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Re: [PATCH] x86/rapl: Do not load in a guest

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On Fri, 4 Dec 2015 19:28:07 +0100
Borislav Petkov <bp@alien8.de> wrote:

> On Fri, Dec 04, 2015 at 10:16:10AM -0800, Jacob Pan wrote:
> > CPU model detection is the first level checking.  
> 
> And in the case of RAPL, the only checking you can do. This is why it
> should've had a CPUID bit.
> 
I am 200% with you, all I can say is we are working on it. Look at the
pain in the driver for dealing with various quirks.

> > The error is about no valid domains (e.g. counters not working). So
> > the error on minnowboard board could be a real problem if you expect
> > to use RAPL.  
> 
> Right, and if you need to disable it there, you would need to add a
> quirk table looking at DMI strings or so. A CPUID bit might've been a
> bit better if BIOS update would clear it on those boards. Then, sw
> won't even try to load there.
who is gonna collect all the DMI strings? I don't think this is
scalable.
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[PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-03 19:30 +0100
  Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-03 19:40 +0100
    Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-03 19:50 +0100
      Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-03 20:10 +0100
        Re: [PATCH] x86/rapl: Do not load in a guest "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2015-12-04 00:10 +0100
          Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 00:30 +0100
            Re: [PATCH] x86/rapl: Do not load in a guest "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2015-12-04 01:40 +0100
  Re: [PATCH] x86/rapl: Do not load in a guest Ingo Molnar <mingo@kernel.org> - 2015-12-04 08:50 +0100
    Re: [PATCH] x86/rapl: Do not load in a guest Ingo Molnar <mingo@kernel.org> - 2015-12-04 09:30 +0100
      Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 11:30 +0100
        Re: [PATCH] x86/rapl: Do not load in a guest Paolo Bonzini <pbonzini@redhat.com> - 2015-12-04 11:50 +0100
          Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 12:00 +0100
            Re: [PATCH] x86/rapl: Do not load in a guest Ingo Molnar <mingo@kernel.org> - 2015-12-04 13:00 +0100
              Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-04 18:50 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Paolo Bonzini <pbonzini@redhat.com> - 2015-12-04 19:00 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 19:10 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-04 19:20 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 19:30 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-04 19:50 +0100
                Re: [PATCH] x86/rapl: Do not load in a guest Borislav Petkov <bp@alien8.de> - 2015-12-04 20:50 +0100
    Re: [PATCH] x86/rapl: Do not load in a guest Peter Zijlstra <peterz@infradead.org> - 2015-12-04 09:30 +0100
      Re: [PATCH] x86/rapl: Do not load in a guest Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-12-04 19:00 +0100
        Re: [PATCH] x86/rapl: Do not load in a guest Peter Zijlstra <peterz@infradead.org> - 2015-12-04 23:20 +0100
          Re: [PATCH] x86/rapl: Do not load in a guest "H. Peter Anvin" <hpa@zytor.com> - 2015-12-04 23:50 +0100

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