From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75D6F3C197F; Tue, 26 May 2026 20:59:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779829200; cv=none; b=LPBSEY3kM3fB6276PFGSaTfyPz1eKrITCo5V9a139B0KrDf12JYeu7BpgHkYQqgGWarTf97fkmIsOkhFsl0vyRqDyHAA1vdkzYoFOyxNK72+Xk5GODYBAB9/fdG7YbYvr72Z6dVWldVuJhKeFsxNMUhUSNxQ+Y5JM3Pl4liayzY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779829200; c=relaxed/simple; bh=nmnXOS7eAb/+qx/rVlnbGfjDPGW6H6UyJnkkB6UAGn8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N3EQeoRyKwhEn1zKe7QMYyOsrAojajhdS+Y5k+UMELTV8gc6yrG5nHxPFr2z1zNwT0JTY03RSbg2ythG3NzM5SdZpGLAsxeE5rw8Z2kA59eN4oa0vgnp7n5oVBuLr4QK5s1j4o8xd+0we4nxsTllzKAcFAvxQ1/Lf3zczeJvYdo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZYATIZKb; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZYATIZKb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E84D81F000E9; Tue, 26 May 2026 20:59:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779829199; bh=WBLw/3Dgjn1AFQz5j+xOU3Lx44NupKqGdqngWQoVYVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZYATIZKbbZVgLVTNirtw21H8HaVCHcsRi+ONOFRrtTsVrZEoZzcl8eMKgXZhShHDy pgDDYRt7D2YQxToU0to9TjseEbTY8yWRP991Kb+YKkr4fnt5JR2h/ThzG+zg/WqZ63 Io9mxdPWSeno6bKdCbcJmESjcMleSTLSCxpddKsDJQBo2gLBQipwfbd5xsWBp+n/Nz 2tb+0yyv/UMXrkcQIOBUV4ikT+vWPA1u4CyOoD/OCzSXp0kCB67nxgWmv/ShCk3Sso CkiKrpye41Rmz73h4DCQ3gq9MXi9p8Vne25612DL1Xo2mc8hy0qFkPtXReouxk+sl8 /16zXZ/elgVkQ== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Ingo Molnar , Masami Hiramatsu , Andrii Nakryiko Cc: Jakub Sitnicki , bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv4 08/13] selftests/bpf: Emit nop,nop10 instructions combo for x86_64 arch Date: Tue, 26 May 2026 22:58:35 +0200 Message-ID: <20260526205840.173790-9-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260526205840.173790-1-jolsa@kernel.org> References: <20260526205840.173790-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Syncing latest usdt.h change [1]. Now that we have nop10 optimization support in kernel, let's emit nop,nop10 for usdt probe. We leave it up to the library to use desirable nop instruction. [1] TBD Reviewed-by: Jakub Sitnicki Signed-off-by: Jiri Olsa --- tools/testing/selftests/bpf/usdt.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/usdt.h b/tools/testing/selftests/bpf/usdt.h index c71e21df38b3..75687f50f4e2 100644 --- a/tools/testing/selftests/bpf/usdt.h +++ b/tools/testing/selftests/bpf/usdt.h @@ -313,7 +313,7 @@ struct usdt_sema { volatile unsigned short active; }; #if defined(__ia64__) || defined(__s390__) || defined(__s390x__) #define USDT_NOP nop 0 #elif defined(__x86_64__) -#define USDT_NOP .byte 0x90, 0x0f, 0x1f, 0x44, 0x00, 0x0 /* nop, nop5 */ +#define USDT_NOP .byte 0x90, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 /* nop, nop10 */ #else #define USDT_NOP nop #endif -- 2.54.0