Re: [Xen-devel] [PATCH v3 3/4] x86/vvmx: correctly emulate VMWRITE

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.02.17 at 11:09, <sergey.dyasli@xxxxxxxxxx> wrote:
> --- a/xen/arch/x86/hvm/vmx/vvmx.c
> +++ b/xen/arch/x86/hvm/vmx/vvmx.c
> @@ -305,6 +305,19 @@ void set_vvmcs_real(const struct vcpu *v, u32 encoding, 
> u64 val)
>      virtual_vmcs_vmwrite(v, encoding, val);
>  }
>  
> +enum vmx_insn_errno set_vvmcs_virtual_safe(void *vvmcs, u32 encoding, u64 
> val)
> +{
> +    set_vvmcs_virtual(vvmcs, encoding, val);
> +
> +    return 0;

I think the growing number of literal zeros requires the introduction
of a "no error" enumerator value, probably even to be used by the
two earlier patches (which, if you did so, wouldn't invalidate my R-b).
Furthermore, didn't earlier discussion result in it being desirable to
at least add a comment here clarifying that the unconditional
returning of success isn't really the intended behavior (i.e. more
work is needed here)?

Jan


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