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 7BC61C021A9 for ; Tue, 18 Feb 2025 01:44:57 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=U/wiVg/zVTmmdVAuSQhntXuT5npvM1Nuq/OCCNwlVXw=; b=Oo67z86FfpIDO94dWkMiAxxory zpEIDG9JlofD5fss0ObaQwKoBNSU3udvQJr3NVGTP/PP0ybKWcMAIVN+0VsVphsoyoEoKtYWvcgX9 EiBglOkNqg40qbNAIZKoWShCNnp4z/PZtQ0LuaGQ5jnW56eFTn4HfCCdaJYwp8TFo1f1x6v/ARUaC Y77cooqjzO+HO47B5cQavzhw71Nnm3zjdf7UHBqqpiPRw33KaESaMrlQIi98EnBWldVRSTD4wDvrr kVb0jRHLM6N4zrNc5qItKbmiPyl3C4+PrJFgqO+nwFgindCQcHtChkKsQvBIjR/O3lJlSSWhA/nSa 7iJ8D9aQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tkCfC-00000006SUi-1d4a; Tue, 18 Feb 2025 01:44:42 +0000 Received: from out30-99.freemail.mail.aliyun.com ([115.124.30.99]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tkCdi-00000006SN8-42gy for linux-arm-kernel@lists.infradead.org; Tue, 18 Feb 2025 01:43:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1739842987; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type; bh=U/wiVg/zVTmmdVAuSQhntXuT5npvM1Nuq/OCCNwlVXw=; b=r+HfFgmlXZJoyXuXQRJg/HWLbIjlHaeJdYESoxgfEvMn+umzBNGimYUs4s2rhNBViGRUyJld/Ar7ib9b0bn21dnHABd1h8kCifgdYn7uq6XewFJx4zsse6KOl9sXIY0U3wzvniTHtUrk1HGUrfIcEnchpboiWJ8SXp1csUW3YEs= Received: from U-V2QX163P-2032.local(mailfrom:fengwei_yin@linux.alibaba.com fp:SMTPD_---0WPjtOnc_1739842982 cluster:ay36) by smtp.aliyun-inc.com; Tue, 18 Feb 2025 09:43:03 +0800 Date: Tue, 18 Feb 2025 09:43:02 +0800 From: YinFengwei To: robin.murphy@arm.com, will@kernel.org, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jie.li.linux@linux.alibaba.com Subject: Re: [PATCH] perf/arm-cmn: don't claim resource during ioremap() for CMN700 with ACPI Message-ID: References: <20250218012111.30068-1-fengwei_yin@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250218012111.30068-1-fengwei_yin@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250217_174311_492871_838B9966 X-CRM114-Status: UNSURE ( 9.43 ) 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 On Tue, Feb 18, 2025 at 09:21:11AM +0800, Yin Fengwei wrote: > Currently, arm-cmn PMU driver assumes ACPI claim resource > for CMN600 + ACPI. But with CMN700 + ACPI, the device probe > failed because of resource claim failes when ioremap() is > called: > [ 10.837300] arm-cmn ARMHC700:00: error -EBUSY: can't request region for resource [mem 0x40000000-0x4fffffff] > [ 10.847310] arm-cmn ARMHC700:00: probe with driver arm-cmn failed with error -16 > [ 10.854726] arm-cmn ARMHC700:02: error -EBUSY: can't request region for resource [mem 0x40040000000-0x4004fffffff] > [ 10.865085] arm-cmn ARMHC700:02: probe with driver arm-cmn failed with error -16 > > Let CMN700 + ACPI do same as CMN600 + ACPI to allow CMN700 > work in ACPI env. > > Signed-off-by: Yin Fengwei > --- > I am also wondering whether we could just drop the CMN600 part id > check here if ACPI companion device claimed the resource? > Sorry. Just saw the link https://lore.kernel.org/all/1676535470-120560-1-git-send-email-renyu.zj@linux.alibaba.com/ after I hit send button. May continue the discussion there. Thanks. Regards Yin, Fengwei