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 1BDA6C3DA41 for ; Tue, 9 Jul 2024 13:10:48 +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=23z1+1+TbVoQ+nUGZdyfoUDkom9TVTKtzxaWoteC7xA=; b=z0/+NtZo6GKbbK3OxPOD9SMeRH sZ6CdNzaZOs8zZoCBtO1JNOCA9CKDaYjyWDs3zemvPbH6lCs8Wi8VIvpOgLm9Y5uAcjuJcFyULxyg IlzxpvOSqTdaMZYpl3euPa5aQX9E7o5DLlMbtHstBw9feHMhaNK4/UtaCnuH/OkZIXkWWr6nIsdh9 M74dv24SmKpBv+GtGouaNMvDbrii+WhKetbBa8m7GK4DzH+M5p8ub5rVX/mPMP2pJ0JRhEALfShQ1 ndeXrpP+sRW1t0V5m83JHDeScP/l7gKDAqK32tA/DkGJx+kchMcQfPoKtlWIdVM9odd1SBepMcuQ2 e6crafwg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sRAcB-00000007I3P-3DlH; Tue, 09 Jul 2024 13:10:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sRAbv-00000007Hx8-3t8v for linux-arm-kernel@lists.infradead.org; Tue, 09 Jul 2024 13:10:25 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2462F1650; Tue, 9 Jul 2024 06:10:48 -0700 (PDT) Received: from [10.44.160.75] (e126510-lin.lund.arm.com [10.44.160.75]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9B7283F766; Tue, 9 Jul 2024 06:10:15 -0700 (PDT) Message-ID: <48f65838-4da0-401b-8636-c595989cfe05@arm.com> Date: Tue, 9 Jul 2024 15:10:12 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 28/29] kselftest/arm64: Add test case for POR_EL0 signal frame records To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-29-joey.gouly@arm.com> Content-Language: en-GB From: Kevin Brodsky In-Reply-To: <20240503130147.1154804-29-joey.gouly@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240709_061024_039029_29C45D24 X-CRM114-Status: UNSURE ( 6.23 ) 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 03/05/2024 15:01, Joey Gouly wrote: > +static uint64_t get_por_el0(void) > +{ > + uint64_t val; > + > + asm volatile ( > + "mrs %0, " SYS_POR_EL0 "\n" > + : "=r"(val) > + : > + : "cc"); Not sure why we would need "cc" for an MRS? __read_pkey_reg() doesn't use it (maybe we could directly use that function here if including pkey-arm64.h is OK). Kevin > + > + return val; > +}