From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 725773DDDD0; Mon, 18 May 2026 11:01:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779102060; cv=none; b=ehZe8msPER3w3cXiNGtAaCt4pEsaS4CAg9DGMGG/Pp0JHs36UE70xp3U8DMsjODqNb0fErXLEi0BmhrNCJClsggyJGH6J6y939Y9MTUTiNM/Nlbt3gBP2TAE9x4igUOmESJXA8TEyUGOQum1KaKcT2xHHC6+cwBez4U/u+XGpJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779102060; c=relaxed/simple; bh=4e3RD7CJs5riTDF45sJ+aiTLvx8NWQ9y2KW8eoFGhcU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RmPu1FDyZRCUJCZLl2N0NyEmQdyhnkS1mt4RbZvn4diuHVE+T04/BqTxHAgRCt868PZ3Z9xULdKDFnX/Yf6k/+nfb9ZaYNvO2pxjgdowe4EcFCSrEe7N6HA6ED+gVFDu0XIilL2ENrNTP6VY/GrjPM+mFqbt4/F9HqsYoIgpgKU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Aq5x4iaE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Aq5x4iaE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6621AC2BCB7; Mon, 18 May 2026 11:00:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779102059; bh=4e3RD7CJs5riTDF45sJ+aiTLvx8NWQ9y2KW8eoFGhcU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Aq5x4iaEb8JK1LLoV8YQtMH5tMI1CROfDNmj1mmS+OqP1foYiafr0MyVbusiXUez5 WWm6mtwahTG4/G/EAQxNE0Ci0eClxVzy4bztGEJcadlz23G/uVTgKxYziJBxdQ4xsv j9rW1fVReLncXh/jW1Owpzfkdpg6hkAqcvrRPyPf5fLD9ytiMvakYV+gPzbnWuRAc8 Y5thu+D6iylQZ3JbblDDmpmG8ysb+fjrkrvrXMUSK8vHRpkj7HfRwS7PIgAIgmWsro uoy+p73V72thdCZGPwVioFsDBIDDBITxOZNEgFsnWAFb5wm48K0J49AsATeX/SZB04 ORguIpZ3XGneA== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Ingo Molnar , Masami Hiramatsu , Andrii Nakryiko Cc: bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv2 06/11] selftests/bpf: Emit nop,nop10 instructions combo for x86_64 arch Date: Mon, 18 May 2026 12:59:52 +0200 Message-ID: <20260518105957.123445-7-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260518105957.123445-1-jolsa@kernel.org> References: <20260518105957.123445-1-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 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..d359663b9c32 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, 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 /* nop, nop10 */ #else #define USDT_NOP nop #endif -- 2.53.0