linux-kernel - Re: [PATCH 0/3] sparc: port to copy_thread_tls() and struct kernel_clone

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Message-ID: <20200517150123.sl36ug27gwnyz6gf@wittgenstein>
Date:   Sun, 17 May 2020 17:01:23 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     David Miller <davem@...emloft.net>
Cc:     arnd@...db.de, guoren@...nel.org, linux-csky@...r.kernel.org,
        linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH 0/3] sparc: port to copy_thread_tls() and struct
 kernel_clone_args

On Tue, May 12, 2020 at 01:06:33PM -0700, David Miller wrote:
> From: Christian Brauner <christian.brauner@...ntu.com>
> Date: Tue, 12 May 2020 19:15:24 +0200
> 
> > I've tested this series with qemu-system-sparc64 and a Debian Sid image
> > and it comes up no problem (Here's a little recording
> > https://asciinema.org/a/329510 ).
> 
> Can you show how you put this environment together and also what
> compilation tools you used?  Looks great.

Sorry for the delay. That mail somehow got lost in my inbox.

So in general, I used qemu-system-sparc64 which is available in Universe
with either Debian or Ubuntu and that's what I've been using as host
distro. So you need a 

deb http://us.archive.ubuntu.com/ubuntu/ <release-name> universe
deb-src http://us.archive.ubuntu.com/ubuntu/ <release-name> universe
deb http://us.archive.ubuntu.com/ubuntu/ <release-name>-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ <release-name>-updates universe

int /etc/apt/sources.list

So after this, you should be able to install

apt install qemu-system-sparc

Now we need an image and believe it or not there's a guy who lives in
Berlin too who builds Debian images for all crazy architectures. You can
download them from:

https://cdimage.debian.org/cdimage/ports/

They're built quite frequently. Sometimes you get unlucky because a new
kernel won't boot anymore then going a couple of months back usually
helps. So for this experiment I downloaded:

https://cdimage.debian.org/cdimage/ports/9.0/sparc64/iso-cd/debian-9.0-sparc64-NETINST-1.iso

then I did:

cd .local/share/qemu
truncate -s 15GB sparc64.img

And then to _install_:

qemu-system-sparc64 \
        -m 4096 \
  	-device virtio-blk-pci,bus=pciB,drive=hd \
  	-drive file=/home/brauner/Downloads/debian-9.0-sparc64-NETINST-1.iso,format=raw,if=ide,bus=1,unit=0,media=cdrom,readonly=on \
	-drive file=/home/brauner/.local/share/qemu/sparc64.img,format=raw,if=none,id=hd \
	-boot order=d \
        -net nic \
	-net user \
	-nographic \

Then the Debian install will run after it finishes you can boot with:

qemu-system-sparc64 \
	-name debian-unstable-sparc64 -machine sun4u,accel=tcg,usb=off -m 4096 \
	-smp 1,sockets=1,cores=1,threads=1 \
	-uuid ccd8b5c2-b8e4-4d5e-af19-9322cd8e55bf -rtc base=utc -no-reboot -no-shutdown \
	-boot strict=on \
	-drive file=/home/brauner/.local/share/qemu/sparc64.img,if=none,id=drive-ide0-0-1,format=raw,cache=none,aio=native \
	-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-1,id=ide0-0-1 \
	-msg timestamp=on -nographic

If the install isn't setting up the repos right and you can't install
stuff the correct url is:
http://ftp.ports.debian.org/debian-ports/
to put into sources.list

> 
> > This is the sparc specific bit and _if_ you agree with the changes here
> > it'd be nice if I could get your review, and if technically correct,
> > your ack so I can fold this into a larger series and move on to the next
> > arch.
> 
> With the delay slot instruction indentation fixed:
> 
> Acked-by: David S. Miller <davem@...emloft.net>

Thank you, Dave!
Christian