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linux kernel000000000000

x86与KVM

在用户态通过ioctl设置KVM_CREATE_VCPU时，内核会创建一个虚拟CPU环境： kvm_vm_ioctl_create_vcpu() --> kvm_arch_vcpu_create() --> vmx_create_vcpu --> kvm_arch_vcpu_setup(vcpu); 函数首先通过kvm_arch_vcpu_create()创建基本信息，之后调用kvm_

KVM设备节点文件操作： static struct file_operations kvm_chardev_ops = { .unlocked_ioctl = kvm_dev_ioctl, .compat_ioctl   = kvm_dev_ioctl, .llseek = noop_llseek, }; static struct miscdevice kvm_dev

VM虚拟机提供的文件操作，主要以ioctl方式提供： static struct file_operations kvm_vm_fops = { .release        = kvm_vm_release, .unlocked_ioctl = kvm_vm_ioctl, #ifdef CONFIG_KVM_COMPAT .compat_ioctl   = kvm_vm_compat

用户空间发送KVM_RUN指令，通过vm的fd描述符进行。 static long kvm_vcpu_ioctl(struct file *filp,  unsigned int ioctl, unsigned long arg) { struct kvm_vcpu *vcpu = filp->private_data; void __user *argp = (void __user

static int kvm_init_debug(void) { int r = -EEXIST; struct kvm_stats_debugfs_item *p;kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); if (kvm_debugfs_dir == NULL) goto out;kvm_debugfs_n

static long kvm_vm_ioctl(struct file *filp,   unsigned int ioctl, unsigned long arg) { struct kvm *kvm = filp->private_data; void __user *argp = (void __user *)arg; int r; if (kvm->mm != curr

kvm_vm_ioctl_create_vcpu vcpu = kvm_arch_vcpu_create(kvm, id); r = kvm_arch_vcpu_setup(vcpu); r = kvm_create_vcpu_debugfs(vcpu); r = create_vcpu_fd(vcpu); kvm->vcpus[atomic_read(&kvm->onlin

linux 内核 kvm中的vcpu描述

static struct file_operations kvm_vm_fops = { .release        = kvm_vm_release, .unlocked_ioctl = kvm_vm_ioctl, #ifdef CONFIG_KVM_COMPAT .compat_ioctl   = kvm_vm_compat_ioctl, #endif .llseek =

kvm 的linux内核描述： struct kvm { spinlock_t mmu_lock; struct mutex slots_lock; struct mm_struct *mm; /* userspace tied to this vm */ struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM]; struct sr