This is a backport of the remaining patches from the below series:
https://lore.kernel.org/all/cover.1633464148.git.naveen.n.rao@linux.vnet.ibm.com/ (local)

Kindly apply to the longterm tree for v4.19

Thanks,
Naveen


Naveen N. Rao (5):
  powerpc/lib: Add helper to check if offset is within conditional
    branch range
  powerpc/bpf: Validate branch ranges
  powerpc/bpf: Fix BPF_SUB when imm == 0x80000000
  powerpc/security: Add a helper to query stf_barrier type
  powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC

 arch/powerpc/include/asm/code-patching.h     |  1 +
 arch/powerpc/include/asm/security_features.h |  5 ++
 arch/powerpc/kernel/security.c               |  5 ++
 arch/powerpc/lib/code-patching.c             |  7 +-
 arch/powerpc/net/bpf_jit.h                   | 33 ++++---
 arch/powerpc/net/bpf_jit64.h                 |  8 +-
 arch/powerpc/net/bpf_jit_comp64.c            | 93 ++++++++++++++++----
 7 files changed, 118 insertions(+), 34 deletions(-)


base-commit: 3033e5726834e4c9c8c48cdb2273f33bd105f938
-- 
2.33.1