Hello,
I'm trying to provide multiple CPUs for a linux VM on top of L4.
I'm using the qemu virt machine and building for aarch64. so I used *-smp*
option to provide more CPUs.
> $ qemu-system-aarch64 -M virt,virtualization=true -cpu cortex-a57 -smp 4
> -m 1024 -kernel ....etc....
Unfortunately, This didn't work. I tried to add more CPU device nodes to
the dts file *virt-arm_virt-64.dts *but it also didn't work.
I think that it's because of the provided interrupt-controller with
*virt-arm_virt-64.dts* in *l4/pkg/uvmm/conf/dts* which mentioned that it
supports only one CPU.
> icsoc {
> compatible = "simple-bus";
> #address-cells = <2>;
> #size-cells = <2>;
> ranges;
>
> /* Uvmm will adapt the compatible string depending on the present
> gic
> * version. It expects reg entries that provide enough space for
> the
> * Cpu/Dist interface for gicv2 (at least 0x1000, 0x1000) or the
> * Dist/Redist interface for gicv3 (0x10000, 0x20000 * number of
> cpus).
> *
> *The entries provided here support any gicv2 setup or a gicv3 setup
> * with one Cpu.*
> */
> gic: interrupt-controller {
> compatible = "arm,gic-400", "arm,cortex-a15-gic",
> "arm,cortex-a9-gic";
> #interrupt-cells = <3>;
> #address-cells = <0>;
> interrupt-controller;
> reg = <0 0x40000 0 0x10000>,
> <0 0x50000 0 0x20000>;
> };
> };
>
My question now, is there any workaround to support multiple CPUs for virt
machine on arm64 ?
Thanks,
Regards
--
Mohamed Dawod
*Software Engineer, *Cairo Egypt
--
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