On 16/06/2016 08:06, Haozhong Zhang wrote:
> Migration is only allowed between VCPUs with the same lmce option.
>
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> ---
> target-i386/machine.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/target-i386/machine.c b/target-i386/machine.c
> index cb9adf2..00375a3 100644
> --- a/target-i386/machine.c
> +++ b/target-i386/machine.c
> @@ -347,6 +347,12 @@ static int cpu_post_load(void *opaque, int version_id)
> return -EINVAL;
> }
>
> + if (!cpu->enable_lmce && (env->mcg_cap & MCG_LMCE_P)) {
> + error_report("Config mismatch: VCPU has LMCE enabled, "
> + "but \"lmce\" option is disabled");
> + return -EINVAL;
> + }
> +
I think this is unnecessary. Apart from this, the patch is good and can
be squashed in patch 1 for v5.
Paolo
> /*
> * Real mode guest segments register DPL should be zero.
> * Older KVM version were setting it wrongly.
> @@ -896,6 +902,24 @@ static const VMStateDescription vmstate_tsc_khz = {
> }
> };
>
> +static bool mcg_ext_ctl_needed(void *opaque)
> +{
> + X86CPU *cpu = opaque;
> + CPUX86State *env = &cpu->env;
> + return cpu->enable_lmce && env->mcg_ext_ctl;
> +}
> +
> +static const VMStateDescription vmstate_mcg_ext_ctl = {
> + .name = "cpu/mcg_ext_ctl",
> + .version_id = 1,
> + .minimum_version_id = 1,
> + .needed = mcg_ext_ctl_needed,
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT64(env.mcg_ext_ctl, X86CPU),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> VMStateDescription vmstate_x86_cpu = {
> .name = "cpu",
> .version_id = 12,
> @@ -1022,6 +1046,7 @@ VMStateDescription vmstate_x86_cpu = {
> #ifdef TARGET_X86_64
> &vmstate_pkru,
> #endif
> + &vmstate_mcg_ext_ctl,
> NULL
> }
> };
>
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