From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FA7543144; Thu, 13 Jun 2024 08:42:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718268136; cv=none; b=nuU0oXaSJzxnwC62DrfZoPCSa1VHvwQToI+7Aj/B9Gc+HiwKL9TwXy9RFJc44PdvIT1VCbAoom13jV4CJX5ZhPq++Lj9FplUxP5aaGw7Ce/+kaILO23CbZ0JxRZePHk10o9moSyc5KY6F4xw9xrKhVEvTLVtRL+dgdxlvW6gxBQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718268136; c=relaxed/simple; bh=4DwpPwkA6d/p4ccA/BSLWy4Hrj0gghbBTVqHDH0Z++Q=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=Wg0gu7hN0JAJlPfGBhyXM5l6Bur5zQjSJXltYs8lAt4pkzJKUbx0S+RjM4mSAuAsnjgo7SJ6HrZjNKpjj56FBR468Xdwc27aTQqEE7WYUM14LXIrML0nbIBiKrx6JXj1Ovj+yH0PkPmN/GyanZrDXWdqZ0dC0Rpt87P4rBuiG94= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GsEmIpuS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GsEmIpuS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 078A6C2BBFC; Thu, 13 Jun 2024 08:42:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718268136; bh=4DwpPwkA6d/p4ccA/BSLWy4Hrj0gghbBTVqHDH0Z++Q=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=GsEmIpuSpzvHxJjmq/ZuB0OjgbYPlf+U7Auma22lPgAsd1ViTHQZIa3XYkeUqURrM f2LnudOXXDNv15BFUFdWeXjgxjptS7NWx0lP5MslfZ1WxK+KBpJ1SoKovz1EiP0QSe 4FbcVEsd+CQCaoKjx1CuneKkQJ/xrpeDh/5JEgxwac2T2srqM+RqGP8X1693Sp41Z+ 1phlJf5D/vj2EU8DFCSSthmofK+r9Q8aEw8Ggy+o8apNcovNvBNi7r17+EQ4EwQTNI Ez+YB2pwNDIpAaQSwczIZLkk4jWD+/pyblk2Wa3ZIOkIqi9oHA1jorvObl3f3dUdOv Vtp/IMZfd4LPA== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1sHg29-003Tbn-Hm; Thu, 13 Jun 2024 09:42:13 +0100 Date: Thu, 13 Jun 2024 09:42:13 +0100 Message-ID: <86zfrpjkt6.wl-maz@kernel.org> From: Marc Zyngier To: Shaoqin Huang Cc: Oliver Upton , kvmarm@lists.linux.dev, Eric Auger , Sebastian Ott , Cornelia Huck , Catalin Marinas , James Morse , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Suzuki K Poulose , Will Deacon , Zenghui Yu Subject: Re: [RFC PATCH v1 0/2] KVM: arm64: Making BT Field in ID_AA64PFR1_EL1 writable In-Reply-To: <7f1ca739-42f5-4e3a-a0c9-b1eac4522a97@redhat.com> References: <20240612023553.127813-1-shahuang@redhat.com> <8634pilbja.wl-maz@kernel.org> <7f1ca739-42f5-4e3a-a0c9-b1eac4522a97@redhat.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.2 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: shahuang@redhat.com, oliver.upton@linux.dev, kvmarm@lists.linux.dev, eauger@redhat.com, sebott@redhat.com, cohuck@redhat.com, catalin.marinas@arm.com, james.morse@arm.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, pbonzini@redhat.com, shuah@kernel.org, suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Thu, 13 Jun 2024 09:31:45 +0100, Shaoqin Huang wrote: > > If we don't care about the FEAT_CNTSC right now. Could I fix the > compile issue and respin this again without the background of enabling > migration between MtCollins and AmpereOne, and just keep the > information of the different BT field between different machine? As I said, I think this patch is valuable. But maybe you should consider tackling the full register, rather than only addressing a single field. Thanks, M. -- Without deviation from the norm, progress is not possible.