powerpc/bpf: Add support for instruction array and indirect jump

From: Abhishek Dubey <adubey@linux.ibm.com>

The first 2 patch enable support for instruction array. Now, the
instruction offset map maintain the mapping:
original inst -> xlated inst -> jited inst

The last two patch enable support for indirect jump. Any eligile
register can store jump target address for control flow to jump.

The later features will be enabled on ppc32 in a separate series.

The patch series is rebased over:
https://lore.kernel.org/bpf/20260401141043.41513-1-adubey...

All selftest related to instruction array and indirect jump
are passing on ppc64.

# ./test_progs-cpuv4 -n 20
#20/1    bpf_gotox/one-switch:OK
#20/2    bpf_gotox/one-switch-non-zero-sec-offset:OK
#20/3    bpf_gotox/two-switches:OK
#20/4    bpf_gotox/big-jump-table:OK
#20/5    bpf_gotox/static-global:OK
#20/6    bpf_gotox/nonstatic-global:OK
#20/7    bpf_gotox/other-sec:OK
#20/8    bpf_gotox/static-global-other-sec:OK
#20/9    bpf_gotox/nonstatic-global-other-sec:OK
#20/10   bpf_gotox/one-jump-two-maps:OK
#20/11   bpf_gotox/one-map-two-jumps:OK
#20/12   bpf_gotox/check-ldimm64-off:OK
#20/13   bpf_gotox/check-ldimm64-off-gotox:OK
#20      bpf_gotox:OK
Summary: 1/13 PASSED, 0 SKIPPED, 0 FAILED

# ./test_progs-cpuv4 -n 21
#21/1    bpf_insn_array/one2one:OK
#21/2    bpf_insn_array/simple:OK
#21/3    bpf_insn_array/deletions:OK
#21/4    bpf_insn_array/deletions-with-functions:OK
#21/5    bpf_insn_array/blindness:OK
#21/6    bpf_insn_array/incorrect-index:OK
#21/7    bpf_insn_array/load-unfrozen-map:OK
#21/8    bpf_insn_array/no-map-reuse:OK
#21/9    bpf_insn_array/bpf-side-ops:OK
#21      bpf_insn_array:OK
Summary: 1/9 PASSED, 0 SKIPPED, 0 FAILED

v2->v3:
  Address minor comments
  Collecting Tested-by and Acked-by tags
v1->v2:
  Handle image offset for ABIv1

[v2]: https://lore.kernel.org/bpf/20260227014315.39980-1-adubey...
[v1]: https://lore.kernel.org/bpf/20260225010950.20218-1-adubey...

Abhishek Dubey (4):
  powerpc/bpf: Add support for instruction array
  selftest/bpf: Enable instruction array test for powerpc
  powerpc64/bpf: Add support for indirect jump
  selftest/bpf: Enable gotox tests for powerpc64

 arch/powerpc/net/bpf_jit_comp.c                         | 7 +++++++
 arch/powerpc/net/bpf_jit_comp64.c                       | 8 ++++++++
 tools/testing/selftests/bpf/prog_tests/bpf_insn_array.c | 2 +-
 tools/testing/selftests/bpf/progs/verifier_gotox.c      | 4 ++--
 4 files changed, 18 insertions(+), 3 deletions(-)

-- 
2.52.0