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Date:   Fri, 31 Aug 2018 09:02:23 -0700
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Guillaume Tucker <guillaume.tucker@collabora.com>
Cc:     Guenter Roeck <linux@roeck-us.net>,
        Roland Dreier <roland@purestorage.com>,
        Ben Hutchings <ben.hutchings@codethink.co.uk>,
        LKML <linux-kernel@vger.kernel.org>, stable@vger.kernel.org,
        matt@codeblueprint.co.uk, bp@suse.de,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@amacapital.net>, luto@kernel.org,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>, bp@alien8.de,
        brgerst@gmail.com, davej@codemonkey.org.uk, dvlasenk@redhat.com,
        "H. Peter Anvin" <hpa@zytor.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        sai.praneeth.prakhya@intel.com, sds@tycho.nsa.gov,
        Thomas Gleixner <tglx@linutronix.de>, toshi.kani@hp.com,
        linux-efi@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
        Yazen.Ghannam@amd.com
Subject: Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only
 contains page frame numbers"
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On Fri, Aug 31, 2018 at 07:24:08AM +0100, Guillaume Tucker wrote:
> On 24/08/18 21:32, Guenter Roeck wrote:
> > On Fri, Aug 24, 2018 at 01:16:18PM -0700, Roland Dreier wrote:
> >>> Sounds great. I'll hold off with sending my RFT series and wait for your
> >>> test results. I think we'll also need d367cef0a7f0c6 ("x86/mm/pat: Fix
> >>> boot crash when 1GB pages are not supported by the CPU").
> >>
> >> Sure, makes sense - I don't have any EFI systems with CPUs old enough
> >> not to support 1G pages but that looks reasonable.  I'll pull that
> >> into my tree as well.
> >>
> > kernelci reported a crash on a CPU which doesn't support 1G pages.
> > See https://kernelci.org/boot/id/5b7d39ea59b514c03796ba9c/
> 
> Looks like this has now been fixed with Andi's patch in 4.4.153:
> 
>   "x86/mm/pat: Fix L1TF stable backport for CPA"
> 
> I can confirm this platform is now booting fine in kernelci:
> 
>   http://lava.streamtester.net/scheduler/job/146195

Wonderful, thanks for letting us know.

greg k-h