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Message-ID: <40042c40-a2ba-e491-d16a-4bacbfc6154e@suse.com> Date: Tue, 26 Jul 2022 18:06:44 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: [PATCH 7/8] x86/mm: adjust type check around _get_page_type()'s TLB flush Content-Language: en-US From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Wei Liu , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , George Dunlap , Tim Deegan References: <3fdfad2a-7891-0b08-5541-3b226e0555e1@suse.com> In-Reply-To: <3fdfad2a-7891-0b08-5541-3b226e0555e1@suse.com> X-ClientProxiedBy: FR0P281CA0095.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:a9::12) To AM6PR04MB6551.eurprd04.prod.outlook.com (2603:10a6:20b:fa::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1cdd2baa-d08a-48b0-fd75-08da6f20d7e1 X-MS-TrafficTypeDiagnostic: DBBPR04MB7772:EE_ 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:AM6PR04MB6551.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(396003)(39860400002)(346002)(366004)(136003)(376002)(41300700001)(186003)(6666004)(2906002)(6506007)(6512007)(26005)(5660300002)(86362001)(4744005)(6486002)(31696002)(478600001)(2616005)(8936002)(6916009)(31686004)(36756003)(316002)(54906003)(38100700002)(66946007)(66556008)(4326008)(8676002)(66476007)(45980500001)(43740500002);DIR:OUT;SFP:1101; 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Signed-off-by: Jan Beulich --- a/xen/arch/x86/mm.c +++ b/xen/arch/x86/mm.c @@ -3020,7 +3020,7 @@ static int _get_page_type(struct page_in if ( d && shadow_mode_enabled(d) ) shadow_prepare_page_type_change(d, page); - if ( (x & PGT_type_mask) != type ) + if ( (x ^ type) & PGT_type_mask ) { /* * On type change we check to flush stale TLB entries. It is