On 05/16/2017 01:34 AM, Adam Carter wrote:
> Answer #1 :
>
>
> Asrock, Extreme6, 990FX, UEFI, AMD FX-9590
> Gigabyte, GA-MA790FX-UD5P, 790FX, BIOS, AMD PhenomII x4 980
>
>
> Hi Corbin,
>
> I noticed i didnt have x2apic enabled on my 990FX / FX-8350 system, so
> i've rebuilt/rebooted etc, but;
>
> # zgrep X2APIC /proc/config.gz
> CONFIG_X86_X2APIC=y
> # dmesg | grep -i x2apic
> #
>
> On my skylake box
> # dmesg | grep -i x2apic
> [ 0.044148] DMAR-IR: Queued invalidation will be enabled to support
> x2apic and Intr-remapping.
> [ 0.045802] DMAR-IR: Enabled IRQ remapping in x2apic mode
> [ 0.045908] x2apic enabled
> [ 0.046011] Switched APIC routing to cluster x2apic.
>
> What x2apic messages do you get on your 990FX / FX-9590 system?
Interesting kernel parameter for you to try :
( from '/usr/src/linux/Documentation/kernel-parameters.txt' )
x2apic_phys [X86-64,APIC] Use x2apic physical mode instead of
default x2apic cluster mode on platforms
supporting x2apic.
With that switch I have not been getting any output in 'dmesg' about
this at all.
Question :
Do you have this enabled in your kernel ...
> [ ] Support for Intel IOMMU using DMA Remapping Devices
Corbin
