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From: Mark Rutland <mark.rutland@arm.com>
To: Pintu Agarwal <pintu.ping@gmail.com>
Cc: linux-riscv@lists.infradead.org,
	open list <linux-kernel@vger.kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	kernelnewbies@kernelnewbies.org
Subject: Re: arm64 Kernel build for qemu-system-aarch64 ?
Date: Fri, 22 Feb 2019 14:10:59 +0000	[thread overview]
Message-ID: <20190222141059.GJ42419@lakrids.cambridge.arm.com> (raw)
In-Reply-To: <CAOuPNLhDtRJDBnwuV1kQ47Zd9B00qh2bXDNQvh9tXfTyYqAWDQ@mail.gmail.com>

On Fri, Feb 22, 2019 at 07:17:00PM +0530, Pintu Agarwal wrote:
> Hi All,

Hi,

> 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.

The arm64 defconfig is intended to work for all platforms.

I use that with qemu's '-machine virt'. Assuming you use virtio-net and
virtio-block, no additional drivers are required.

For example, I can boot a defconfig kernel using the followign QEMU options:

qemu-system-aarch64 \
        -m 2048 -smp 4 \
        -net nic \
        -net user,host=10.0.2.10,hostfwd=tcp::65022-:22 \
        -nographic \
        -no-reboot \
        -machine virt,accel=kvm,gic_version=host \
        -cpu host \
        -hda ${FILESYSTEM} \
        -snapshot \
        -kernel ${KERNEL} \
        -append "earlycon root=/dev/vda panic_on_warn"

Thanks,
Mark.

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  reply	other threads:[~2019-02-22 14:15 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-22 13:47 arm64 Kernel build for qemu-system-aarch64 ? Pintu Agarwal
2019-02-22 14:10 ` Mark Rutland [this message]
2019-02-22 16:50   ` Pintu Agarwal

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