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The PSP spec states that the lower 31b of the SPI need to be non-zero. Though not in the spec, I think it is reasonable to reset the lower 31b of the spi space after a key rotation, and to also decline to generate session keys when the lower 31b saturate. Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20260515-spi-handle-v1-1-debf8cb467cb@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>