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Subject: Re: [PATCH 00/11] [v5] Use global pages with PTI
References: <20180406205501.24A1A4E7@viggo.jf.intel.com>
 <c96373d0-c16a-4463-147c-8624ad90af61@amd.com>
 <b9802f89-93b3-b535-742c-f84e9f5be832@linux.intel.com>
 <1b45ffd1-99bb-4ac1-fb65-0de3e42c1c0a@amd.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
Message-ID: <f87b6f47-2416-4c12-55dd-5f0cb86f1464@linux.intel.com>
Date: Mon, 9 Apr 2018 12:50:20 -0700
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Sender: owner-linux-mm@kvack.org
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To: Tom Lendacky <thomas.lendacky@amd.com>, linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, aarcange@redhat.com, luto@kernel.org, torvalds@linux-foundation.org, keescook@google.com, hughd@google.com, jgross@suse.com, x86@kernel.org, namit@vmware.com

On 04/09/2018 11:59 AM, Tom Lendacky wrote:
> On 4/9/2018 1:17 PM, Dave Hansen wrote:
>> On 04/09/2018 11:04 AM, Tom Lendacky wrote:
>>> On 4/6/2018 3:55 PM, Dave Hansen wrote:
>>>> Changes from v4
>>>>  * Fix compile error reported by Tom Lendacky
>>> This built with CONFIG_RANDOMIZE_BASE=y, but failed to boot successfully.
>>> I think you're missing the initialization of __default_kernel_pte_mask in
>>> kaslr.c.
>>
>> This should be simple to fix (just add a -1 instead of 0), but let me
>> double-check and actually boot the fix.
> 
> Yup, added an "= ~0" and everything is good.

I'm testing at this commit in the tip tree:

0564258... x86/pti: Leave kernel text global for !PCID

It seems to boot OK with RANDOMIZE_BASE=y for both PCID and non-PCID
configuration.  Could you send along your .config so I can try to reproduce?