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target/ppc: Add two missing register callbacks on POWER10
This patch adds tcg accessors for 2 SPRs which were missing on P10: - the TBU40 register is used to write the upper 40 bits of the timebase register. It is used by kvm to update the timebase when entering/exiting the guest on P9 and above. The missing definition was causing erratic decrementer interrupts in a pseries/kvm guest running in a powernv10/tcg host, typically resulting in hangs. - the missing DPDES SPR was found through code inspection. It exists unchanged on P10. Both existed on previous versions of the processor and a bit of git archaeology hints that they were added while the P10 model was already being worked on so they may have simply fallen through the cracks. Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com> Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com> Message-Id: <20220411125900.352028-1-fbarrat@linux.ibm.com> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
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