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When writing a register from the TCTXT memory region (4th page within the IC BAR), we were overwriting the Presentation Controller (PC) register at the same offset. It looks like a silly cut and paste error. We were somehow lucky: the TCTXT registers being touched are TCTXT_ENx/_SET/_RESET to enable physical threads and the PC registers at the same offset are either not used by our model or the update was harmless. Found through code inspection. Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20220523151859.72283-1-fbarrat@linux.ibm.com> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>