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Groups > linux.kernel > #1355902
| From | One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: runtime regression with "x86/mm/pat: Emulate PAT when it is disabled" |
| Date | 2016-03-11 14:30 +0100 |
| Message-ID | <rbviH-6Sm-21@gated-at.bofh.it> (permalink) |
| References | (6 earlier) <rba4y-8hd-5@gated-at.bofh.it> <rbbai-G2-13@gated-at.bofh.it> <rbczp-1Pk-17@gated-at.bofh.it> <rbe8a-2SM-17@gated-at.bofh.it> <rberw-312-17@gated-at.bofh.it> |
| Organization | Intel Corporation |
On Thu, 10 Mar 2016 20:19:33 +0100 Borislav Petkov <bp@suse.de> wrote: > On Thu, Mar 10, 2016 at 02:04:29PM -0500, Paul Gortmaker wrote: > > So, I guess that is a qemu bug? If there is no real silicon out there > > that has no MTRR but does claim PAT, then qemu32 is a flawed CPU type? > > Well, AFAICT, "qemu32" is emulating something PPRO-like: > > #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 | \ > ^^^^^^^^^ > > and that one advertizes PAT but not MTRRs. > > I need to go dig into history to find out what PPRO actually supported. Pentium Pro has MTRR, PAT came later. I believe the qemu32 CPU isn't a "real" CPU type therefore. Alan
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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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