linux-kernel - Re: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf

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Date:   Sat, 9 Sep 2017 21:19:34 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Markus Trippelsdorf <markus@...ppelsdorf.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g.
 perf

On Sat, Sep 09, 2017 at 09:11:33PM +0200, Borislav Petkov wrote:
> On Sat, Sep 09, 2017 at 08:46:38PM +0200, Markus Trippelsdorf wrote:
> > OK. ADDR is 12. The rest is the same (modulo time).
> 
> I'm assuming that's 12 hex... yeah, "ADDR %llx ".
> 
> Dammit, that should have "0x" prepended. Grrr, I'll fix all that next
> week.

Ok, that 0x12 looks like it fits the TlbCacheDis thing (bits [5:1]):

"0_1001b

Link: A specific coherent-only packet from a CPU was issued to an
IO link. This may be caused by software which addresses page table
structures in a memory type other than cacheable WB-DRAM without
properly configuring MSRC001_0015[TlbCacheDis]. This may occur, for
example, when page table structure addresses are above top of memory. In
such cases, the NB will generate an MCE if it sees a mismatch between
the memory operation generated by the core and the link type. See
2.9.3.1.2 [Determining The Access Destination for CPU Accesses]."

-- 
Regards/Gruss,
    Boris.

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