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Received: from BL0PR2101MB1092.namprd21.prod.outlook.com (2603:10b6:207:30::23) by DM4PR21MB3153.namprd21.prod.outlook.com (2603:10b6:8:65::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5880.8; Mon, 28 Nov 2022 01:29:17 +0000 Received: from BL0PR2101MB1092.namprd21.prod.outlook.com ([fe80::ae03:5b1e:755c:a020]) by BL0PR2101MB1092.namprd21.prod.outlook.com ([fe80::ae03:5b1e:755c:a020%6]) with mapi id 15.20.5880.008; Mon, 28 Nov 2022 01:29:16 +0000 From: Dexuan Cui To: dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, brijesh.singh@amd.com Cc: linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, Dexuan Cui Subject: [PATCH] x86/sev: mem_encrypt_free_decrypted_mem(): encrypt the pages for AMD SME only Date: Sun, 27 Nov 2022 17:28:52 -0800 Message-Id: <20221128012852.8561-1-decui@microsoft.com> X-Mailer: git-send-email 2.17.1 X-ClientProxiedBy: MW4PR03CA0177.namprd03.prod.outlook.com (2603:10b6:303:8d::32) To BL0PR2101MB1092.namprd21.prod.outlook.com (2603:10b6:207:30::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL0PR2101MB1092:EE_|DM4PR21MB3153:EE_ X-MS-Office365-Filtering-Correlation-Id: 04a3e645-e7d6-4b37-0885-08dad0dff652 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Fixes: b3f0907c71e0 ("x86/mm: Add .bss..decrypted section to hold shared variables") Signed-off-by: Dexuan Cui --- arch/x86/mm/mem_encrypt_amd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index 9c4d8dbcb129..fd9b58402a22 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -516,7 +516,7 @@ void __init mem_encrypt_free_decrypted_mem(void) * The unused memory range was mapped decrypted, change the encryption * attribute from decrypted to encrypted before freeing it. */ - if (cc_platform_has(CC_ATTR_MEM_ENCRYPT)) { + if (sme_me_mask && cc_platform_has(CC_ATTR_MEM_ENCRYPT)) { r = set_memory_encrypted(vaddr, npages); if (r) { pr_warn("failed to free unused decrypted pages\n");