>>> Haozhong Zhang 07/12/17 4:05 AM >>>
>+static int vcpu_set_vmce(struct vcpu *v,
>+ const struct xen_domctl_ext_vcpucontext *evc)
>+{
>+/*
>+ * Sizes of vMCE parameters used by the current and past versions
>+ * of Xen in descending order. If vMCE parameters a
vMCE parameters in struct xen_domctl_ext_vcpucontext were extended in
the past, and is likely to be extended in the future. When migrating a
PV domain from old Xen, XEN_DOMCTL_set_ext_vcpucontext should handle
the differences.
Instead of adding ad-hoc handling code at each extension, we introduce
