From: Thomas Backlund Subject: disabling psp in bios causes errors in dmesg Date: Fri, 10 Aug 2018 10:02:41 +0259 Message-ID: <3be85fc6-6323-b368-747f-b7650b3898b4@mageia.org> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 8bit Cc: Linux Kernel Mailing List , , To: Return-path: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Hi, this is tested on kernel 4.17.14 hw: MSI X399 GAMING PRO CARBON AC (MS-7B09) bios 1.A0 AMD Ryzen Threadripper 1950X Disabling psp in bios gets this in the logs: [? 246.748978] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [? 246.748978] systemd-udevd?? D??? 0?? 724??? 716 0x80000124 [? 246.748980] Call Trace: [? 246.748986]? ? __schedule+0x234/0x840 [? 246.748988]? schedule+0x28/0x80 [? 246.748993]? __sev_do_cmd_locked+0x1f0/0x270 [ccp] [? 246.748996]? ? wait_woken+0x80/0x80 [? 246.748997]? ? 0xffffffffc0683000 [? 246.749001]? __sev_platform_init_locked+0x2f/0x80 [ccp] [? 246.749001]? ? mutex_lock+0xe/0x30 [? 246.749004]? sev_platform_init+0x1d/0x30 [ccp] [? 246.749007]? psp_pci_init+0x40/0xe0 [ccp] [? 246.749008]? ? 0xffffffffc0683000 [? 246.749011]? sp_mod_init+0x16/0x1000 [ccp] [? 246.749012]? do_one_initcall+0x46/0x1c3 [? 246.749014]? ? _cond_resched+0x15/0x30 [? 246.749017]? ? kmem_cache_alloc_trace+0x3a/0x170 [? 246.749019]? do_init_module+0x5a/0x210 [? 246.749020]? load_module+0x215b/0x2530 [? 246.749021]? ? kmem_cache_alloc_node_trace+0x45/0x190 [? 246.749024]? ? vmap_page_range_noflush+0x24d/0x320 [? 246.749026]? ? __do_sys_init_module+0x136/0x180 [? 246.749026]? ? _cond_resched+0x15/0x30 [? 246.749027]? __do_sys_init_module+0x136/0x180 [? 246.749029]? do_syscall_64+0x55/0x100 [? 246.749031]? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [? 246.749032] RIP: 0033:0x7ffb1a09018a [? 246.749033] RSP: 002b:00007ffe196680c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af [? 246.749034] RAX: ffffffffffffffda RBX: 00005562bb20d080 RCX: 00007ffb1a09018a [? 246.749034] RDX: 00007ffb1994e6f8 RSI: 0000000000029e50 RDI: 00005562bba5e710 [? 246.749035] RBP: 00007ffb1994e6f8 R08: 0000000000000004 R09: 0000000000000000 [? 246.749035] R10: 0000000000000005 R11: 0000000000000246 R12: 00005562bba5e710 [? 246.749036] R13: 0000000000020000 R14: 00005562bb1fde70 R15: 00005562bb20d080 Should it not detect that its disabled and bail out ? -- Thomas