[PATCH 00/13] powerpc/bpf: Some fixes and updates

[Naveen N. Rao]

A set of fixes and updates to powerpc BPF JIT:
- Patches 1-3 fix issues with the existing powerpc JIT and are tagged 
  for -stable.
- Patch 4 fixes a build issue with bpf selftests on powerpc.
- Patches 5-9 handle some corner cases and make some small improvements.
- Patches 10-13 optimize how function calls are handled in ppc64. 

Patches 7 and 8 were previously posted, and while patch 7 has no 
changes, patch 8 has been reworked to handle BPF_EXIT differently.


- Naveen


Naveen N. Rao (13):
  bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()
  powerpc32/bpf: Fix codegen for bpf-to-bpf calls
  powerpc/bpf: Update ldimm64 instructions during extra pass
  tools/bpf: Rename 'struct event' to avoid naming conflict
  powerpc/bpf: Skip branch range validation during first pass
  powerpc/bpf: Emit a single branch instruction for known short branch
    ranges
  powerpc/bpf: Handle large branch ranges with BPF_EXIT
  powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06
  powerpc64/bpf: Do not save/restore LR on each call to
    bpf_stf_barrier()
  powerpc64/bpf: Use r12 for constant blinding
  powerpc64/bpf elfv2: Setup kernel TOC in r2 on entry
  powerpc64/bpf elfv1: Do not load TOC before calling functions
  powerpc64/bpf: Optimize instruction sequence used for function calls

 arch/powerpc/include/asm/ppc-opcode.h |   1 +
 arch/powerpc/net/bpf_jit.h            |   8 +-
 arch/powerpc/net/bpf_jit64.h          |   2 +-
 arch/powerpc/net/bpf_jit_comp.c       |  55 ++++++++++--
 arch/powerpc/net/bpf_jit_comp32.c     |  32 +++++--
 arch/powerpc/net/bpf_jit_comp64.c     | 124 ++++++++++++++------------
 kernel/bpf/stackmap.c                 |   5 +-
 tools/bpf/runqslower/runqslower.bpf.c |   2 +-
 tools/bpf/runqslower/runqslower.c     |   2 +-
 tools/bpf/runqslower/runqslower.h     |   2 +-
 10 files changed, 153 insertions(+), 80 deletions(-)


base-commit: bdcf18e133f656b2c97390a594fc95e37849e682
-- 
2.34.1