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. Cheers, Andreas [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 [5] https://gem5-review.googlesource.com/#/admin/projects/arm/gem5,branches IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
