A311D GICv2, PCIe MSI Support, and Kernel v6.12

VIM3
1

Hello,

Our project requires a PCIe WWAN module that uses Message Signaled Interrupts (MSI).
Our research suggests that MSI support typically requires a GICv3 interrupt controller.

However, the A311D datasheet indicates it only has a GICv2 controller. Could you please confirm if this is correct?

We need to determine if this is a hardware limitation or if MSI can be enabled through software configuration. If it is a software matter, does Linux kernel v6.12 have the necessary support?

Thanks for your help.

2

Yes, it is.

Not sure about this on mainline.

3

Hi,

So, it’s not a hardware limitation, but rather a software restriction to GICv2?
Does that mean it’s uncertain whether the upcoming kernel v6.12 will continue to use GICv2 or switch to GICv3?

Thanks.

4

No, from the datasheet, it is GICv2.

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