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 AD7C23CAE84; Fri, 3 Jul 2026 11:50:58 +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=1783079459; cv=none; b=acixCZ7yN6OIlPMvrfpKuRH/OM84SxhKsC8J8mOQ5wmR4tHweL4RWfP2ct8FEkVTYNXHZUb4KfaaI+XPIenI9IFA1176O3Ux6tAhVLVwtPyrILpXKUjGngF/Bd8JAevh5rq0tXEa7EcujM+umShBXGbxKCvis4nGQz0ebOeP5fM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783079459; c=relaxed/simple; bh=2anvF2MBrTUymTlDnJlX3XamEte6wqwKAid41DAzUMI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aBNN1aUlDSAvo4bnCNq2ryZayLdoP2NoPysAMh/R+Lpbfv8ne6Q5jMKsh1odPF14sWhfD1mwTz0Qd6CLmQpHArsNTgKaE65hFxASGxD79OVlOTrxT+jpbdnPxFkIM1bslMGJ2lmqCyK+d+LimL1fLWa0tkEjdoUQZF4lPK61oII= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kv49Bx9p; 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="kv49Bx9p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08C4C1F000E9; Fri, 3 Jul 2026 11:50:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783079458; bh=lYP28YNEMlDsReRQ3Q75CDsMRCj7szHwFdbQSIaG2lc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kv49Bx9pDoUYEAVpPTIoeGiz8OetWtMzvT61/wq9jSbP4S8Dhgh+zKW6bKvDkPbOf Y3d2HILmE54yK2tuW7hxbtzjs7wRVVZSUD0t/5g408jkFUUYirCsuTuABdcfgGll/P awaUj6FBcRrUBklVQcimsacqJRwjKjXihnqbCQ4c6cIeWIs04tXo2v+4FLlGlcbKf9 OhgtnR8SZBv56DlmyXsy22Hx5Z9OezgvNs4LZ4NpXzMPpHRBoMvF/DFfgxiDeNpo0G ud7GTSUBmbbOhWcfRh3fxKj2cbqCpL77N0JIqJRb8YwnyO0Sgdd7CMzPjLhF/WmJfG Jwa2cQXhBKwXg== 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: [PATCHv6 08/13] selftests/bpf: Emit nop,nop10 instructions combo for x86_64 arch Date: Fri, 3 Jul 2026 13:49:12 +0200 Message-ID: <20260703114917.238144-9-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260703114917.238144-1-jolsa@kernel.org> References: <20260703114917.238144-1-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] https://github.com/libbpf/usdt/commit/9018f82577d1dad7ed628d9efdaffc09f8f2241b 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