MSI-X vectors translates the interrupt through its, the GIC and my network
device DTS node in root cell:
gic: interrupt-controller@6000000 {
compatible= "arm,gic-v3";
#address-cells = <2>;
#size-cells = <2>;
ranges;
reg= <0x0 0x06000000 0 0x10000>, /* GIC Dist */
<0x0 0x06040000 0 0x40000>; /* GIC Redistributor */
#interrupt-cells= <3>;
interrupt-controller;
interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0xf) |
IRQ_TYPE_LEVEL_LOW)>;
its: gic-its@6020000 {
compatible = "arm,gic-v3-its";
msi-controller;
reg = <0x0 0x06020000 0 0x20000>;/* GIC Translater
*/
};
};
enetc_pcie: pcie@1f0000000 { /* Integrated Endpoint Root
Complex */
compatible = "pci-host-ecam-generic";
reg = <0x01 0xf0000000 0x0 0x100000>;
#address-cells = <3>;
#size-cells = <2>;
msi-parent = <&its>;
device_type = "pci";
bus-range = <0x0 0x0>;
dma-coherent;
msi-map = <0 &its 0x17 0xe>;
...
}
and I copy them all related nodes into cell DTS.
so, I need more effort on MSI-X in cell?
On Friday, October 15, 2021 at 9:56:26 PM UTC+8 [email protected] wrote:
> On 15.10.21 14:25, Changming Huang wrote:
> > hi, guys,
> > I have Arm64 platform (GIC-V3 is used) which integrates one real PCIe
> > network device.
> > This PCIe network device just supports MSI-X, and it works fine in
> > root-cell Linux.
> > I want to enable this PCIe network device in cell (cell runs Linux, too).
> > I can disable this PCIe device in root-cell by removing its node in DTS
> > file.
> > I added the PCIe network device node into cell DTS (like root-cell DTS)
> > But I got the error "MSIX alloc failed" during booting cell Linux.
> > Appreciate for the clue for this issue!
> >
> > I checked the jailhouse source and document, and I didn't find the
> > description about the real PCIe device with MSI-X.
> >
>
> MSI-X is tricky on ARM. The complete IRQ path, as it is also taken on
> the root cell, needs to be available in the non-root cell. By default,
> Jailhouse only manages GICD sharing. How are MSI-X vectors translated
> into interrupt numbers normally on your platform?
>
> Jan
>
> --
> Siemens AG, T RDA IOT
> Corporate Competence Center Embedded Linux
>
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