[Bug 61971] Migration problem of qemu-kvm guests

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https://bugzilla.kernel.org/show_bug.cgi?id=61971

--- Comment #11 from Paolo Bonzini <bonzini@xxxxxxx> ---
This is XSAVE -> non-XSAVE migration.  Alexander Graf reported to me on IRC
that the XSAVE patches we recently committed to kvm/next fixed this for him. 
xstate_bv is saved as 7 and this check fails on the destination:

                if (xstate_bv & ~XSTATE_FPSSE)
                        return -EINVAL;

I think it is because your CPU has xsave but not xsaveopt.

However, those patches introduced regressions that have to be fixed.  I'll look
at those soon, but your bug should get fixed in 3.13.

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