On Thu, Dec 08, 2016 at 10:04:25AM +0100, Thomas Gleixner wrote:
> The logical package management has several issues:
>
> - The APIC ids provided by ACPI are not required to be the same as the
> initial APIC id which can be retrieved by CPUID. The APIC ids provided
> by ACPI are those which are written by the BIOS into the APIC. The
> initial id is set by hardware and can not be changed. The hardware
> provided ids contain the real hardware package information.
>
> Especially AMD sets the effective APIC id different from the hardware id
> as they need to reserve space for the IOAPIC ids starting at id 0.
>
> As a consequence those machines trigger the currently active firmware
> bug printouts in dmesg, These are obviously wrong.
>
> - Virtual machines have their own interesting way of enumerating APICs and
> packages which are not reliably covered by the current implementation.
>
> The sizing of the mapping array has been tweaked to be generously large to
> handle systems which provide a wrong core count when HT is disabled so the
> whole magic which checks for space in the physical hotplug case is not
> needed anymore.
>
> Simplify the whole machinery and do the mapping when the CPU starts and the
> CPUID derived physical package information is available. This solves the
> observed problems on AMD machines and works for the virtualization issues
> as well.
>
> Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Already
Tested-by: Borislav Petkov <b...@suse.de>
Thanks!
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
