From nobody Fri Oct 10 09:53:01 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C8CBC27461; Tue, 17 Jun 2025 06:32:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750141951; cv=none; b=qz2+61QcTYeVmJFUVcNwz9X84qfZNGDFN9FvexQJoMP40oNNuHbS6mHxrIyrjdBFnA6IRxAi3n6wNLfQ4BHjuQip+fE4SSjnCT0W6kA5ZDFLcNS3g0zd7DCCReFek8cjIP7OuOEcxvzChmIgU3g6YuBZcyxuK7C2mJVC+DBGHQ8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750141951; c=relaxed/simple; bh=MQwvrsyatOU2v9XdcxbXbe/0dPzrutKdVRXMXMclAwA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IVCfmvLiYbBTYSbqzOrvmCma39xKfshj2CYK+zOrYSeHR+3pDOXKvoBvja4zdGTSynkp7tibyj32PjD0bB9i+TqZLi2N6qCPy48qxOUZSW4inP+yLyf2dCMo8BBoTIGIHpCk8cTfBLHjNbJn6Nm9JUvmHEub0QqplUlIp0Dctcs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8Axz3PyC1FoljUYAQ--.55626S3; Tue, 17 Jun 2025 14:32:18 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowMDx_MTnC1FoNwIeAQ--.23222S2; Tue, 17 Jun 2025 14:32:10 +0800 (CST) From: Tiezhu Yang To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: Hengqi Chen , bpf@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next] LoongArch, bpf: Set bpf_jit_bypass_spec_v1/v4() Date: Tue, 17 Jun 2025 14:32:06 +0800 Message-ID: <20250617063206.24733-1-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMDx_MTnC1FoNwIeAQ--.23222S2 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoWrKF4kCrW8ury7AF1DtFWkGrX_yoW8JF17pr W2kFnxArs8Xwn7JF43tayrZFW5JF1kGFy7WF129a4Fk3ZxX3WxXr1xK3s8GF4Yyr15XFy8 Wr95C34a9FykAagCm3ZEXasCq-sJn29KB7ZKAUJUUUU5529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUk0b4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v2 6F4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07AIYIkI8VC2zVCFFI0UMc 02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAF wI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxAIw28IcxkI7V AKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCj r7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y0x0EwIxGrwCI42IY6x IIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x 0267AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjxU7_MaUUUUU Content-Type: text/plain; charset="utf-8" JITs can set bpf_jit_bypass_spec_v1/v4() if they want the verifier to skip analysis/patching for the respective vulnerability, it is safe to set both bpf_jit_bypass_spec_v1/v4(), because there is no speculation barrier instruction for LoongArch. Suggested-by: Luis Gerhorst Signed-off-by: Tiezhu Yang Acked-by: Luis Gerhorst --- This is based on the latest bpf-next tree which contains the prototype and caller for bpf_jit_bypass_spec_v1/v4(). By the way, it needs to update bpf-next tree before building on LoongArch: [Build Error Report] Implicit Function declaration for bpf-next tree https://lore.kernel.org/bpf/d602ae87-8bed-1633-d5b6-41c5bd8bbcdc@loongson.c= n/ arch/loongarch/net/bpf_jit.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index fa1500d4aa3e..5de8f4c44700 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -1359,3 +1359,13 @@ bool bpf_jit_supports_subprog_tailcalls(void) { return true; } + +bool bpf_jit_bypass_spec_v1(void) +{ + return true; +} + +bool bpf_jit_bypass_spec_v4(void) +{ + return true; +} --=20 2.42.0