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 64B8D1EB3E; Mon, 24 Feb 2025 08:27:00 +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=1740385620; cv=none; b=YO4+6TxdBoRkp2MgjhqG7Z1pFWh+da7d06lLdq4GBS8h4PSMNERwwUTYoc3XuROwgrrLmV/lihtIU01MWyHvzlLOY6WEj9muDAdLUi0018+6uKo/mCZ2CxlwV+pOd4eq4DgM6hzdjAyT9sysYcaA5iGfu5iDI0Duny5b7CzgtfQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740385620; c=relaxed/simple; bh=OuRNqQ6wDDAyRDLxgbM213abZ0DdibCo9ddlkyNF6Kc=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=F4q3Y31/vOjFA//V7A3GQGw3bxBbBKMpyutS5UPWVcLdgg7VBA6qYOkJskSrjqyk+oWS6S/vvxMC2RqHakHFcYKvPzOvlPU24rjNV2bAhK1AaDgnJVl/3LB/C4o82A2Zx2gY579x29h0RsNiwRDXaDFZVZ5VRC041t30K+DAOCI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=D8Hwe7k5; 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="D8Hwe7k5" 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) Precedence: bulk X-Mailing-List: kvm@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: 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 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.