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Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not mapkernel in user mode

From Richard Weinberger <richard@nod.at>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not mapkernel in user mode
Date 2017-05-09 17:00 +0200
Message-ID <tFeMj-37Z-19@gated-at.bofh.it> (permalink)
References (3 earlier) <tECdZ-30b-41@gated-at.bofh.it> <tECdZ-30b-39@gated-at.bofh.it> <tECxm-3oj-69@gated-at.bofh.it> <tECH0-3sL-7@gated-at.bofh.it> <tFeMi-37Z-9@gated-at.bofh.it>
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Am 09.05.2017 um 16:44 schrieb Fogh, Anders:
>>> i.e. how does it perform on recent AMD systems?
> 
> Sorry for the latency. Recent AMD is reported by Enrique Nissem to not
> be vulnerable to the prefetch attack. TSX attack doesn't apply to AMD.
> Hund, Willems & Holz wrote in 2013 that AMD was vulnerable to that
> attack. The BTB is almost surely working in a different manner of
> fashion if at all. So AMD may or may not be vulnerable to the DPF
> attack, but none of the modern attacks should work - at least out of the
> box.

But the promoted patch will also run on AMD systems, that's why I asked
for the overhead.

Thanks,
//richard

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[RFC, PATCH] x86_64: KAISER - do not map kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-04 12:20 +0200
  Re: [RFC, PATCH] x86_64: KAISER - do not map kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-04 14:30 +0200
  Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Thomas Garnier <thgarnie@google.com> - 2017-05-04 17:30 +0200
    Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-05 10:30 +0200
      Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Thomas Garnier <thgarnie@google.com> - 2017-05-05 17:50 +0200
        Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode David Gens <david.gens@cs.tu-darmstadt.de> - 2017-05-06 06:40 +0200
          Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-06 10:40 +0200
            Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Mark Rutland <mark.rutland@arm.com> - 2017-05-08 12:30 +0200
              Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 13:00 +0200
                Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Mark Rutland <mark.rutland@arm.com> - 2017-05-08 15:30 +0200
                Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 15:50 +0200
            Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 16:00 +0200
              Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Thomas Garnier <thgarnie@google.com> - 2017-05-08 16:20 +0200
                Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 16:20 +0200
      Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 15:30 +0200
  Re: [RFC, PATCH] x86_64: KAISER - do not map kernel in user mode Christoph Hellwig <hch@infradead.org> - 2017-05-04 17:50 +0200
    Re: [RFC, PATCH] x86_64: KAISER - do not map kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-05 09:50 +0200
      Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-07 23:50 +0200
        Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Richard Weinberger <richard@nod.at> - 2017-05-08 00:10 +0200
          Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-08 00:20 +0200
            Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not mapkernel in user mode "Fogh, Anders" <anders.fogh@gdata-adan.de> - 2017-05-09 17:00 +0200
              Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not  mapkernel in user mode Richard Weinberger <richard@nod.at> - 2017-05-09 17:00 +0200
                Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not  mapkernel in user mode Rik van Riel <riel@redhat.com> - 2017-05-09 17:40 +0200
      Re: [kernel-hardening] Re: [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Richard Weinberger <richard.weinberger@gmail.com> - 2017-05-08 00:10 +0200
  Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Jann Horn <jannh@google.com> - 2017-05-05 18:00 +0200
    Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Daniel Gruss <daniel.gruss@iaik.tugraz.at> - 2017-05-06 10:30 +0200
  Re: [kernel-hardening] [RFC, PATCH] x86_64: KAISER - do not map  kernel in user mode Jann Horn <jannh@google.com> - 2017-05-05 18:00 +0200

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