From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A0B5B640 for ; Wed, 30 Apr 2025 00:49:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745974192; cv=none; b=f87Q/muXMNYGaUWbU7xVyvOmyyrKoqUaXmKe6yzzcWLeFaUYloVdK9/XtbPZiAzukDC/by0gwNtPIUG/DGF2mJmE7voONjPr+EbhvIHkzoEp2Omsgs5A1+F1NzXBWT6wd/Coq00UWcN7pW2xJqCWc4CmtKCAyC0mXH7BA7Nr3UE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745974192; c=relaxed/simple; bh=yEUjYaeDDlAF5tuKvlWCruGq7x1qt3DIEsIyspyx7mY=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=SOWcVdUFzAuQCOSzeH93TwoY7wNrg71kcYLu2zv8IR/I3q0vvRXphvygjNtaDh9prN3jnFuYxCg7A2TDEVBKaHPOKW/AfBFHTkDkoapCI3fnp0bYgE9iQtE1cq3xz0Oz2dlO/ozmhEYqJ9Jkbtr9YVZAx9SwcJFCtF+IQKg6cs8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--yepeilin.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=fIkLe+gg; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--yepeilin.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fIkLe+gg" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-227e2faab6dso54052885ad.1 for ; Tue, 29 Apr 2025 17:49:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1745974191; x=1746578991; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=uVJn6R8AyLKP9RLCMrKJhUthQHLHAwUZd1bqoncqyPg=; b=fIkLe+ggcIi+6TuyMiCt4ZNBYtMEGbqblGiQehLp+Y5NQIvUgKMlC9ZjjvCWzNn9oW /fRutw8sRU2lr4ags0OtPTGyUd1uzWwE2NZVfisYub+3lhQM1RYtDOkqNMzTrobnmzJy mfDPltJ6PebC8aUsGzzncAMBNkFrjWqVsZTNM/YZXopxo4t/bwGBT2K6UiPGf3UDmEyP SfHzTymawBwl7i76tbzH55crCCPMWFQTBVwx5ikNWp5Va3odRenGMjxKH+vIBS+gAmLn EKV7RZ19kUsiuHrIsz+meGSjd3nvvrRSs6nFAgrnkdiNbiqtcHeXaLkZe8obBN4/iZ9w adzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745974191; x=1746578991; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=uVJn6R8AyLKP9RLCMrKJhUthQHLHAwUZd1bqoncqyPg=; b=wz7TConARObcHx9fSZ3srx2X+AuVA3ZnLxjqm23lcjC1idB/wdQSE43w16b+m7B4+D OocrQCByC1o1qLAgsFM0wucr8IDMnHM8TCnj8PDa9NuMk35o8M32DiRsViCCtFrk5V2l dAAqytEVLO5fpcpcr2L6QiIUWudrbPXkuSEX8OSZ/22iB3ysPhz+bbeHBKoSuXFZ8Uhm BH8xB4ltWT5TTfrI5UIzPT2ZnF2vXNpR0B16enBO6mg4JECuhRViIpT14Zsqb+lNT1wF QI/345Pa04ICDTVHEi4pwMOs72rgSDpSrpr5fonMeqXJlxcjH34Qres6CPwirlb86rt6 1+Kg== X-Gm-Message-State: AOJu0YwuFI+cHwlYI95WQZJxkywqKv0YOcbiHMTh2/9O+0Z1lxHGEsqZ q9wlb4rZIcNPamBOvn5ccA0D5p9GPeFibO9/93ZS/pji87Fb6JSyGlgq4YofT18xvrD43Sudtea 6kIyTwceH+F0nbo1pbiYQSZuMjH8uPNT0P0qWbPceceMgMozbH8T9RoisNB84QMUVpChuuDlc+x naPQy6eT9n6tNfhUvK5pH05/nm4hUMJjfyV5kuR98= X-Google-Smtp-Source: AGHT+IF9zsphPMP1HajZC8Eo2sh2+VzDRKm+YZlHx2A2vQLcAL4BFROSnhFTkQQBucvMfF5NEp7t7fHg/OmYfg== X-Received: from pgbcr13.prod.google.com ([2002:a05:6a02:410d:b0:af2:4edb:7793]) (user=yepeilin job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:2ec8:b0:223:60ce:2451 with SMTP id d9443c01a7336-22df57a5cabmr8537185ad.15.1745974190699; Tue, 29 Apr 2025 17:49:50 -0700 (PDT) Date: Wed, 30 Apr 2025 00:48:53 +0000 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.49.0.901.g37484f566f-goog Message-ID: Subject: [PATCH bpf-next 0/8] bpf, riscv64: Support load-acquire and store-release instructions From: Peilin Ye To: bpf@vger.kernel.org Cc: Peilin Ye , linux-riscv@lists.infradead.org, Andrea Parri , "=?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?=" , Pu Lehui , Puranjay Mohan , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , "Paul E. McKenney" , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Luke Nelson , Xi Wang , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Mykola Lysenko , Shuah Khan , Josh Don , Barret Rhoden , Neel Natu , Benjamin Segall Content-Type: text/plain; charset="UTF-8" Hi all! Patchset [1] introduced BPF load-acquire (BPF_LOAD_ACQ) and store-release (BPF_STORE_REL) instructions, and added x86-64 and arm64 JIT compiler support. As a follow-up, this patchset supports load-acquire and store-release instructions for the riscv64 JIT compiler, and introduces some related selftests/ changes. Specifically: * PATCH 1 makes insn_def_regno() handle load-acquires properly for bpf_jit_needs_zext() (true for riscv64) architectures * PATCH 2, 3 from Andrea Parri add the actual support to the riscv64 JIT compiler * PATCH 4 optimizes code emission by skipping redundant zext instructions inserted by the verifier * PATCH 5, 6 and 7 are minor selftest/ improvements * PATCH 8 enables (non-arena) load-acquire/store-release selftests for riscv64 Please refer to individual patches for details. Thanks! [1] https://lore.kernel.org/all/cover.1741049567.git.yepeilin@google.com/ Andrea Parri (2): bpf, riscv64: Introduce emit_load_*() and emit_store_*() bpf, riscv64: Support load-acquire and store-release instructions Peilin Ye (6): bpf/verifier: Handle BPF_LOAD_ACQ instructions in insn_def_regno() bpf, riscv64: Skip redundant zext instruction after load-acquire selftests/bpf: Use CAN_USE_LOAD_ACQ_STORE_REL when appropriate selftests/bpf: Avoid passing out-of-range values to __retval() selftests/bpf: Verify zero-extension behavior in load-acquire tests selftests/bpf: Enable non-arena load-acquire/store-release selftests for riscv64 arch/riscv/net/bpf_jit.h | 15 + arch/riscv/net/bpf_jit_comp64.c | 334 ++++++++++++------ arch/riscv/net/bpf_jit_core.c | 3 +- kernel/bpf/verifier.c | 11 +- tools/testing/selftests/bpf/progs/bpf_misc.h | 5 +- .../bpf/progs/verifier_load_acquire.c | 48 ++- .../selftests/bpf/progs/verifier_precision.c | 5 +- .../bpf/progs/verifier_store_release.c | 39 +- 8 files changed, 314 insertions(+), 146 deletions(-) -- 2.49.0.901.g37484f566f-goog