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From: Leon Hwang <leon.hwang@linux.dev>
To: bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	jolsa@kernel.org, eddyz87@gmail.com, leon.hwang@linux.dev,
	kernel-patches-bot@fb.com
Subject: [PATCH bpf-next 0/2] bpf, x64: Introduce two tailcall enhancements
Date: Mon, 21 Oct 2024 21:39:27 +0800	[thread overview]
Message-ID: <20241021133929.67782-1-leon.hwang@linux.dev> (raw)

This patch set introduces two enhancements aimed at improving tailcall
handling in the x64 JIT:

1. Tailcall info is propagated to a subprog only if the subprog is
   tail_call_reachable.
2. Tailcall info is propagated through the trampoline only when the target
   is a subprog and it is tail_call_reachable.

Leon Hwang (2):
  bpf, x64: Propagate tailcall info only for tail_call_reachable
    subprogs
  bpf, verifier: Check trampoline attach target is tail_call_reachable
    subprog

 arch/x86/net/bpf_jit_comp.c |  4 +++-
 include/linux/bpf.h         |  1 +
 kernel/bpf/verifier.c       | 10 +++++++++-
 3 files changed, 13 insertions(+), 2 deletions(-)

-- 
2.44.0


             reply	other threads:[~2024-10-21 13:39 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-21 13:39 Leon Hwang [this message]
2024-10-21 13:39 ` [PATCH bpf-next 1/2] bpf, x64: Propagate tailcall info only for tail_call_reachable subprogs Leon Hwang
2024-10-21 17:49   ` Yonghong Song
2024-10-22  1:46     ` Leon Hwang
2024-10-24  2:29       ` Yonghong Song
2024-10-24  3:33         ` Leon Hwang
2024-10-24 16:38           ` Yonghong Song
2024-10-24 16:56             ` Yonghong Song
2024-10-24 17:01   ` Yonghong Song
2024-10-24 22:09   ` Alexei Starovoitov
2024-10-25  2:37     ` Leon Hwang
2024-10-21 13:39 ` [PATCH bpf-next 2/2] bpf, verifier: Check trampoline target is tail_call_reachable subprog Leon Hwang
2024-10-24  2:46   ` Yonghong Song
  -- strict thread matches above, loose matches on Subject: below --
2024-10-28 13:40 [PATCH bpf-next 0/2] bpf, x64: Introduce two tailcall enhancements Leon Hwang

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