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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 640D5C2BB55 for ; Thu, 16 Apr 2020 11:46:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40C7021D95 for ; Thu, 16 Apr 2020 11:46:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="pBNYSv1o" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2506623AbgDPLqu (ORCPT ); Thu, 16 Apr 2020 07:46:50 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:38255 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2504857AbgDPK0k (ORCPT ); Thu, 16 Apr 2020 06:26:40 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587032793; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=7e7yje6Jk92q2KWOzUZdbFCXe9Taa4CbqlpJEFe/hWg=; b=pBNYSv1opwwNWkriETMzldswAcDR1LsnGCkke6wQRxF6NYHI/9SP6hTK2Lz64Z7qeJ1dba8y EzaAVRgt5Nn03C11y7H7oXOZ1AwNmRhRvq9jKPC0J+Qs6o5M07JapcAkmDJk07qkH4C2NRZS 0rFMY0PzVY3vR71l9ZITBj3yVLs= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9832d6.7ff68f8d8490-smtp-out-n02; Thu, 16 Apr 2020 10:26:30 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 41C33C44788; Thu, 16 Apr 2020 10:26:29 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: saiprakash.ranjan) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9BE44C433F2; Thu, 16 Apr 2020 10:26:28 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 16 Apr 2020 15:56:28 +0530 From: Sai Prakash Ranjan To: Will Deacon Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Mark Rutland , kernel-team@android.com, Anshuman Khandual , Marc Zyngier , Suzuki K Poulose , linux-kernel@vger.kernel.org, Doug Anderson , Catalin Marinas Subject: Re: [PATCH 0/8] Relax sanity checking for mismatched AArch32 EL1 In-Reply-To: References: <20200414213114.2378-1-will@kernel.org> Message-ID: X-Sender: saiprakash.ranjan@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-04-16 14:09, Sai Prakash Ranjan wrote: > On 2020-04-15 03:01, Will Deacon wrote: >> Hi all, >> >> For better or worse, there are SoCs in production where some, but not >> all of the CPUs, support AArch32 at EL1 and above. Right now, that >> results in "SANITY CHECK" warnings during boot and an unconditional >> kernel taint. >> >> This patch series tries to do a bit better: the only time we care >> about >> AArch32 at EL1 is for KVM, so rather than throw our toys out of the >> pram, we can instead just disable support for 32-bit guests on these >> systems. In the unlikely scenario of a late CPU hotplug being the >> first >> time we notice that AArch32 is not available, then we fail the hotplug >> (right now we let the thing come online, which leads to hilarious >> results for any pre-existing 32-bit guests). >> >> Feedback welcome, >> >> Will >> > > Thanks Will, tested this series on QCOM SC7180 and SM8150 SoCs. > > For the entire series, > > Tested-by: saiprakash.ranjan@codeaurora.org > Urgh sorry, it should be Tested-by: Sai Prakash Ranjan -Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation