Hi Everyone,


After updating the util/gen_arm_fs_files.py 
script to use the 4.14 kernel below, I updated the Dockerfile that generates 
the needed binaries for arm FS simulations here: 

I also created a release with up-to-date generated binaries that can be found 


Feel free to copy it to http://www.gem5.org/dist/current/arm/





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-----Original Message-----
From: Andreas Sandberg <andreas.sandb...@arm.com> 
Sent: Wednesday, March 7, 2018 11:26
To: gem5 Developer List <gem5-...@gem5.org>; gem5 users mailing list 
Subject: [gem5-dev] Linux 4.14 and 4.15 with gem5 patches now available for Arm


Hi Everyone,


I'm happy to announce that we have just completed testing of the gem5-specific 
patches for Linux 4.14 and 4.15. The new kernel sources can be downloaded from 
the gem5/v4.14 [1] and gem5/v4.15 branches in the arm/linux [3] project on 
Gerrit. Most users should prefer the 4.14 kernel as this is the latest LTS 
release of Linux. See the wiki [4] for build instructions.


The kernels comes with default configurations for Armv7 and Armv8 and has the 
same set of gem5-specific patches as the older 4.x kernels.

These patches add support for:


   * gem5's GICv2 extensions. This enables support for up to 255 CPUs if the 
gem5 extensions are enabled in the GIC (set gem5_extensions to True in your 
configuration script).

   * A virtual DRM connector. This makes it possible to use gem5's display 
models without a proper HDMI encoder model.

   * The custom FBIOGET_DMABUF IOCTL. This change is useful to avoid a CPU-side 
memcpy between the GPU's render buffer and the framebuffer for Android setups 
that using NoMali.

   * gem5's DVFS controller.

   * General gem5 instrumentation.


Additionally, the upstream 4.15 kernel includes support for the Arm Scalable 
Vector Extensions (SVE) that can be used with the beta implementation of SVE 
for gem5 [5].


Known issues:


  * Recent Linux kernels don't expose the task struct in thread_info.

This affects gem5's instrumentation. Some of the Streamline support in

gem5 likely needs to be updated to support new kernels.


If you need to post any new kernel changes, please make sure to post them to 
the gem5/v4.14 branch on gerrit.





[1]  <https://gem5.googlesource.com/arm/linux/+/refs/heads/gem5/v4.14> 

[2]  <https://gem5.googlesource.com/arm/linux/+/refs/heads/gem5/v4.15> 

[3]  <https://gem5-review.googlesource.com/#/admin/projects/arm/linux> 

[4]  <http://gem5.org/ARM_Kernel> http://gem5.org/ARM_Kernel

[5]  <https://gem5-review.googlesource.com/#/admin/projects/arm/gem5,branches> 

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