From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/23] KAISER: unmap most of the kernel from userspace page tables
Date: Thu, 2 Nov 2017 19:01:07 +0000 [thread overview]
Message-ID: <20171102190106.GC22263@arm.com> (raw)
In-Reply-To: <20171031223146.6B47C861@viggo.jf.intel.com>
Hi Dave,
[+linux-arm-kernel]
On Tue, Oct 31, 2017 at 03:31:46PM -0700, Dave Hansen wrote:
> KAISER makes it harder to defeat KASLR, but makes syscalls and
> interrupts slower. These patches are based on work from a team at
> Graz University of Technology posted here[1]. The major addition is
> support for Intel PCIDs which builds on top of Andy Lutomorski's PCID
> work merged for 4.14. PCIDs make KAISER's overhead very reasonable
> for a wide variety of use cases.
I just wanted to say that I've got a version of this up and running for
arm64. I'm still ironing out a few small details, but I hope to post it
after the merge window. We always use ASIDs, and the perf impact looks
like it aligns roughly with your findings for a PCID-enabled x86 system.
Cheers,
Will
next parent reply other threads:[~2017-11-02 19:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20171031223146.6B47C861@viggo.jf.intel.com>
2017-11-02 19:01 ` Will Deacon [this message]
2017-11-02 19:38 ` [PATCH 00/23] KAISER: unmap most of the kernel from userspace page tables Dave Hansen
2017-11-03 13:41 ` Will Deacon
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