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Commit f4f09b79 authored by Radim Krčmář's avatar Radim Krčmář Committed by Greg Kroah-Hartman
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KVM: x86: do not save guest-unsupported XSAVE state



commit 00c87e9a upstream.

Saving unsupported state prevents migration when the new host does not
support a XSAVE feature of the original host, even if the feature is not
exposed to the guest.

We've masked host features with guest-visible features before, with
4344ee98 ("KVM: x86: only copy XSAVE state for the supported
features") and dropped it when implementing XSAVES.  Do it again.

Fixes: df1daba7 ("KVM: x86: support XSAVES usage in the host")
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8b51676d
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