On Tuesday 28 June 2011 03:37 pm, Vitaly Magerya wrote: > > I think that part (but not all) of the differences between > > FreeBSD and Linux can be explained by the fact that FreeBSD > > currently doesn't advertise itself as featuring > > ACPI_CAP_SMP_C1_NATIVE and ACPI_CAP_SMP_C3_NATIVE. I am not sure > > what it would take to actually support these features. I think > > that Linux does support (or at least advertise support) for these > > features. > > Is there some simple way of sending fake advertisement? Or will > that lead to disaster?
Actually, ACPI_CAP_SMP_C1_NATIVE is kinda supported but without hints from ACPI _CST FFH. It sits in machdep.c as cpu_idle_mwait(). So, I think you can advertise them. The easist way is this (not tested): Index: sys/dev/acpica/acpi_cpu.c =================================================================== --- sys/dev/acpica/acpi_cpu.c (revision 223651) +++ sys/dev/acpica/acpi_cpu.c (working copy) @@ -339,6 +339,10 @@ acpi_cpu_attach(device_t dev) * SMP control where each CPU can have different settings. */ sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3; +#if defined(__amd64__) || defined(__i386__) + if ((cpu_feature2 & CPUID2_MON) != 0) + sc->cpu_features |= ACPI_CAP_SMP_C1_NATIVE; +#endif if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { for (i = 0; i < drv_count; i++) { if (ACPI_GET_FEATURES(drivers[i], &features) == 0) ACPI_CAP_SMP_C3_NATIVE is also kinda supported without hints from the GAS. Jung-uk Kim _______________________________________________ freebsd-acpi@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-acpi To unsubscribe, send any mail to "freebsd-acpi-unsubscr...@freebsd.org"