From: Michael Ellerman mpe@ellerman.id.au
[ 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 --- arch/powerpc/platforms/Kconfig.cputype | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 87bc1929ee5a..e2e1fec91c6e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -107,6 +107,7 @@ 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 @@ -295,7 +296,7 @@ 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 select PPC_KUEP