.li@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
// 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);
|
|
acrn_irqfd_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;
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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_irqfd_deinit(vm);
|
|
acrn_ioreq_deinit(vm);
|
|
|
|
if (vm->monitor_page) {
|
|
put_page(vm->monitor_page);
|
|
vm->monitor_page = NULL;
|
|
}
|
|
|
|
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_msi_inject() - 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;
|
|
}
|