Re: [PATCH 3/8] kvm: handle KVM_CREATE_VM ioctl command

[Dmitry V. Levin]

On Fri, Dec 01, 2017 at 02:45:53PM +0900, Masatake YAMATO wrote:
> * kvm.c (kvm_ioctl): Handle KVM_CREATE_VM.
> (kvm_ioctl_create_vm): New function.
> 
> Signed-off-by: Masatake YAMATO <yam...@redhat.com>
> ---
>  kvm.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/kvm.c b/kvm.c
> index 9fa7e248..fdcf3466 100644
> --- a/kvm.c
> +++ b/kvm.c
> @@ -33,10 +33,23 @@
>  #ifdef HAVE_LINUX_KVM_H
>  #include <linux/kvm.h>
>  
> +static int
> +kvm_ioctl_create_vm(struct tcb *const tcp, const kernel_ulong_t arg)
> +{
> +#ifdef X86_64
> +     return RVAL_IOCTL_DECODED | RVAL_FD;
> +#else
> +     return RVAL_DECODED | RVAL_FD;
> +#endif

As the kernel check whether arg is zero or not is performed on all
architectures, you can safely handle KVM_CREATE_VM handler the same way
as you handle KVM_RUN.


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