From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793373854; b=r/bua6/5O/WeCFE6lP5tmen+01uds+XTdBJ4/AFxhTYy6WtNGeDleKC6W8h9TN5oHAey xxdfFuxbzeIC16TiUyilgkupwYRRTHL+wI7Pix1oym4lNHeSokTzO7ofKQrPtuEchvo7Z CmMhNhH0feDB5sOMylzxKE8MR9y6QehBLaA+zoUC7AG/wkmQ3BfAIk6zBmTjyz22N92Jx bY1TtwxGtNhlUHjGzm8XjGg8KtB9xNpcrvZAsKVQRPEiINAfDw+PgM+grrcsCHBi4E7mI nHBAkKGb2Sl38rkLTLJHre+08v0XzudE1WfZEG+GokMNWu2+OwixEBCiaOm7x7+l/sw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793373854; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=MkMkdb2JGsS58gR8/PBfiOACNGeLM6SFxY60ML9DC6w=; b=C1FsIJz1RfO0CbmDqRh8mO2m+LuXp5BERi4Yb5NsmxADDfOG5O9WpTkDXEsl0B7vPtEg UBJtIIiLcTm3+3RmjS15LRZcdpF/0E8OpBJapVnCPIQttLqsblcqv9iK75XmlWK2Wc1u6 UwDlvKlzbfdfmeO6egwmottMyOOLtyEsiY/PtN6CO5hiHXNE6/PHMiDDCeCViFMH8UzbA xrcgWhp08hpgZuCrPkTT68n2Jh14ur3rnwmFPlaBDgyIr0rd4dg1rq4Dp14uG05XkTzS7 qOFQDuwJCRKU0pEDjmIxfnZT34M1HeZc4sVbsWqEJI8J9DiX1pSPkgMkbSLNx6cZLcw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ke9od7nL; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E977E606A32E for ; Fri, 30 Oct 2026 15:24:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ke9od7nL Received: by smtp.kernel.org (Postfix) with ESMTPSA id 689341F0093A; Fri, 30 Oct 2026 15:24:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793373853; bh=MkMkdb2JGsS58gR8/PBfiOACNGeLM6SFxY60ML9DC6w=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=Ke9od7nLZ+dq1rSprzt0sgvM/izAi0er2t55ft9wAR6O4Q38ParrTg8oKFpwrTl4L aLOQYXd8H31HFws+9UY/buyykSuIulpqQDgMk0r27qw623QeX1czarKIkL0KsCk/vT 07sLFpeQ+8HG113W9IJABqPXOuN0opXVMUE/lhb9DmA6csfhUTjeJibgBv7jOFz5qx 6FdutOYf9a0AB0InNt+m1uUOkdX3Yfci94cvNHM4r8BCGn38EI/AYsSRMzp85taDLF KeJl523mlDl1n3b5ABh1vTU+LiTdTiTYuE3ey5CnZcv+rfYXfrTMntmLNGmKoUp2f7 7ZuP8sbwy/g8g== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v3 13/14] perf tests: Check CoreSight abort entry and exit Reply-To: sashiko-reviews@lists.linux.dev To: "Leo Yan" Cc: linux-perf-users@vger.kernel.org In-Reply-To: <20261030-perf_cs_etm_fix_non_taken-v3-13-7629b52ab047@arm.com> References: <20261030-perf_cs_etm_fix_non_taken-v3-0-7629b52ab047@arm.com> <20261030-perf_cs_etm_fix_non_taken-v3-13-7629b52ab047@arm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 30 Oct 2026 15:24:13 +0000 X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Add page_fault_loop to repeatedly discard an anonymous page with > MADV_DONTNEED and read it again. Each demand fault is resolved without > signal delivery, so the load must be retried at the same PC. >=20 > For example, an expected int/iret pair is: >=20 > int 5ccadc =3D> ffff800080010c00 insn: 00 00 40 39 > ... > iret ffff800080012284 =3D> 5ccadc insn: e0 03 9f d6 >=20 > The LDRB W0, [X0] at 0x5ccadc faults before completing. After resolving > the page fault, the kernel returns via ERET to the same PC to retry it. >=20 > Reviewed-by: James Clark > Signed-off-by: Leo Yan Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261030-perf_cs_et= m_fix_non_taken-v3-0-7629b52ab047@arm.com?part=3D13