LoongArch: BPF: Add timed may_goto implementation

Implement arch_bpf_timed_may_goto() support and advertise it through
bpf_jit_supports_timed_may_goto() so the verifier lowers may_goto into
the timed variant: instead of a fixed iteration counter, the loop is
bounded by a wall-clock timeout maintained in a per-loop stack slot.

arch_bpf_timed_may_goto() uses a custom calling convention: the verifier
passes the count/timestamp stack offset in BPF_REG_AX and expects the
updated count back in the same register. The JIT call path therefore can
skip the usual 'BPF_REG_0 = C return value' move for this helper.

Acked-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: George Guo <guodongtai@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

0 files changed, 0 insertions, 0 deletions