linux-kernel - arm64 Kernel build for qemu-system-aarch64 ?

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Message-ID: <CAOuPNLhDtRJDBnwuV1kQ47Zd9B00qh2bXDNQvh9tXfTyYqAWDQ@mail.gmail.com>
Date:   Fri, 22 Feb 2019 19:17:00 +0530
From:   Pintu Agarwal <pintu.ping@...il.com>
To:     open list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kernelnewbies@...nelnewbies.org
Subject: arm64 Kernel build for qemu-system-aarch64 ?

Hi All,

I want to build Linux Kernel 4.20 for arm64 and use it on qemu-arm64.
I see that there is a defconfig available in arch/arm64/configs/defconfig
But I am not sure whether it will work for qemu-arm64, and by default
which machine type is supported.

I already have working setup for qemu-arm for both versatile and
vexpress machine. There is already a defconfig available for these
under arch/arm.
So I can build the kernel for it.

But, whether these defconfig are supported for arm64 ?
If anybody have setup for qemu-arm64 kernel, please share the steps.
About rootfs, I am planning to use the arm32 version of busybox itself.

Thanks,
Pintu