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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2C09C2BB55 for ; Wed, 15 Apr 2020 10:47:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABCC420787 for ; Wed, 15 Apr 2020 10:47:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2896622AbgDOKrS (ORCPT ); Wed, 15 Apr 2020 06:47:18 -0400 Received: from foss.arm.com ([217.140.110.172]:42116 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896604AbgDOKqM (ORCPT ); Wed, 15 Apr 2020 06:46:12 -0400 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 716E81063; Wed, 15 Apr 2020 03:46:11 -0700 (PDT) Received: from [10.37.12.1] (unknown [10.37.12.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6C5C73F68F; Wed, 15 Apr 2020 03:46:09 -0700 (PDT) Subject: Re: [PATCH 7/8] arm64: cpufeature: Relax checks for AArch32 support at EL[0-2] To: will@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, mark.rutland@arm.com, maz@kernel.org, anshuman.khandual@arm.com, catalin.marinas@arm.com, saiprakash.ranjan@codeaurora.org, dianders@chromium.org, kernel-team@android.com References: <20200414213114.2378-1-will@kernel.org> <20200414213114.2378-8-will@kernel.org> From: Suzuki K Poulose Message-ID: <714f124c-7eb7-b750-e98c-63da64ddae75@arm.com> Date: Wed, 15 Apr 2020 11:50:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20200414213114.2378-8-will@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/14/2020 10:31 PM, Will Deacon wrote: > We don't need to be quite as strict about mismatched AArch32 support, > which is good because the friendly hardware folks have been busy > mismatching this to their hearts' content. > > * We don't care about EL2 or EL3 (there are silly comments concerning > the latter, so remove those) > > * EL1 support is gated by the ARM64_HAS_32BIT_EL1 capability and handled > gracefully when a mismatch occurs > > * EL1 support is gated by the ARM64_HAS_32BIT_EL0 capability and handled s/EL1/EL0 > gracefully when a mismatch occurs > > Relax the AArch32 checks to FTR_NONSTRICT. Agreed. We should do something similar for the features exposed by the ELF_HWCAP, of course in a separate series. > > Signed-off-by: Will Deacon Reviewed-by: Suzuki K Poulose 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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 822A6C3815B for ; Wed, 15 Apr 2020 10:46:16 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 152C620737 for ; Wed, 15 Apr 2020 10:46:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 152C620737 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 9EBDF4B1FB; Wed, 15 Apr 2020 06:46:15 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pBK4+yDbouMg; Wed, 15 Apr 2020 06:46:14 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7E6E14B1CC; Wed, 15 Apr 2020 06:46:14 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 486684B1BD for ; Wed, 15 Apr 2020 06:46:13 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4pleQ2D+JO2b for ; Wed, 15 Apr 2020 06:46:12 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 237254B1B9 for ; Wed, 15 Apr 2020 06:46:12 -0400 (EDT) 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 716E81063; Wed, 15 Apr 2020 03:46:11 -0700 (PDT) Received: from [10.37.12.1] (unknown [10.37.12.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6C5C73F68F; Wed, 15 Apr 2020 03:46:09 -0700 (PDT) Subject: Re: [PATCH 7/8] arm64: cpufeature: Relax checks for AArch32 support at EL[0-2] To: will@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu References: <20200414213114.2378-1-will@kernel.org> <20200414213114.2378-8-will@kernel.org> From: Suzuki K Poulose Message-ID: <714f124c-7eb7-b750-e98c-63da64ddae75@arm.com> Date: Wed, 15 Apr 2020 11:50:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20200414213114.2378-8-will@kernel.org> Content-Language: en-US Cc: saiprakash.ranjan@codeaurora.org, anshuman.khandual@arm.com, maz@kernel.org, linux-kernel@vger.kernel.org, dianders@chromium.org, catalin.marinas@arm.com, kernel-team@android.