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b=OGvKe9LYmIKjbz62uV1gqg8VMECVugAgiQmR1aY6kOu2Y41xbt5okerUCRn+H49jg04MdCCKcUjg2FcMrkZg8Qk7CINx9mW0DqGkalDS5cojJaPVF+G2qHE20tNEBv2eaU/ndQxcBa98SYjXPoLmbNDcP/SORI9D/QvQ4VJZnSY= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=microsoft.com; Received: from DM6PR21MB1370.namprd21.prod.outlook.com (2603:10b6:5:16b::28) by BL0PR2101MB1313.namprd21.prod.outlook.com (2603:10b6:208:92::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.18; Thu, 9 Mar 2023 02:41:45 +0000 Received: from DM6PR21MB1370.namprd21.prod.outlook.com ([fe80::caf1:81fb:4297:bf17]) by DM6PR21MB1370.namprd21.prod.outlook.com ([fe80::caf1:81fb:4297:bf17%5]) with mapi id 15.20.6178.016; Thu, 9 Mar 2023 02:41:45 +0000 From: Michael Kelley To: hpa@zytor.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, luto@kernel.org, peterz@infradead.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, lpieralisi@kernel.org, robh@kernel.org, kw@linux.com, bhelgaas@google.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, Tianyu.Lan@microsoft.com, kirill.shutemov@linux.intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, ak@linux.intel.com, isaku.yamahata@intel.com, dan.j.williams@intel.com, jane.chu@oracle.com, seanjc@google.com, tony.luck@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-arch@vger.kernel.org, iommu@lists.linux.dev Cc: mikelley@microsoft.com Subject: [PATCH v6 05/13] init: Call mem_encrypt_init() after Hyper-V hypercall init is done Date: Wed, 8 Mar 2023 18:40:06 -0800 Message-Id: <1678329614-3482-6-git-send-email-mikelley@microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1678329614-3482-1-git-send-email-mikelley@microsoft.com> References: <1678329614-3482-1-git-send-email-mikelley@microsoft.com> Content-Type: text/plain X-ClientProxiedBy: MW4P221CA0008.NAMP221.PROD.OUTLOOK.COM (2603:10b6:303:8b::13) To DM6PR21MB1370.namprd21.prod.outlook.com (2603:10b6:5:16b::28) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR21MB1370:EE_|BL0PR2101MB1313:EE_ X-MS-Office365-Filtering-Correlation-Id: 17f78769-4eba-486b-03fa-08db2047d24f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?dubR/IDeoAP+fNAFJtYzlsmzQBqsJORjXplEXP+SLgpLdyOKkF4GfNS6S2ZE?= =?us-ascii?Q?DJj83Qv6Zf51L2ZjVRZN8HusTgxbQqp6N9HR7qWIJpj+lY5cyZcP1oaWe1oO?= =?us-ascii?Q?kAyhrCSZJC6I6peePqt05E6q+5zH9fTfAZHr3b4FYSCPcuJTtJI5lANRCvci?= =?us-ascii?Q?IV852IVVeGrddefNyCuCHyPhR25nXVgdvdncfDae9ksCVQ0z7AHbZkGmQPc8?= =?us-ascii?Q?71VnXy13iEXLKhpplyVcLXmWZVBb0IIoBxSsL2MnG3PcGUDwejTSXSkh3wkY?= =?us-ascii?Q?UxMTGnpYkUvw6hBqZNxwvLRWqZJJThlZp7643iwDRQxV7hxZZ/J616n9ZV7U?= =?us-ascii?Q?dO26yH78rR86EWgdrchg3HgtNdmFeK0OKqddkp9Ov09FnJDLTjfol9vvctcm?= =?us-ascii?Q?P59HbuX8AduZ9J2ZdG4dNQ771UIV7pfdn3fahrbFXlMY7xzlcq6pYQ/HzgK2?= =?us-ascii?Q?Z4pOCDlewsRfK2ubFh5E0h5a0rJwxdmfTRiuVv4ncpBcfmezOFO7UERuXgpu?= =?us-ascii?Q?CyEbUOUT1NEBmAYaSC7foyz9+oHhASX8+FOmZwT0/BzgQD3vNNYqm/dudU+H?= =?us-ascii?Q?LyF0lkVuYioslsdf+q09dFuXJIA2zC0RnsrNi7R2buy6HJMGZwvP507UWGIn?= =?us-ascii?Q?nCVWh+aoAX8qZ5X6r2zfWP3HcbUJuPv0Zm9RjGkPGyEayb+od/mEcNZRj6sf?= =?us-ascii?Q?QacPK+QpbBj7nzBGVCOtOZFew5FakcRj0mVp1zvLKVnznnTnYBlTjbM36WZi?= =?us-ascii?Q?PZDIH+ePC9pi3lXQ88RXg/MyT7dX0HQNGntW+vBvzxXEht5odOETdM7eXZuo?= =?us-ascii?Q?QQD+d20j4/82CEfE2uDeOhYtxKgkbTYfkif5h5YWcb+Xjeopd15dRDnJPQXn?