Messages in this thread | | | Date | Fri, 18 Jan 2013 20:58:06 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH] drivers/cpufreq: Warn user when powernow-k8 tries to fall back to acpi-cpufreq and it is unavailable. |
| |
On Fri, Jan 18, 2013 at 07:38:34PM +0000, Matthew Garrett wrote: > On Fri, Jan 18, 2013 at 08:36:56PM +0100, Borislav Petkov wrote: > > > Ok, how much can we rely on ACPI to have this ACPI_ADR_SPACE_SYSTEM_IO > > properly set on K8? Because the thing is, we want to use acpi-cpufreq on > > F10h onwards and leave powernow-k8 to K8s. > > SYSTEM_IO only supports single processors and was superceded in ACPI > 2.0. Are there any single-core F10h?
Hmm, maybe some downcored creations, who knows? But actually, that doesn't matter: we want to exit early from acpi-cpufreq loading on K8 only so the check should simply be:
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && boot_cpu_data.x86 == 0xf) { pr_debug(...) ... }
Yeah, I think that should work. I'll add your patch to the others and make a patchset to give it a run. If it looks good, we'll queue it for 3.9 so that it can see more testing.
Thanks.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
| |