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Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux

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tl;dr?

Somewhere in here are some actual questions which I will attempt to
answer. Please try and be more concise in future.

On 16/03/16 20:08, Luis R. Rodriguez wrote:
> Toshi noted a while ago as well that if BIOS/firmware enables MTRR but
> the kernel does not have it enabled one issue might have been any
> MTRRs set up by the BIOS and ensuring the mapping is respected, in
> particular UC settings, this concern is raised above. Another issue
> though is that the kernel would be "unable to verify if a large page
> mapping is aligned with MTRRs" [3]

This is not a relevant concern for Xen guests:   PV guests do not
support superpage mappings and HVM guests never see real MTRRs.

David

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Thread

MTRR on Xen - BIOS use and implications for Linux "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-16 21:10 +0100
  Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux David Vrabel <david.vrabel@citrix.com> - 2016-03-17 12:20 +0100
    Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-17 20:00 +0100
      Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-29 19:30 +0200
        Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux Toshi Kani <toshi.kani@hpe.com> - 2016-03-29 23:30 +0200
          Re: [Xen-devel] MTRR on Xen - BIOS use and implications for Linux "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-30 00:30 +0200

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