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 4FDECE95A8E for ; Tue, 30 Dec 2025 20:11:02 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vag2o-0007Wx-GX; Tue, 30 Dec 2025 15:10:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vag2X-0007W5-IM for qemu-devel@nongnu.org; Tue, 30 Dec 2025 15:09:57 -0500 Received: from sea.source.kernel.org ([172.234.252.31]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vag2W-0001uL-7m for qemu-devel@nongnu.org; Tue, 30 Dec 2025 15:09:57 -0500 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id A2ACD406FF; Tue, 30 Dec 2025 20:09:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB6A9C4CEFB; Tue, 30 Dec 2025 20:09:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767125386; bh=aqrOF7X5C4o8/+26DTyO9tGelKslMskHPwbK+xdniko=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=eg+ZR+BlE8aJZJxJY6YP/5A8qtLiTWPieqO/5Rw0RfZA4rLvbs91JhzbydEWP88+H 7oZ/kG9cxHbizi1OA3AT/OiNVCNMP0TGrbcCA3zTGRJTMcw47mZyZuFm0Z3tiXxT5F s/CpdQNd244rOWBpvzU4x8twLRbgAlX8DhrCqcMPLSK9M3cX9t1w1ICMvuQqR0wRz8 aLnduYWc3cZX6/g25wutVSgJj98EUdiqb/23s+3FkZd4YRauRQ2njngPp3jWG5u+9D SDvMBynGGRSh8iT97wcEItykf0IWzO2QSuaeVj6YzFk1WvTevctD5CAREGEHIW3jhX MeOnMfGZL3amw== Message-ID: <9713eeae-65fb-4b6e-b5c8-5ffc2c5b4044@kernel.org> Date: Tue, 30 Dec 2025 21:09:41 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/1] numa: add 'spm' option for Specific Purpose Memory To: "Huang, FangSheng (Jerry)" , Jonathan Cameron Cc: qemu-devel@nongnu.org, imammedo@redhat.com, Zhigang.Luo@amd.com, Lianjie.Shi@amd.com, Alistair Popple , "Bhardwaj, Rajneesh" , Paul Blinzer , dan.j.williams@intel.com References: <20251209093841.2250527-1-FangSheng.Huang@amd.com> <20251209093841.2250527-2-FangSheng.Huang@amd.com> <20251223095605.0000065d@huawei.com> <586a3535-ffa1-4d13-8bb5-c1b922a90a43@kernel.org> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=172.234.252.31; envelope-from=david@kernel.org; helo=sea.source.kernel.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org >> >> Just curious, it's the same on real hardware, right? >> > > Hi David, could you clarify what you're asking about? Whether the SPM > semantics are the same, or whether this QEMU implementation matches real > hardware behavior? Yes exactly. If it matches real hardware behavior then there are no real surprises exposed by the QEMU implementation. -- Cheers David