linux-kernel - Re: [Bug 215867] New: tboot suspend broken

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Message-ID: <2a333dba2d9b0629cdbcfa08604fe21f66623762.camel@dolney.com>
Date:   Mon, 25 Apr 2022 11:51:49 -0400
From:   Unknown <kernel@...ney.com>
To:     Borislav Petkov <bp@...en8.de>, bugzilla-daemon@...nel.org,
        kernel@...ney.com, Vincent Donnefort <vincent.donnefort@....com>
Cc:     x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [Bug 215867] New: tboot suspend broken

Yes, still a problem with 5.17.4

On Thu, 2022-04-21 at 11:25 +0200, Borislav Petkov wrote:
> Switching to mail because I can't CC the patch author on bugzilla.
> 
> Vincent, see below. It points to your commit:
> 
> 453e41085183 ("cpu/hotplug: Add cpuhp_invoke_callback_range()")
> 
> @Derek, just to make sure: you're seeing this with the latest 5.17
> kernel too, correct?
> 
> Thx.
> 
> On Thu, Apr 21, 2022 at 02:07:42AM +0000,
> bugzilla-daemon@...nel.org wrote:
> > https://bugzilla.kernel.org/show_bug.cgi?id=215867
> > 
> >             Bug ID: 215867
> >            Summary: tboot suspend broken
> >            Product: Platform Specific/Hardware
> >            Version: 2.5
> >     Kernel Version: 5.12.0
> >           Hardware: All
> >                 OS: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: normal
> >           Priority: P1
> >          Component: x86-64
> >           Assignee: platform_x86_64@...nel-bugs.osdl.org
> >           Reporter: kernel@...ney.com
> >         Regression: Yes
> > 
> > I am using tboot (v1.10.5) to make use of intel-txt and all was
> > working fine
> > with the Linux kernel 5.10 series. However later in 5.12 release
> > candidates, I
> > have  proper booting however suspend is broken. I am using a Lenovo
> > T460p.
> > Usually when suspending on this machine the power button LED will
> > blink 8 times
> > and then it goes into a sleep state. With newer kernels I get power
> > LED and
> > caps lock LED blinking, cpu fan runs fast, and can't get out of
> > that state
> > without hard powerdown.
> > 
> > I did a git bisect on and found that commit
> > 453e41085183980087f8a80dada523caf1131c3c is the one that breaks
> > tboot+suspend
> > to ram. It is part of a series of some cpu hotplug commits.
> > 
> > Just to be clear: if I build a kernel from the commit just before
> > this one, I
> > can suspend and resume, but if I build with this commit I can not
> > suspend,
> > laptop gets stuck on blinking power LED. Let me also mention that,
> > given the
> > above commit, if I do not use tboot, I can suspend and resume ok.
> > It is only
> > within the tboot boot context that I have suspend&resume problems.
> > 
> > -- 
> > You may reply to this email to add a comment.
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