enable GIC for kvm for Jetson Nano (tegra210), make sure you edit /boot/extlinux/extlinux.conf, add "FDT /boot/tegra210-p3448-XXXX-p3449-XXXX-XXX.dtb"

jetson-nano-kvm-gic.patch

--- a/hardware/nvidia/soc/t210/kernel-dts/tegra210-soc/tegra210-soc-base.dtsi     2020-08-31 08:40:36.602176618 +0800
+++ b/hardware/nvidia/soc/t210/kernel-dts/tegra210-soc/tegra210-soc-base.dtsi     2020-08-31 08:41:45.223679918 +0800
@@ -351,7 +351,10 @@
                #interrupt-cells = <3>;
                interrupt-controller;
                reg = <0x0 0x50041000 0x0 0x1000
-                      0x0 0x50042000 0x0 0x0100>;
+                       0x0 0x50042000 0x0 0x2000
+                       0x0 0x50044000 0x0 0x2000
+                       0x0 0x50046000 0x0 0x2000>;
+               interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
                status = "disabled";
        };