Re: [Xen-devel] [PATCH v5 06/11] x86/vmce: emulate MSR_IA32_MCG_EXT_CTL

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.07.17 at 05:46, <haozhong.zhang@xxxxxxxxx> wrote:
> --- a/xen/include/public/arch-x86/hvm/save.h
> +++ b/xen/include/public/arch-x86/hvm/save.h
> @@ -610,6 +610,7 @@ struct hvm_vmce_vcpu {
>      uint64_t caps;
>      uint64_t mci_ctl2_bank0;
>      uint64_t mci_ctl2_bank1;
> +    uint64_t mcg_ext_ctl;
>  };
>  
>  DECLARE_HVM_SAVE_TYPE(VMCE_VCPU, 18, struct hvm_vmce_vcpu);

I'm afraid I have to withdraw my R-b for this one: The structure
here is being used for XEN_DOMCTL_{get,set}_ext_vcpucontext
as well, and for PV guest migration from 4.9 to 4.10 I think you
need to handle the possibly missing field in x86/domctl.c.

Jan


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