[PATCH bpf-next 0/2] Allow mixing bpf2bpf calls with tail calls on arm64

[Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>]

This patch set enables using bpf2bpf calls together with tail calls on arm64.
Patch 1 was borrowed from an RFC series for MIPS JIT [1].
Patch 2 gives an explanation of tweaks needed to arm64 BPF JIT.

[1] https://lore.kernel.org/bpf/77dfea2d224e7545e5e4d3f350721d27e5a77b0d.1633392335.git.Tony.Ambardar@xxxxxxxxx/#r

Jakub Sitnicki (1):
  bpf: arm64: Keep tail call count across bpf2bpf calls

Tony Ambardar (1):
  bpf: x64: Add predicate for bpf2bpf with tailcalls support in JIT

 arch/arm64/net/bpf_jit_comp.c | 9 ++++++++-
 arch/x86/net/bpf_jit_comp.c   | 6 ++++++
 include/linux/filter.h        | 1 +
 kernel/bpf/core.c             | 6 ++++++
 kernel/bpf/verifier.c         | 3 ++-
 5 files changed, 23 insertions(+), 2 deletions(-)

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2.35.3