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Evgeny Voevodin
0cfd6c0b5e
Current placement of entropy initialization via Zkr extension requires a trap-based mechanism to handle absent Zkr extension case. In presence of Smrnmi extension no trap-based mechanisms should be used before Smrnmi is detected and enabled otherwise trap will jump to undefined location. Move stack guard initialization into init_coldboot function body after device tree has been parsed so we know if Zkr extension is implemented by the platform which helps to avoid trap-based discovery. init_coldboot() is a safe place to initialize entropy because it doesn't return so no check of __stack_chk_guard against value on entry will be done. Signed-off-by: Evgeny Voevodin <evvoevod@tenstorrent.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/acd52b0f3468758bc5f09e6a45662341b31d4d87.1778176768.git.evvoevod@tenstorrent.com Signed-off-by: Anup Patel <anup@brainfault.org>