[PATCH v4 0/6] powerpc64/bpf: various fixes

[Hari Bathini <hbathini@linux.ibm.com>]

List of fixes for powerpc64 BPF JIT:
- Patches 1, 2 & 6 fix issues with existing powerpc64 JIT and are
  tagged for -stable.
- Patches 3 & 4 resolve issues with bpf2bpf tailcall support added
  recently.
- Patch 5 resolves an issue reported by bot+bpf-ci@kernel.org while
  adding exceptions support on powerpc64 BPF JIT.

Changes since v3:
- Fixed a minor issue in zero_extend() helper in patch 6 as pointed
  out by bot+bpf-ci@kernel.org.

Changes since v2:
- Added Tested-by tag from Venkat on patches 1, 2  & 4.
- Patches 6 added to fix kfunc call ABI issue on powerpc.
- Fixed a few comments on Abhishek's suggestion.

Changes since v1:
- Addressed couple of review comments from bot+bpf-ci@kernel.org
  in patch 3 & 5.


Hari Bathini (6):
  powerpc64/bpf: do not increment tailcall count when prog is NULL
  powerpc64/bpf: fix the address returned by bpf_get_func_ip
  powerpc64/bpf: use consistent tailcall offset in trampoline
  powerpc64/bpf: remove BPF redzone protection in trampoline stack
  powerpc64/bpf: fix handling of BPF stack in exception callback
  powerpc64/bpf: fix kfunc call support

 arch/powerpc/net/bpf_jit.h        |   5 -
 arch/powerpc/net/bpf_jit_comp.c   | 127 +++++++++------------
 arch/powerpc/net/bpf_jit_comp64.c | 181 +++++++++++++++++++++++-------
 3 files changed, 199 insertions(+), 114 deletions(-)

-- 
2.53.0