On Thu, 10 Mar 2016 20:19:33 +0100 Borislav Petkov <b...@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
