linux-kernel - Re: [kernel-hardening] [PATCH v5 06/10] arm64/mm: Disable section mappings if XPFO is enabled

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Message-ID: <20170811215205.x7e3zhx2mkseg7jy@smitten>
Date:   Fri, 11 Aug 2017 15:52:05 -0600
From:   Tycho Andersen <tycho@...ker.com>
To:     Laura Abbott <labbott@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kernel-hardening@...ts.openwall.com,
        Marco Benatto <marco.antonio.780@...il.com>,
        Juerg Haefliger <juerg.haefliger@...onical.com>
Subject: Re: [kernel-hardening] [PATCH v5 06/10] arm64/mm: Disable section
 mappings if XPFO is enabled

On Fri, Aug 11, 2017 at 03:13:02PM -0600, Tycho Andersen wrote:
> You're suggesting something like this instead? Seems to work fine.

And in fact, using this patch instead means that booting on 4k pages
works too... I guess because NO_BLOCK_MAPPINGS is looked at in a few
other places that matter too? Anyway, I'll use this patch instead,
thanks for the suggestion!

Tycho