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Groups > linux.kernel > #1356144
| From | Paolo Bonzini <pbonzini@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" |
| Date | 2016-03-11 20:20 +0100 |
| Message-ID | <rbALo-2lN-17@gated-at.bofh.it> (permalink) |
| References | (6 earlier) <rbczp-1Pk-17@gated-at.bofh.it> <rbe8a-2SM-17@gated-at.bofh.it> <rberw-312-17@gated-at.bofh.it> <rbviH-6Sm-21@gated-at.bofh.it> <rbvC1-70o-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 11/03/2016 14:40, Borislav Petkov wrote:
> On Fri, Mar 11, 2016 at 01:23:56PM +0000, One Thousand Gnomes wrote:
>> > Pentium Pro has MTRR, PAT came later.
> Yep, this page says so too:
>
> http://www.cpu-world.com/CPUs/Pentium-II/Intel-Pentium%20Pro%20200%201%20MB%20-%20GJ80521EX200%201M%20%28BP80521200%201M%29.html
>
>> > I believe the qemu32 CPU isn't a "real" CPU type therefore.
> And why is that so? I suspect it has again something to do with
> migration and fun. Let me add the kvm ML.
>
> Guys, does anyone have an idea why
>
> #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
> CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
> CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
> CPUID_PAE | CPUID_SEP | CPUID_APIC)
>
> has CPUID_PAT *instead* of CPUID_MTRR?
Somebody got it wrong 10-ish years ago, and nobody has ever checked since.
But, don't use qemu32 or qemu64. Use kvm32 and kvm64, or better
something like the host you run on ("-cpu Nehalem", "-cpu SandyBridge",
"-cpu Haswell-noTSX" etc.).
I really, really should fix those defaults...
Paolo
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Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-04 19:40 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-04 22:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-07 01:40 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-07 16:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-07 23:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-08 01:00 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-08 01:10 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-08 01:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-08 04:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-08 16:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-10 15:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-10 17:00 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-10 18:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-10 20:10 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-10 20:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-10 20:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-03-11 14:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-11 14:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paolo Bonzini <pbonzini@redhat.com> - 2016-03-11 20:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-11 23:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Bruce Ashfield <bruce.ashfield@windriver.com> - 2016-03-11 23:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Richard Purdie <richard.purdie@linuxfoundation.org> - 2016-03-12 00:50 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-12 13:10 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-10 20:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-10 20:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-10 20:40 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Borislav Petkov <bp@suse.de> - 2016-03-10 22:10 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-10 23:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-08 04:20 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-08 16:30 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Toshi Kani <toshi.kani@hpe.com> - 2016-03-08 17:10 +0100
Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-03-08 17:10 +0100
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