Xen ARM with Virtualization Extensions/Salvator-X

General information

This wiki talks about Xen on Renesas Salvator-X board Salvator-X(Cortex-A57 quad core + Cortex-A53 quadcore, code name r8a7795).

Only core-image-minimal configuration are now supported

Setup

Follow setup are based & tested on official Renesas Yocto 2.12.0 release (https://github.com/renesas-rcar/meta-renesas/releases/tag/Renesas-Yocto-v2.12.0)

• Checkout on follow commits

   poky - 40376446904ae3529be41737fed9a0b650ed167d
   meta-linaro - 9b1fd178309544dff1f7453e796a9437125bc0d9
   meta-openembedded - 8ab04afbffb4bc5184cfe0655049de6f44269990
   meta-renesas - 522efd09043aa8af1eec01af2b9e025df424d9a5

• Clone some additional yocto layers are required

   meta-selinux - 4c75d9cbcf1d75043c7c5ab315aa383d9b227510
   meta-virtualizaion - 042425c1d98bdd7e44a62789bd03b375045266f5

• Clone meta-platform-xen repository in the same directory

   git clone https://github.com/qbeeukraine/meta-platform-xen.git -b 2.12/minimal

• Initialize yocto build environment

   source poky/oe-init-build-env

• Copy local.conf & bblayers.conf from supplied xen layer

   cp meta-platform-xen/meta-rcar-gen3-xen/docs/sample/conf/salvator-x/linaro-gcc/bsp/*.conf ./conf/

• Build yocto

   bitbake core-image-minimal

• Target images will be located in follow folder

   build/tmp/deploy/images/salvator-x-xen

BL2 & U-boot update procedure

Please reference to recent version of board manual for this procedure. Follow bootloaders should be updated:

1. BL2 bootloader - from on we leave bootloaders in EL2 mode
2. U-boot - don't disable SCIF clock & don't update memory nodes in DTS file

Check u-boot environment variables

Set follow configuration in u-boot command prompt.

   bootargs=dom0_mem=512M console=dtuart dtuart=serial0 dom0_max_vcpus=1 bootscrub=0 flask_enforcing=1
   bootcmd=tftp 0x78080000 xen-salvator-x-xen.uImage; tftp 0x738000000 Image-r8a7795-salvator-x-dom0.dtb; tftp 0x7a000000 Image; tftp 0x7c000000 xenpolicy-salvator-x-xen; bootm 0x78080000 - 0x738000000

Resources

Salvator-X elinux resource Board support patch series