Le 09/07/2022 à 12:23, Pali Rohár a écrit :

quoted

quoted

   
-ifdef CONFIG_PPC_BOOK3S_64
   ifdef CONFIG_CPU_LITTLE_ENDIAN
-CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
-CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
+CFLAGS-$(CONFIG_PPC_BOOK3S_64) += -mcpu=power8
+CFLAGS-$(CONFIG_PPC_BOOK3S_64) += $(call cc-option,-mtune=power9,-mtune=power8)
   else
-CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
-CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
-endif
-else ifdef CONFIG_PPC_BOOK3E_64
-CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
+CFLAGS-$(CONFIG_PPC_BOOK3S_64) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
+CFLAGS-$(CONFIG_PPC_BOOK3S_64) += $(call cc-option,-mcpu=power5,-mcpu=power4)

So before that change I got -mcpu=power9

Now I get -mtune=power7 -mcpu=power5 -mcpu=power9

I did it like Arnd wrote.

And seems that it does not work and now is fully out of the scope of the
original issue. Now I'm really lost here.

So I nobody comes with better solution, I would prefer to stick with my
original version which targets _only_ e500 cores.

Any other suggestion?

I sent a patch based on the TARGET_CPU logic, does it work for you ?

Christophe