>>> On 17.03.17 at 07:46, <haozhong.zh...@intel.com> wrote:
> --- a/xen/include/public/arch-x86/hvm/save.h
> +++ b/xen/include/public/arch-x86/hvm/save.h
> @@ -599,6 +599,8 @@ struct hvm_vmce_vcpu {
>      uint64_t caps;
>      uint64_t mci_ctl2_bank0;
>      uint64_t mci_ctl2_bank1;
> +    uint8_t  lmce_enabled;
> +    uint8_t  pad[7];

Even if only one bit is used there right now, I think you should migrate
the full MSR.

> --- a/xen/include/public/domctl.h
> +++ b/xen/include/public/domctl.h
> @@ -37,7 +37,7 @@
>  #include "hvm/save.h"
>  #include "memory.h"
>  
> -#define XEN_DOMCTL_INTERFACE_VERSION 0x0000000c
> +#define XEN_DOMCTL_INTERFACE_VERSION 0x0000000d

This seemingly unrelated change needs to be explained in the
description.

Jan


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