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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40B3CC88CB4 for ; Mon, 12 Jun 2023 15:34:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236559AbjFLPeH (ORCPT ); Mon, 12 Jun 2023 11:34:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234742AbjFLPeG (ORCPT ); Mon, 12 Jun 2023 11:34:06 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 191AB10C4; Mon, 12 Jun 2023 08:34:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686584046; x=1718120046; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=aLoW+RYLTRsrvR/PqFvoPQqxIv0H+SWrGX2+1z5WjgE=; b=NTTDv1t92cXWMb2TiPJPz0H+53E+HP53JI2x0EHBWsuGL8Xmo7l1wmgJ LBWkg1VQUcMQWSaPORFEq2pzm8vyuNrWc+Nk/AoeFEWWia0sCRlLkA9gS h8kd+mNFRyHAGqb9nIULbZT28vwGcaUo/IB1NpWUkcmf9weLE9JbPlEEK BBU57gq4ywjHKjqjHrOO810TpxSqcugcNXPq72M8EtUfXWSV44N4SPFWQ 6JcdrpenBYf5llq5ONpPU+ZBKgvRvkNkiQkVzzbdf+xRPUZmGgjgvFyv+ RxEaSG829HkL4nAbFGxy6F1+EsKiqjz157X3Hl41HC7bExsU/DLwaNAwF g==; X-IronPort-AV: E=McAfee;i="6600,9927,10739"; a="358073199" X-IronPort-AV: E=Sophos;i="6.00,236,1681196400"; d="scan'208";a="358073199" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jun 2023 08:34:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10739"; a="801061441" X-IronPort-AV: E=Sophos;i="6.00,236,1681196400"; d="scan'208";a="801061441" Received: from spmantha-mobl1.amr.corp.intel.com (HELO [10.209.43.2]) ([10.209.43.2]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jun 2023 08:34:02 -0700 Message-ID: <12f95b38-427c-6810-373a-ba2062c43882@intel.com> Date: Mon, 12 Jun 2023 08:34:02 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH RFC v9 07/51] x86/sev: Add the host SEV-SNP initialization support Content-Language: en-US To: Michael Roth , kvm@vger.kernel.org Cc: linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-crypto@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, jroedel@suse.de, thomas.lendacky@amd.com, hpa@zytor.com, ardb@kernel.org, pbonzini@redhat.com, seanjc@google.com, vkuznets@redhat.com, jmattson@google.com, luto@kernel.org, dave.hansen@linux.intel.com, slp@redhat.com, pgonda@google.com, peterz@infradead.org, srinivas.pandruvada@linux.intel.com, rientjes@google.com, dovmurik@linux.ibm.com, tobin@ibm.com, bp@alien8.de, vbabka@suse.cz, kirill@shutemov.name, ak@linux.intel.com, tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com, alpergun@google.com, dgilbert@redhat.com, jarkko@kernel.org, ashish.kalra@amd.com, nikunj.dadhania@amd.com, liam.merwick@oracle.com, zhi.a.wang@intel.com, Brijesh Singh References: <20230612042559.375660-1-michael.roth@amd.com> <20230612042559.375660-8-michael.roth@amd.com> From: Dave Hansen In-Reply-To: <20230612042559.375660-8-michael.roth@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 6/11/23 21:25, Michael Roth wrote: > + /* > + * Calculate the amount the memory that must be reserved by the BIOS to > + * address the whole RAM, including the bookkeeping area. The RMP itself > + * must also be covered. > + */ > + max_rmp_pfn = max_pfn; > + if (PHYS_PFN(rmp_end) > max_pfn) > + max_rmp_pfn = PHYS_PFN(rmp_end); Could you say a little here about how this deals with memory hotplug?