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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 F1907C433F5 for ; Mon, 10 Jan 2022 16:17:49 +0000 (UTC) Received: from localhost ([::1]:59980 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n6xMi-00077t-Sc for qemu-devel@archiver.kernel.org; Mon, 10 Jan 2022 11:17:48 -0500 Received: from eggs.gnu.org ([209.51.188.92]:50896) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6x7d-0008RF-MA for qemu-devel@nongnu.org; Mon, 10 Jan 2022 11:02:13 -0500 Received: from [2604:1380:4641:c500::1] (port=44900 helo=dfw.source.kernel.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6x7Z-0005Me-SU for qemu-devel@nongnu.org; Mon, 10 Jan 2022 11:02:13 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7798660B9F; Mon, 10 Jan 2022 16:02:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E0242C36AE3; Mon, 10 Jan 2022 16:02:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1641830526; bh=fuz9oNXrm2Hf4a0RANGkIs6aiYecMqw64RGc7bXvONI=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=BNQ0DoNDVNdrSom+IIrIk4Bg6r7+4jYAMpYsNI1zKIUEBoikgoBEdBSRPQYj1M4E/ 3dZYRiKGrcy6pHcO6c3e68yw1Ke4ZIjXfj3GE8WDwlj2k6TjULEnDQYUiw3DU62cZO jtI4Smf0z/smYwPI6l4MqPsCwOxK0dNXEwWtsBA/Xg2T2QRfLKndwjMPYF6DipUJGU BX8//LBkz6EF6LiSK4FQyBVz5/DbLq5EFFGoGiwFSK/S5a2h+QkeGiEkccoP8rpRX3 yYzf2HLLbxABY4QgYglgBH0lOW0uShMOvJk6+w9KHcTl0tAshbCL5v55Iv27vIkD8F YgaHoOyvlYjRA== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n6x7U-00HAlH-VM; Mon, 10 Jan 2022 16:02:05 +0000 Date: Mon, 10 Jan 2022 16:02:04 +0000 Message-ID: <87h7abtw8z.wl-maz@kernel.org> From: Marc Zyngier To: Peter Maydell Subject: Re: [PATCH v4 2/6] hw/arm/virt: Add a control for the the highmem redistributors In-Reply-To: References: <20220107163324.2491209-1-maz@kernel.org> <20220107163324.2491209-3-maz@kernel.org> <448274ac-2650-7c09-742d-584109fb5c56@redhat.com> <87k0f7tx17.wl-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/27.1 (x86_64-pc-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: peter.maydell@linaro.org, eric.auger@redhat.com, qemu-devel@nongnu.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, kernel-team@android.com, drjones@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-Host-Lookup-Failed: Reverse DNS lookup failed for 2604:1380:4641:c500::1 (failed) Received-SPF: pass client-ip=2604:1380:4641:c500::1; envelope-from=maz@kernel.org; helo=dfw.source.kernel.org X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.597, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Jones , kvm@vger.kernel.org, qemu-devel@nongnu.org, eric.auger@redhat.com, kernel-team@android.com, kvmarm@lists.cs.columbia.edu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, 10 Jan 2022 15:47:47 +0000, Peter Maydell wrote: > > On Mon, 10 Jan 2022 at 15:45, Marc Zyngier wrote: > > $ /home/maz/vminstall/qemu-hack -m 1G -smp 256 -cpu host -machine virt,accel=kvm,gic-version=3,highmem=on -nographic -drive if=pflash,format=raw,readonly=on,file=/usr/share/AAVMF/AAVMF_CODE.fd > > qemu-hack: warning: Number of SMP cpus requested (256) exceeds the recommended cpus supported by KVM (8) > > qemu-hack: warning: Number of hotpluggable cpus requested (256) exceeds the recommended cpus supported by KVM (8) > > qemu-hack: Capacity of the redist regions(123) is less than number of vcpus(256) > > Side question: why is KVM_CAP_NR_VCPUS returning 8 for > "recommended cpus supported by KVM" ? Is something still > assuming GICv2 CPU limits? No, it is only that KVM_CAP_NR_VCPUS is defined as returning the number of physical CPUs (and this test machine has only 8 of them). M. -- Without deviation from the norm, progress is not possible.