Re: [Qemu-devel] Does kvm_fd mean KVM or VCPU fd?

[Paolo Bonzini]

Il 14/06/2012 10:24, 陳韋任 (Wei-Ren Chen) ha scritto:
> Hi all,
> 
>   While reading KVM releated code in QEMU, I found the name of one
> field in CPU_COMMON (cpu-defs.h), i.e. kvm_fd, might be misleading.
> See the code below,
> 
> ---
> int kvm_init_vcpu(CPUArchState *env)
> {
>     ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index);
>     env->kvm_fd = ret; /* VCPU fd? */
> }
> ---
> 
>   I think KVM_CREATE_VCPU should return VCPU fd, right? AFAIK, in KVM
> world, kvm_fd usually means the fd we get after opening "/dev/kvm".
> Just want to make sure I understand the code correcly. Thanks.

This is the kvm_fd inside struct CPUState, so it's per-CPU.

Paolo