= =?us-ascii?Q?yK+paBnIXL6WCbrWFwDh4vsaqq2PAKQsWTSt3Dv2PVkBHmTXpwlNu+thuzwC?= =?us-ascii?Q?zSli0pZKWXqh68GKZ8nI9zltFB6g1mn6Lc7gIbn6vHSRlO/Ovw0/j+1vUOk4?= =?us-ascii?Q?+sMg3izPTgIZaDZEc8/WxhCeHTXvYrPNp3oNWYAn96GPS8Na4aDXRSZKq04z?= =?us-ascii?Q?9APS3y6R8fIyQUWfiI1x9znLq/lLGocSlR4JE6MAdP3FeQsJVApn5bVIf7Q3?= =?us-ascii?Q?faqn3XEYHZ+lE4e6N8G6q6JSBxQ94lD09v73Qkzrs/YdgZB0ojuB+bnZZ0Ui?= =?us-ascii?Q?v684KR6zVSHwjn7o6ciPPEV8qes6wojQ8TEvCqYQOaJAVoIXAtBsYOnqCW3m?= =?us-ascii?Q?SEI4v7dxcYUy22QwoXaiCYDExYjQhk1sijTGtWI/iwkNZRn1J9Am061LMHZD?= =?us-ascii?Q?Yrb3R9aX74gmV7a2lOZ3DuM1fOsb9Kqtn+8ytUM+kfbw7jNGRoySEm7IN82w?= =?us-ascii?Q?GaCBCCzupten7YlBx5uZ/Hcf7o9WKvS9sx53RJGQZUlRCTKAp7jOnjpAzje3?= =?us-ascii?Q?hC2ii99offba7tjiV2P7Ys2yFEux19egdjpRwWrUSvCXZ2dl7AiYdI4iZtxN?= =?us-ascii?Q?oT3ND3U30jIz7NrLWzls/mxbOEwsd1H0et/xYS7L8LITHJXyAi7xngvlNN5j?= =?us-ascii?Q?zwOyhChLSrPR2s9bqdKpQ8+/EGYa89hXFqUaEW2Zmn4rJ/tPxwTbM0BtDW2D?= =?us-ascii?Q?eg=3D=3D?= X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 17f78769-4eba-486b-03fa-08db2047d24f X-MS-Exchange-CrossTenant-AuthSource: DM6PR21MB1370.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Mar 2023 02:41:44.8248 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0GFPFUdL3yklgQ0FzMRaMrblG9rylVkpc93gMcIpRQIQDUSAYSPP5T4jfptiwBIuy+AFIF9uUgfsp8tW7/WeJA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1313 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Full Hyper-V initialization, including support for hypercalls, is done as an apic_post_init callback via late_time_init(). mem_encrypt_init() needs to make hypercalls when it marks swiotlb memory as decrypted. But mem_encrypt_init() is currently called a few lines before late_time_init(), so the hypercalls don't work. Fix this by moving mem_encrypt_init() after late_time_init() and related clock initializations. The intervening initializations don't do any I/O that requires the swiotlb, so moving mem_encrypt_init() slightly later has no impact. Signed-off-by: Michael Kelley Reviewed-by: Tom Lendacky --- init/main.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/init/main.c b/init/main.c index 4425d17..7e9c0ca 100644 --- a/init/main.c +++ b/init/main.c @@ -1088,14 +1088,6 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) */ locking_selftest(); - /* - * This needs to be called before any devices perform DMA - * operations that might use the SWIOTLB bounce buffers. It will - * mark the bounce buffers as decrypted so that their usage will - * not cause "plain-text" data to be decrypted when accessed. - */ - mem_encrypt_init(); - #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && !initrd_below_start_ok && page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) { @@ -1112,6 +1104,17 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) late_time_init(); sched_clock_init(); calibrate_delay(); + + /* + * This needs to be called before any devices perform DMA + * operations that might use the SWIOTLB bounce buffers. It will + * mark the bounce buffers as decrypted so that their usage will + * not cause "plain-text" data to be decrypted when accessed. It + * must be called after late_time_init() so that Hyper-V x86/x64 + * hypercalls work when the SWIOTLB bounce buffers are decrypted. + */ + mem_encrypt_init(); + pid_idr_init(); anon_vma_init(); #ifdef CONFIG_X86 -- 1.8.3.1