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Virtualization layers (was: Constant Stack Canaries)

From Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups comp.arch
Subject Virtualization layers (was: Constant Stack Canaries)
Date 2025-04-16 17:48 -0400
Organization A noiseless patient Spider
Message-ID <jwv4iynhjhv.fsf-monnier+comp.arch@gnu.org> (permalink)
References (8 earlier) <07451feab34704115f6b9487cbcd6df9@www.novabbs.org> <1GtLP.2610861$TBhc.2239154@fx16.iad> <005f8b290a83aa0b6c1714369a1e540d@www.novabbs.org> <IQOLP.1774060$FVcd.1714307@fx10.iad> <694fc2e37e0bcb6de19c0e1d1d0f0042@www.novabbs.org>

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> Given 4 layers in the stack {Secure, Hyper, Super, User} and we have
> interrupts targeting {Secure, Hyper, Super}, do we pick up any liability
> or do we gain flexibility by being able to target interrupts directly to
> {user} ?? (the 4th element).

All these discussions seem to presume a very fixed structure that (I
presume) corresponds to a typical situation in servers nowadays.

But shouldn't the hardware aim for something more flexible to account
for other use cases?

E.g. What if I want to run my own VM as a user?  Or my own HV?
That's likely to be a common desire for people working on the
development and testing of OSes and HVs?


        Stefan

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Thread

Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-03-30 08:16 -0400
  Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-03-30 12:47 -0500
    Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-03-30 20:14 +0000
      Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-03-30 21:26 -0400
      Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-03-31 01:34 -0500
      Re: Constant Stack Canaries Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-03-31 09:04 -0700
        Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-03-31 12:17 -0500
          Re: Constant Stack Canaries Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-03-31 10:57 -0700
          Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-03-31 18:07 +0000
            Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-03-31 13:56 -0500
              Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-03-31 20:52 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-01 00:58 -0400
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-01 18:51 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-01 18:06 -0400
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-01 23:24 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-01 20:07 -0400
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-02 01:47 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-04 21:07 +0000
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-01 16:21 -0500
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-01 18:19 -0400
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-01 23:04 -0500
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-01 14:34 -0500
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-01 23:21 +0000
                Re: Constant Stack Canaries Stefan Monnier <monnier@iro.umontreal.ca> - 2025-04-01 22:55 -0400
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-01 23:19 -0500
                Re: Constant Stack Canaries Stefan Monnier <monnier@iro.umontreal.ca> - 2025-04-03 10:09 -0400
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-03 12:22 -0500
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-03 23:49 -0400
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-04 12:41 -0500
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-04 21:13 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-04 23:45 -0400
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-05 16:37 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-05 18:31 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-05 17:57 -0400
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-05 23:11 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-06 14:21 +0000
                Re: Constant Stack Canaries Robert Finch <robfi680@gmail.com> - 2025-04-06 15:01 -0400
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-07 14:04 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-05 23:06 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-06 14:32 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-07 00:51 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-07 14:09 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-09 00:23 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-15 00:43 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-15 14:02 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-15 20:46 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-16 14:07 +0000
                Re: Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-16 21:13 +0000
                Virtualization layers (was: Constant Stack Canaries) Stefan Monnier <monnier@iro.umontreal.ca> - 2025-04-16 17:48 -0400
                Re: Virtualization layers mitchalsup@aol.com (MitchAlsup1) - 2025-04-16 22:12 +0000
                Re: Virtualization layers (was: Constant Stack Canaries) scott@slp53.sl.home (Scott Lurndal) - 2025-04-17 00:49 +0000
                Re: Constant Stack Canaries Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-04-16 15:26 -0700
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-17 00:57 +0000
                Re: virtualization, Constant Stack Canaries John Levine <johnl@taugh.com> - 2025-04-17 01:04 +0000
                Re: virtualization, Constant Stack Canaries Stefan Monnier <monnier@iro.umontreal.ca> - 2025-04-16 21:07 -0400
                Re: virtualization, Constant Stack Canaries Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-04-16 23:30 -0700
                Re: virtualization, Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-17 13:32 +0000
                Re: virtualization, Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-17 18:22 +0000
                Re: virtualization, Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-17 20:10 +0000
                Re: virtualization, Constant Stack Canaries mitchalsup@aol.com (MitchAlsup1) - 2025-04-17 21:45 +0000
                Re: Constant Stack Canaries scott@slp53.sl.home (Scott Lurndal) - 2025-04-17 00:47 +0000
                Re: Constant Stack Canaries BGB <cr88192@gmail.com> - 2025-04-02 00:43 -0500

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