From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C1E5DC79F82 for ; Wed, 9 Sep 2026 02:01:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=0uEessHzcSfxsC9/R4E/G5cHhOHZfHSBc4M8wjJU3EI=; b=tTgRgICnHcALGx9wzrJJfj8ZCX 67aGVRurKWpBElYPVw1A1WOXxqY47Z/RWcnARiVitdDKybmlEm51NWJelTdjTs42OscF85a7lRRaN QnrmundS/O9YwVP+Vlr/p6p1ZrJaq/bSVnRz2ePqinkFytqWxISCx6xQU5IBO7WmRfyC4iKqSQd/L evtm+DC34olHd2Y2v5uEGawvaHHeswSt6Zo7AqDjCxvHvUw47WlyERafipS3qqCRfXaaYtDBAQEED FrQDwHZ2IgQu//4vxv+X3N3SfUCTkKFuqsIuHfjiFFKOfOr2JrUPtgGHK0fVhOcxo4Eqp8k1bfkzU lqN7zKjg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x47d4-0000000Ae3f-2Trs; Wed, 09 Sep 2026 02:01:38 +0000 Received: from mail-m83119.xmail.ntesmail.com ([156.224.83.119]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x47cy-0000000Ae2P-049V for linux-arm-kernel@lists.infradead.org; Wed, 09 Sep 2026 02:01:37 +0000 Received: from [127.0.0.1] (unknown [122.224.241.34]) by smtp.qiye.163.com (Hmail) with ESMTP id 4d0ba6a2f; Wed, 9 Sep 2026 10:01:22 +0800 (GMT+08:00) Message-ID: Date: Wed, 9 Sep 2026 10:01:22 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] perf/arm-cmn: Fix {wp_dev_sel2, wp_dev_sel} limited to 0/1 when MXP_MULTIPLE_DTM_EN is TRUE To: Robin Murphy , will@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, peter.du@hj-micro.com, andy.xu@hj-micro.com, allen.wang@hj-micro.com References: <20260819105443.668784-1-allen.wang@hj-micro.com> <58adffd2-6ef4-4a4c-ba3a-3f510522d928@arm.com> Content-Language: en-US From: "allen.wang" In-Reply-To: <58adffd2-6ef4-4a4c-ba3a-3f510522d928@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-HM-Tid: 0aa083e5fbc009d8kunme32fd7ee3c8753 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlDThoeVkofQxgYSUJPTh5NHlYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlKSUlVSUlPVUlPSlVIT1lXWRYaDxIVHRRZQVlPS0hVQk JJTktVSktLVUpCS0JZBg++ DKIM-Signature: a=rsa-sha256; b=a8vY9GZLrLFJA9Epxm8DFpwotP6Ktm3Iv64lfTXz0NlLfQ8OZ7jl/dPdtyJ6kZaxEVLGF8cpv/ODOehuhRhUE/VACwMMcH8KrFCKmWZDGcm1wercTeuFL7GSn5bADXqReIKm/HEE4Syr7vjctGHZgqtKOa8uQuImylIGGx3DDi8=; c=relaxed/relaxed; s=default; d=hj-micro.com; v=1; bh=0uEessHzcSfxsC9/R4E/G5cHhOHZfHSBc4M8wjJU3EI=; h=date:mime-version:subject:message-id:from; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260908_190134_305748_1A50E487 X-CRM114-Status: UNSURE ( 3.96 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Robin: Yes, that's exactly what I'm saying. I've tested this on actual multi-DTM hardware, and the hardware does not ignore wp_dev_sel2 automatically — it must be correctly configured by software. Thanks! Allen On 9/8/2026 11:04 PM, Robin Murphy wrote: > https://support.arm.com/documentation/102308/0307/Debug-trace-and-PMU/ > Debug-Trace-system-overview/DTM-watchpoint?lang=en