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 7A898C2BA19 for ; Wed, 15 Apr 2020 10:38:54 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 0CDD020857 for ; Wed, 15 Apr 2020 10:38:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0CDD020857 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 5F18E4B1D9; Wed, 15 Apr 2020 06:38:53 -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 gfmPrFSPb5F3; Wed, 15 Apr 2020 06:38:52 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 462274B123; Wed, 15 Apr 2020 06:38:52 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 5B1CF4B123 for ; Wed, 15 Apr 2020 06:38:50 -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 tTn+kKVX1m9C for ; Wed, 15 Apr 2020 06:38:49 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 56BF04B113 for ; Wed, 15 Apr 2020 06:38:49 -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 E636A1063; Wed, 15 Apr 2020 03:38:48 -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 C788E3F68F; Wed, 15 Apr 2020 03:38:46 -0700 (PDT) Subject: Re: [PATCH 6/8] arm64: cpufeature: Relax AArch32 system checks if EL1 is 64-bit only To: will@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu References: <20200414213114.2378-1-will@kernel.org> <20200414213114.2378-7-will@kernel.org> From: Suzuki K Poulose Message-ID: Date: Wed, 15 Apr 2020 11:43:36 +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: <20200414213114.2378-7-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: > If AArch32 is not supported at EL1, the AArch32 feature register fields > no longer advertise support for some system features: > > * ISAR4.SMC > * PFR1.{Virt_frac, Sec_frac, Virtualization, Security, ProgMod} > > In which case, we don't need to emit "SANITY CHECK" failures for all of > them. > > Add logic to relax the strictness of individual feature register fields > at runtime and use this for the fields above if 32-bit EL1 is not > supported. > > 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