iq-x5121-evk: add x1 el2 DTBO building and FIT DTB mapping

[xinlon-z]

KVM support on IQ-X5121 Evaluation Kit requires applying the el2 DTBO at boot. Add FIT_DTB_COMPATIBLE entries to allow UEFI to correctly match and apply the x1-el2.dtbo(shared the same one with IQ-X7181 #2234 ) overlay when booting with KVM.

Generated ITS file overview

$ cat build/tmp/deploy/images/iq-x5121-evk/qclinux-fit-image.its
/dts-v1/;

/ {
        description = "Kernel fitImage for Qualcomm Linux Reference Distro/7.0+git/iq-x5121-evk";
        #address-cells = <1>;
        images {
                fdt-qcom-metadata.dtb {
                        description = "Flattened Device Tree blob";
                        type = "qcom_metadata";
                        compression = "none";
                        data = /incbin/("/local/mnt/workspace/xinlon/work/hamoa_mainline/build/tmp/work/iq_x5121_evk-qcom-linux/linux-qcom-next/7.0+git/linux-qcom-next-7.0+git/arch/arm64/boot/dts/qcom/qcom-metadata.dtb");
                        arch = "arm64";
                };
                fdt-x1-el2.dtbo {
                        description = "Flattened Device Tree blob";
                        type = "flat_dt";
                        compression = "none";
                        data = /incbin/("/local/mnt/workspace/xinlon/work/hamoa_mainline/build/tmp/work/iq_x5121_evk-qcom-linux/linux-qcom-next/7.0+git/linux-qcom-next-7.0+git/arch/arm64/boot/dts/qcom/x1-el2.dtbo");
                        arch = "arm64";
                };
                fdt-purwa-iot-evk.dtb {
                        description = "Flattened Device Tree blob";
                        type = "flat_dt";
                        compression = "none";
                        data = /incbin/("/local/mnt/workspace/xinlon/work/hamoa_mainline/build/tmp/work/iq_x5121_evk-qcom-linux/linux-qcom-next/7.0+git/linux-qcom-next-7.0+git/arch/arm64/boot/dts/qcom/purwa-iot-evk.dtb");
                        arch = "arm64";
                };
        };
        configurations {
                conf-1 {
                        description = "FDT Blob";
                        fdt = "fdt-purwa-iot-evk.dtb";
                        compatible = "qcom,purwa-evk";
                };
                conf-2 {
                        description = "FDT Blob";
                        fdt = "fdt-purwa-iot-evk.dtb", "fdt-x1-el2.dtbo";
                        compatible = "qcom,purwa-evk";
                };
        };
};

KVM Boot log:

root@iq-x5121-evk:~# dmesg | grep kvm
[    0.092851] kvm [1]: nv: 570 coarse grained trap handlers
[    0.092985] kvm [1]: nv: 710 fine grained trap handlers
[    0.093060] kvm [1]: IPA Size Limit: 44 bits
[    0.093071] kvm [1]: GICv4 support disabled
[    0.093072] kvm [1]: GICv3: no GICV resource entry
[    0.093073] kvm [1]: disabling GICv2 emulation
[    0.093088] kvm [1]: GIC system register CPU interface enabled
[    0.093100] kvm [1]: vgic interrupt IRQ9
[    0.093119] kvm [1]: Broken CNTVOFF_EL2, trapping virtual timer
[    0.093123] kvm [1]: VHE mode initialized successfully
root@iq-x5121-evk:~# ls -alh /dev/kvm
crw-rw-rw- 1 root kvm 10, 232 Mar 13 15:35 /dev/kvm

Pending by issue: #1962

[xinlon-z]

This PR depends on PR #2165 being merged to resolve issue #1962.