forked from Mirrors/opensbi

Instruction TLB can fail to respect a non-global SFENCE thus we need to flush the TLB using SFENCE.VMA x0, x0 See full description of CIP-1200 in Errata_FU740-C000_20210205 from https://www.sifive.com/boards/hifive-unmatched Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>