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powerpc: make ALTIVEC select PPC_FPU 

On a kernel config with ALTIVEC=y and PPC_FPU not set/enabled,
there are build errors:

drivers/cpufreq/pmac32-cpufreq.c:262:2: error: implicit declaration of function 'enable_kernel_fp' [-Werror,-Wimplicit-function-declaration]
           enable_kernel_fp();
../arch/powerpc/lib/sstep.c: In function 'do_vec_load':
../arch/powerpc/lib/sstep.c:637:3: error: implicit declaration of function 'put_vr' [-Werror=implicit-function-declaration]
  637 |   put_vr(rn, &u.v);
      |   ^~~~~~
../arch/powerpc/lib/sstep.c: In function 'do_vec_store':
../arch/powerpc/lib/sstep.c:660:3: error: implicit declaration of function 'get_vr'; did you mean 'get_oc'? [-Werror=implicit-function-declaration]
  660 |   get_vr(rn, &u.v);
      |   ^~~~~~

In theory ALTIVEC is independent of PPC_FPU but in practice nobody
is going to build such a machine, so make ALTIVEC require PPC_FPU
by selecting it.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210421210647.20836-1-rdunlap@infradead.org
This commit is contained in:
Randy Dunlap 2021-04-21 14:06:47 -07:00 committed by Michael Ellerman
parent 7d94627657
commit 389586333c
1 changed files with 1 additions and 0 deletions
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arch/powerpc/platforms/Kconfig.cputype
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@ -308,6 +308,7 @@ config PHYS_64BIT
config ALTIVEC
bool "AltiVec Support"
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
select PPC_FPU
help
This option enables kernel support for the Altivec extensions to the
PowerPC processor. The kernel currently supports saving and restoring