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Message-ID: <132d8ad8-a85f-5184-2dee-39a47e22e1ff@linux.intel.com>
Date: Thu, 23 Nov 2017 22:41:53 -0800
From: Dave Hansen <dave.hansen@...ux.intel.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
moritz.lipp@...k.tugraz.at, daniel.gruss@...k.tugraz.at,
michael.schwarz@...k.tugraz.at, richard.fellner@...dent.tugraz.at,
luto@...nel.org, torvalds@...ux-foundation.org,
keescook@...gle.com, hughd@...gle.com, x86@...nel.org,
jgross@...e.com
Subject: Re: [PATCH 00/23] [v4] KAISER: unmap most of the kernel from
userspace page tables
On 11/23/2017 10:35 PM, Ingo Molnar wrote:
> So the pteval_t changes break the build on most non-x86 architectures (alpha, arm,
> arm64, etc.), because most of them don't have an asm/pgtable_types.h file.
>
> pteval_t is an x86-ism.
>
> So I left out the changes below.
There was a warning on the non-PAE 32-bit builds saying that there was a
shift larger than the type. I assumed this was because of a reference
to _PAGE_NX, and thus we needed a change to pteval_t.
But, now that I think about it more, that doesn't make sense since
_PAGE_NX should be #defined down to a 0 on those configs unless
something is wrong.
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