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 04/14/2020 10:31 PM, Will Deacon wrote: > We don't need to be quite as strict about mismatched AArch32 support, > which is good because the friendly hardware folks have been busy > mismatching this to their hearts' content. > > * We don't care about EL2 or EL3 (there are silly comments concerning > the latter, so remove those) > > * EL1 support is gated by the ARM64_HAS_32BIT_EL1 capability and handled > gracefully when a mismatch occurs > > * EL1 support is gated by the ARM64_HAS_32BIT_EL0 capability and handled s/EL1/EL0 > gracefully when a mismatch occurs > > Relax the AArch32 checks to FTR_NONSTRICT. Agreed. We should do something similar for the features exposed by the ELF_HWCAP, of course in a separate series. > > Signed-off-by: Will Deacon Reviewed-by: Suzuki K Poulose _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D6C3C2BA19 for ; Wed, 15 Apr 2020 10:46:16 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1D4B920787 for ; Wed, 15 Apr 2020 10:46:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OpAEu9de" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D4B920787 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AULIsBCt90EFUyiVWHazGR0yVBiWjl6edEc4VHLBMOs=; b=OpAEu9de+jW7qEyhNqx/YW7JS /AY4BTL1eu1fK8Qfqi+Wo41KYz7QzGfjLBc9WebMIhfsHLCsAJfVKQgdyjJCKWCJv7u+AfC3SJckR 6TrYbTUN47XfiNF63hLwd4Wr2/gOFEuPAwrF3jtNOgNFJ3HMIDm4GgAjgpo17WXvTpN8qExQ34VvG y+BrW83ODqAytbF8ZVkysndvdcicfl/5SnWLzFPciS4YD/o/CubLkuPkypt3t2RfoaYF3Hbr9CPkd WHgek5eP/J+nVN6cRpmyUMBrxC+jobZycmt/a3FqMJ0jFw5GYorbtJ1i1wlPtaiy6UsCb9hUPOJVm Se8gd4sxw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOfYd-00045S-Iv; Wed, 15 Apr 2020 10:46:15 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOfYa-000454-C6 for linux-arm-kernel@lists.infradead.org; Wed, 15 Apr 2020 10:46:13 +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 716E81063; Wed, 15 Apr 2020 03:46:11 -0700 (PDT) Received: from [10.37.12.1] (unknown [10.37.12.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6C5C73F68F; Wed, 15 Apr 2020 03:46:09 -0700 (PDT) Subject: Re: [PATCH 7/8] arm64: cpufeature: Relax checks for AArch32 support at EL[0-2] To: will@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu References: <20200414213114.2378-1-will@kernel.org> <20200414213114.2378-8-will@kernel.org> From: Suzuki K Poulose Message-ID: <714f124c-7eb7-b750-e98c-63da64ddae75@arm.com> Date: Wed, 15 Apr 2020 11:50:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20200414213114.2378-8-will@kernel.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200415_034612_455662_1699B526 X-CRM114-Status: GOOD ( 14.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, saiprakash.ranjan@codeaurora.org, anshuman.khandual@arm.com, maz@kernel.org, linux-kernel@vger.kernel.org, dianders@chromium.org, catalin.marinas@arm.com, kernel-team@android.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 04/14/2020 10:31 PM, Will Deacon wrote: > We don't need to be quite as strict about mismatched AArch32 support, > which is good because the friendly hardware folks have been busy > mismatching this to their hearts' content. > > * We don't care about EL2 or EL3 (there are silly comments concerning > the latter, so remove those) > > * EL1 support is gated by the ARM64_HAS_32BIT_EL1 capability and handled > gracefully when a mismatch occurs > > * EL1 support is gated by the ARM64_HAS_32BIT_EL0 capability and handled s/EL1/EL0 > gracefully when a mismatch occurs > > Relax the AArch32 checks to FTR_NONSTRICT. Agreed. We should do something similar for the features exposed by the ELF_HWCAP, of course in a separate series. > > Signed-off-by: Will Deacon Reviewed-by: Suzuki K Poulose _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel