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 3BAD3EB64D7 for ; Tue, 20 Jun 2023 20:42:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YVgdNhS+F3FQ3R59eNIJUdIITh4/L8Sfs3qAWs/kUSE=; b=04jwGlv/a79Abd 1ON7TtARV9qsXm1HedzCjrIFvVtzZaafBk6c40FE2wxHXOXBbAmanC5GxTTAY95aqgWKLHSFRRm3P w6LpVFYPUhL1Qo+zKWLl/YxveRspZ+ZYPtt+wEywoTkJX9Zc1BpmXTuI0/Fz+i1ZJq/JH9h3Tl7eN XS3njJXWwXQP5tpHdaWy+xgP1Ti5O9pIUSqPB9F1B6FAcMLj4DQniQ7JAIBl1saMAMKRqHA3LdrJz sX6g9nB3vOXP3l9VkhV+AzSKf8sN3E9i4n6g7SHIHsu00cnermMdAK6QU9JtQWW31W2jtGfN+SH98 4Uh+j+YMvJBQh1z2cAig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qBiAq-00CJk9-2V; Tue, 20 Jun 2023 20:42:00 +0000 Received: from out-47.mta0.migadu.com ([91.218.175.47]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qBiAo-00CJim-06 for linux-arm-kernel@lists.infradead.org; Tue, 20 Jun 2023 20:41:59 +0000 Date: Tue, 20 Jun 2023 20:41:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1687293715; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=L64YVDXOUKmyXfZrd6jQHjCOQDs1molwdJ5PUzFNgJ0=; b=HH7Xq/r7d7te0s8mmsjqnMWH3FKTfjbMgo+hJvRRlsFTj10T3ZKyDQke0UYzxLAFVrbeSo N0z5scK+Eb8MzeofcMgg60O5s531IdMwpTA2vIBgdQJKdOJVINMkHW4vAYXjnRiZPiCKXF s4j+TfnS7njzApxhClSoZlG61QqMkRs= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: Mark Brown Cc: Neil Armstrong , Joey Gouly , linux-arm-kernel@lists.infradead.org, Bjorn Andersson , nd@arm.com, catalin.marinas@arm.com, james.morse@arm.com, mark.rutland@arm.com, maz@kernel.org, shuah@kernel.org, suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com, linux-arm-msm Subject: Re: [PATCH v4 16/20] arm64: enable Permission Indirection Extension (PIE) Message-ID: References: <20230606145859.697944-1-joey.gouly@arm.com> <20230606145859.697944-17-joey.gouly@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230620_134158_490520_B8431769 X-CRM114-Status: GOOD ( 13.49 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jun 20, 2023 at 09:27:18PM +0100, Mark Brown wrote: > On Tue, Jun 20, 2023 at 09:16:05PM +0200, Neil Armstrong wrote: > > > This patch on linux-next causes a great amount of: > > > X xxx.xxxxxx Emulated RAZ for ID register: ISS 0x36002f > > > messages printed by the system firmware on the Qualcomm SM8550 SoC, > > and the platform is barely usable. > > Regardless of what the kernel is doing it looks like there's a firmware > issue here, all otherwise undefined registers in the ID space should be > RAZ so spamming the logs like this isn't great. Agreed. This isn't a kernel issue... We already do 2 ID register reads in __cpu_setup(), so can't really blame this change for adding a third. This stinks of Gunyah: https://github.com/quic/gunyah-hypervisor/blob/3d4014404993939f898018cfb1935c2d9bfc2830/hyp/vm/vcpu/aarch64/src/sysreg_traps.c#L1177 -- Thanks, Oliver _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel