powerpc64/bpf: Support tailcalls with subprogs

Browse source

Enable tailcalls support in subprogs by passing tail call count as
reference instead of value. The actual tailcall count is always
maintained in the tailcall field present in the frame of main
function (also called entry function). The tailcall field in the
stack frame of subprogs contains reference to the tailcall field
in the stack frame of main BPF program. Accordingly, rename
tail_call_cnt field in the stack layout to tail_call_info.

Signed-off-by: Abhishek Dubey <adubey@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260124075223.6033-3-adubey@linux.ibm.com

...

This commit is contained in:

Abhishek Dubey 2026-01-24 13:22:19 +05:30 • committed by Madhavan Srinivasan

parent 15513beeb6

commit 2ed2d8f6fb

3 changed files with 122 additions and 22 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

arch/powerpc/net/bpf_jit.h

View file

63

arch/powerpc/net/bpf_jit_comp.c

View file

74

arch/powerpc/net/bpf_jit_comp64.c

View file