linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Tom Lendacky <thomas.lendacky@amd.com>
To: Thomas Backlund <tmb@mageia.org>, linux-crypto@vger.kernel.org
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	gary.hook@amd.com, Brijesh Singh <brijesh.singh@amd.com>
Subject: Re: disabling psp in bios causes errors in dmesg
Date: Fri, 10 Aug 2018 09:11:56 -0500	[thread overview]
Message-ID: <1e514ed4-a2e1-32ec-4ec8-64134b2fdb9e@amd.com> (raw)
In-Reply-To: <3be85fc6-6323-b368-747f-b7650b3898b4@mageia.org>

On 8/10/2018 2:03 AM, Thomas Backlund wrote:
> 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:

Hmm, I'm not familiar with that BIOS option so I'm not exactly sure what
it is doing under the covers.  Having said that, it would seem that a
register read is indicating that SEV is supported when it is not on this
platform.  Maybe the register read is returning all 1s, (i.e. 0xffffffff).

You can work around this by blacklisting the ccp driver module for now.
In the mean time, we'll try to understand what is occurring here and
provide a fix if we can.

Thanks,
Tom

> 
> 
> [  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
> 
> 

  reply	other threads:[~2018-08-10 14:14 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-10  7:03 disabling psp in bios causes errors in dmesg Thomas Backlund
2018-08-10 14:11 ` Tom Lendacky [this message]
2018-08-21 16:47   ` Tom Lendacky
2018-08-22  7:19     ` Thomas Backlund

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1e514ed4-a2e1-32ec-4ec8-64134b2fdb9e@amd.com \
    --to=thomas.lendacky@amd.com \
    --cc=brijesh.singh@amd.com \
    --cc=gary.hook@amd.com \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tmb@mageia.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).