Re: [Xen-devel] [PATCH 09/14] livepatch: Add per-function applied/reverted state tracking marker

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 22/08/2019 12:15, Wieczorkiewicz, Pawel wrote:
> > On 22. Aug 2019, at 12:43, Julien Grall <julien.grall@xxxxxxx 
> > <mailto:julien.grall@xxxxxxx>> wrote:
> > On 22/08/2019 11:20, Wieczorkiewicz, Pawel wrote:
> > > > Cross-compiler are nowadays widely available. So build testing your changes 
> > > > in common code would be the minimum.
> > > I wish it was that simple. Nevertheless, I will try to prepare an environment 
> > > to perform such builds.
> > Cross-compiling the hypervisor is really easy ;).
> >
> > 1) Download the cross-compiler tarball (here one [1]) and uncompress it. You 
> > can also install the one provided by your distro.
> > 2) Build Xen hypervisor. Here an example for arm64:
> >
> > 42sh> cd xen.git/xen
> > 42sh> make XEN_TARGET_ARCH=arm64 CROSS_COMPILER=<triplet>-
> >
> > In my case, I am using the Arm toolchain AArch64 GNU/Linux target 
> > (aarch64-linux-gnu). So the <triplet> would be aarch64-linux-gnu.
> > This is assuming you have the compilers binary in your PATH. If not, you can 
> > use give the full path:
> > CROSS_COMPILER=/opt/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/bin/aarch64-linux-gnu-
> Awesome! That really works (especially thanks for the [1] link… finally some 
> toolstack that works on my system).
> One change was needed: s/CROSS_COMPILER/CROSS_COMPILE/g
Oh yes, sorry for that. I didn't copy/paste for once.

> Thanks!
>
> Having this in a wiki would really help. Or have I missed it?
This is explained on the Xen on Arm wiki page [2]. But I have to admit the page 
is difficult to go through. I need to find some time to rework it.
Cheers,

> > [1] 
> > https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads
[2] 
https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Cross_Compiling

--
Julien Grall

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