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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2021-10-06 01:55:28 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2021-10-07 19:52:59 +1100
commit48164fccdff6d5cc11308126c050bd25a329df25 (patch)
treec52e0477d2d3174ba641cc19c55178fd8dbc9208 /arch
parente8278d44443207bb6609c7b064073f353e6f4978 (diff)
downloadlinux-48164fccdff6d5cc11308126c050bd25a329df25.tar.gz
powerpc/bpf ppc32: Do not emit zero extend instruction for 64-bit BPF_END
Suppress emitting zero extend instruction for 64-bit BPF_END_FROM_[L|B]E operation. Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32") Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/b4e3c3546121315a8e2059b19a1bda84971816e4.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/net/bpf_jit_comp32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c
index 7c65de9ed4fa..68dc8a8231de 100644
--- a/arch/powerpc/net/bpf_jit_comp32.c
+++ b/arch/powerpc/net/bpf_jit_comp32.c
@@ -1107,7 +1107,7 @@ cond_branch:
return -EOPNOTSUPP;
}
if (BPF_CLASS(code) == BPF_ALU && !fp->aux->verifier_zext &&
- !insn_is_zext(&insn[i + 1]))
+ !insn_is_zext(&insn[i + 1]) && !(BPF_OP(code) == BPF_END && imm == 64))
EMIT(PPC_RAW_LI(dst_reg_h, 0));
}