diff options
Diffstat (limited to 'drivers/virt/acrn/hsm.c')
| -rw-r--r-- | drivers/virt/acrn/hsm.c | 76 |
1 files changed, 74 insertions, 2 deletions
diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c index a8dcb250649d..5fd933471683 100644 --- a/drivers/virt/acrn/hsm.c +++ b/drivers/virt/acrn/hsm.c @@ -9,7 +9,6 @@ * Yakui Zhao <yakui.zhao@intel.com> */ -#include <linux/miscdevice.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/slab.h> @@ -38,10 +37,82 @@ static int acrn_dev_open(struct inode *inode, struct file *filp) return 0; } +/* + * HSM relies on hypercall layer of the ACRN hypervisor to do the + * sanity check against the input parameters. + */ +static long acrn_dev_ioctl(struct file *filp, unsigned int cmd, + unsigned long ioctl_param) +{ + struct acrn_vm *vm = filp->private_data; + struct acrn_vm_creation *vm_param; + int ret = 0; + + if (vm->vmid == ACRN_INVALID_VMID && cmd != ACRN_IOCTL_CREATE_VM) { + dev_dbg(acrn_dev.this_device, + "ioctl 0x%x: Invalid VM state!\n", cmd); + return -EINVAL; + } + + switch (cmd) { + case ACRN_IOCTL_CREATE_VM: + vm_param = memdup_user((void __user *)ioctl_param, + sizeof(struct acrn_vm_creation)); + if (IS_ERR(vm_param)) + return PTR_ERR(vm_param); + + if ((vm_param->reserved0 | vm_param->reserved1) != 0) + return -EINVAL; + + vm = acrn_vm_create(vm, vm_param); + if (!vm) { + ret = -EINVAL; + kfree(vm_param); + break; + } + + if (copy_to_user((void __user *)ioctl_param, vm_param, + sizeof(struct acrn_vm_creation))) { + acrn_vm_destroy(vm); + ret = -EFAULT; + } + + kfree(vm_param); + break; + case ACRN_IOCTL_START_VM: + ret = hcall_start_vm(vm->vmid); + if (ret < 0) + dev_dbg(acrn_dev.this_device, + "Failed to start VM %u!\n", vm->vmid); + break; + case ACRN_IOCTL_PAUSE_VM: + ret = hcall_pause_vm(vm->vmid); + if (ret < 0) + dev_dbg(acrn_dev.this_device, + "Failed to pause VM %u!\n", vm->vmid); + break; + case ACRN_IOCTL_RESET_VM: + ret = hcall_reset_vm(vm->vmid); + if (ret < 0) + dev_dbg(acrn_dev.this_device, + "Failed to restart VM %u!\n", vm->vmid); + break; + case ACRN_IOCTL_DESTROY_VM: + ret = acrn_vm_destroy(vm); + break; + default: + dev_dbg(acrn_dev.this_device, "Unknown IOCTL 0x%x!\n", cmd); + ret = -ENOTTY; + } + + return ret; +} + static int acrn_dev_release(struct inode *inode, struct file *filp) { struct acrn_vm *vm = filp->private_data; + acrn_vm_destroy(vm); kfree(vm); return 0; } @@ -50,9 +121,10 @@ static const struct file_operations acrn_fops = { .owner = THIS_MODULE, .open = acrn_dev_open, .release = acrn_dev_release, + .unlocked_ioctl = acrn_dev_ioctl, }; -static struct miscdevice acrn_dev = { +struct miscdevice acrn_dev = { .minor = MISC_DYNAMIC_MINOR, .name = "acrn_hsm", .fops = &acrn_fops, |