powerpc/64e: Tie PPC_BOOK3E_64 to PPC_FSL_BOOK3E

[ Upstream commit 1a76e520ee1831a81dabf8a9a58c6453f700026e ]

Since the IBM A2 CPU support was removed, see commit
fb5a515704d7 ("powerpc: Remove platforms/wsp and associated pieces"),
the only 64-bit Book3E CPUs we support are Freescale (NXP) ones.

However our Kconfig still allows configurating a kernel that has 64-bit
Book3E support, but no Freescale CPU support enabled. Such a kernel
would never boot, it doesn't know about any CPUs.

It also causes build errors, as reported by lkp, because
PPC_BARRIER_NOSPEC is not enabled in such a configuration:

  powerpc64-linux-ld: arch/powerpc/net/bpf_jit_comp64.o:(.toc+0x0):
  undefined reference to `powerpc_security_features'

To fix this, force PPC_FSL_BOOK3E to be selected whenever we are
building a 64-bit Book3E kernel.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220304061222.2478720-1-mpe@ellerman.id.au
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index a208997..87a95cb 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -111,6 +111,7 @@ config PPC_BOOK3S_64
 
 config PPC_BOOK3E_64
        bool "Embedded processors"
+       select PPC_FSL_BOOK3E
        select PPC_FPU # Make it a choice ?
        select PPC_SMP_MUXED_IPI
        select PPC_DOORBELL
@@ -287,7 +288,7 @@ config FSL_BOOKE
 config PPC_FSL_BOOK3E
        bool
        select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
-       select FSL_EMB_PERFMON
+       imply FSL_EMB_PERFMON
        select PPC_SMP_MUXED_IPI
        select PPC_DOORBELL
        default y if FSL_BOOKE