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Message-ID: Date: Tue, 4 Oct 2022 10:06:36 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 Subject: Re: [PATCH][4.17] EFI: don't convert memory marked for runtime use to ordinary RAM Content-Language: en-US To: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Cc: "xen-devel@lists.xenproject.org" , Andrew Cooper , Wei Liu , Julien Grall , Stefano Stabellini , Volodymyr Babchuk , Bertrand Marquis , Henry Wang References: From: Jan Beulich In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: AS8PR04CA0187.eurprd04.prod.outlook.com (2603:10a6:20b:2f3::12) To VE1PR04MB6560.eurprd04.prod.outlook.com (2603:10a6:803:122::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: VE1PR04MB6560:EE_|DB9PR04MB9626:EE_ X-MS-Office365-Filtering-Correlation-Id: 81b5575a-85f3-4ce8-544c-08daa5df5b04 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VE1PR04MB6560.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230022)(376002)(366004)(346002)(39860400002)(396003)(136003)(451199015)(38100700002)(66556008)(83380400001)(6512007)(26005)(4326008)(316002)(54906003)(36756003)(2616005)(2906002)(31696002)(6916009)(5660300002)(186003)(4744005)(66476007)(66946007)(8676002)(41300700001)(86362001)(31686004)(6486002)(478600001)(8936002)(6506007)(53546011)(45980500001)(43740500002);DIR:OUT;SFP:1101; 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To avoid accessing memory at >> runtime which was re-used for other purposes, make >> efi_arch_process_memory_map() follow suit. While on x86 in theory the >> same would apply to EfiACPIReclaimMemory, we don't actually "reclaim" >> E820_ACPI memory there and hence that type's handling can be left alone. > > What about dom0? Should it be translated to E820_RESERVED so that > dom0 doesn't try to use it either? I'm afraid I don't understand the questions. Not the least because I think "it" can't really mean "dom0" from the earlier sentence. Jan > I guess using E820_RESERVED > could also confuse dom0 about ACPI data placement. > > Thanks, Roger.