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 9394DC021B3 for ; Mon, 24 Feb 2025 08:44:26 +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-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=i2F3/IzCLsFcujhdIsgsK94aBeCPjXv6h+MkPjGo6dA=; b=NAvN9zAAJ1xKbnBrRrkUBSfw6k GbKWPqW8Qqqdk+tADqUC9NWlvgDMYwPih76+F7DNuGzShlHetDf6lxSgbV0D7JTlROvLWeB+cW4+t F7OkhdiD9IZPFrpRJ7X6rE+hb3xku/3y/3wOdtU2AnMDPnlBTLYxukzr7DurJQojV59jECEckhtLD uMhxvwIyzg7yrH7EkvSYOny7bEL75jEhFwTyqTl1mNnYpo1iggcvz53ykcYdUkTfXA5wVTpEoA6EQ 8j98sQwa++Bcwyf6bAL8Sv3Lb0da25sK/uIsxPUG4lep2UUVtchsa+pJslHIoIgMdNVsu0fANNamR L1bpB/+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tmU4Y-0000000CkW8-2c5R; Mon, 24 Feb 2025 08:44:18 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tmTnp-0000000Cgnx-19Hn for linux-arm-kernel@lists.infradead.org; Mon, 24 Feb 2025 08:27:02 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 509985C55FD; Mon, 24 Feb 2025 08:26:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E8E53C4CED6; Mon, 24 Feb 2025 08:26:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740385619; bh=OuRNqQ6wDDAyRDLxgbM213abZ0DdibCo9ddlkyNF6Kc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=D8Hwe7k5QYtZH5AzNs5PaEsGQqjMB8fLopNbsE1X/fvU/U70GuqfPLn8KepzO/iJG t+2GzaXpm2xPCcvhAlmYTHZ1d2fmqz6Y9iM43Ms2BpycnE9QK4BS+M2PRs06AjCKfn +uBR35bNTsLJ+iBMmMUJrayY3laIGpG/2xyszsNBJjhKWITvA3vX79pIHQ6r0BGne6 IaBQSHLmHnGyOqc8VnASkarCxAhPMpwBSS0zjnK0v08R+ExLynmJ2zojUTYlRynDFX KSikuyH2a5DuT+10Oiyf53P7BjcZhlKdUUmCK7Gmki/0PaGanOR5GbOY11adkqQIOQ qsAzjQfnQXeNw== 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 1tmTnl-007ECC-IK; Mon, 24 Feb 2025 08:26:57 +0000 Date: Mon, 24 Feb 2025 08:26:57 +0000 Message-ID: <86o6yrrbn2.wl-maz@kernel.org> From: Marc Zyngier To: Aneesh Kumar K.V Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Eric Auger Subject: Re: [PATCH 01/14] arm64: cpufeature: Handle NV_frac as a synonym of NV2 In-Reply-To: References: <20250215173816.3767330-1-maz@kernel.org> <20250215173816.3767330-2-maz@kernel.org> 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/29.4 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) 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: aneesh.kumar@kernel.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, eric.auger@redhat.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250224_002701_355867_765B4F19 X-CRM114-Status: GOOD ( 13.10 ) 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 Mon, 24 Feb 2025 07:41:18 +0000, Aneesh Kumar K.V wrote: > > Marc Zyngier writes: > > > With ARMv9.5, an implementation supporting Nested Virtualization > > is allowed to only support NV2, and to avoid supporting the old > > (and useless) ARMv8.3 variant. > > > > This is indicated by ID_AA64MMFR2_EL1.NV being 0 (as if NV wasn't > > implemented) and ID_AA64MMDR4_EL1.NV_frac being 1 (indicating that > ^ F > The register name is wrong there. Already reported by Joey on v2 of this series. Thanks, M. -- Without deviation from the norm, progress is not possible.