Hi Peter,

On Wednesday, April 27, 2016, Peter Robinson <[email protected]> wrote:

> On Wed, Apr 27, 2016 at 1:18 PM, Chanho Park <[email protected]
> <javascript:;>> wrote:
> > Hi all,
> >
> > I want to use the armhf fedora rootfs on the aarch64 bit kernel.
>
> You can't, it's not a use case we support.
>
> Why not? All arm binaries can be runnable on aarch32 mode of aarch64
kernel.


> > When I ran the dnf command on the armhf image with aarch64 kernel, the
> > dnf command was failed with below error.
> >
> > dnf -v install mesa
> > cachedir: /var/cache/dnf
> > DNF version: 1.1.6
> > Failed to synchronize cache for repo 'rpmfusion-free-updates' from
> > '
> http://mirrors.rpmfusion.org/mirrorlist?repo=free-fedora-updates-released-22&arch=aarch64
> ':
> > Cannot prepare internal mirrorlist: No URLs in mirrorlist, disabling.
> > repo: using cache for: fedora
> > not found updateinfo for: Fedora 22 - aarch64
> > repo: using cache for: updates
> > not found deltainfo for: Fedora 22 - aarch64 - Updates
> > not found updateinfo for: Fedora 22 - aarch64 - Updates
> >
> > Actually, armhf binaries/rootfs can be executed even aarch64
> > kernel(fully compatible with armhf).
> > Maybe the dnf command tries to find its repo from uname call.
> > $ uname -m
> > aarch64
> >
> > The rpm install was also failed because fedora doesn't have any rpm
> > platform file
> > So, I added below file. It is able to install armhf rpm file even
> > aarch64 kernel.
> >
> > cat /etc/rpm/platform
> > armv7hl-fedora-linux-gnu
> >
> > The question is 'how can I run 'dnf' command on armhf fedora with
> > aarch64 kernel?'
>
> No, the ARMv7 and aarch64 ABI aren't compatible, the only way we
> support ARMv7 on aarch64 is via virtualisation. We will not be
> supporting this or a "multilib" usecase.


The aarch64 kernel can execute both aarch64 and aarch32(fully compatible
armv7) binaries. For example, the kernel of raspberry pi 3 is aarch64 and
fedora arm version can't run on rpi3. Even all binaries can run on it but
only dnf command can't do that.

Best Regards,
Chanho Park


-- 
Best Regards,
Chanho Park
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