Xen ARM with Virtualization Extensions/Lager

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Revision as of 13:23, 15 October 2015 by MaxF (talk | contribs) (→‎Prepare Xen: Clarify on patches between xen stable-4.5 and stable-4.6 branches.)
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The Lager board based on Renesas R-Car H2 SoC is now supported in Xen upstream.

Prepare U-boot

Get u-boot sources

Clone sources from: git://git.denx.de/u-boot.git Checkout on commit, hash: f7ca1f7, net: sh-eth: Add cache writeback control after setting bit of DMA descriptor

Apply additional patches

Download archive with needed patches (renesas_uboot_patches.tar) from: [1]

Apply patches from renesas_uboot_patches.tar

Build u-boot

Build u-boot with "lager_xen_defconfig" configuration: 

# make lager_xen_defconfig ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
# make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-

Flash u-boot

Flash u-boot to QSPI as described in Start-Up Guide fot Renesas Lager board.

Check u-boot environment variables

bootargs=console=ttySC6,38400
bootcmd=tftp 0x70007fc0 xen-uImage;tftp 0x70f00000 uImage-r8a7790-lager.dtb;tftp 0x72000000 zImage-uImage;tftp 0x74000000 xenpolicy;bootm 0x70007fc0 – 0x70f00000

or just reset the configuration: 

env default -a -f
env set baudrate 38400
env set ethaddr 2e:09:0a:00:6d:c9
env set ipaddr 192.168.0.5
env set serverip 192.168.0.15
env set gatewayip 192.168.0.15
env set netmask 255.255.255.0
env set dnsip
env set dnsip2
env set hostname lager
env set bootargs console=ttySC6,38400
env set bootcmd tftp 0x70007fc0 xen-uImage\;tftp 0x70f00000 uImage-r8a7790-lager.dtb\;tftp 0x72000000 zImage-uImage\;tftp 0x74000000 xenpolicy\;bootm 0x70007fc0 - 0x70f00000
env save; reset

where:

  • xen-uImage – Xen image
  • uImage-r8a7790-lager.dtb – device tree blob
  • zImage-uImage – Dom0 kernel image
  • xenpolicy – Xen policy binary

Prepare Xen

Get Xen source

Clone sources from upstream: git://xenbits.xen.org/xen.git

Checkout on branch: stable-4.5 , and apply three patches from [xen-devel]: http://markmail.org/message/houjwx7vima3a53i

- OR -

Checkout on branch: stable-4.6 , where the above patches are already committed.


Configure Xen

# XEN_TARGET_ARCH=arm32 CROSS_COMPILE=arm-linux-gnueabihf- debug=y XSM_ENABLE=y CONFIG_EARLY_PRINTK=lager ./configure

Build Xen

Build Xen with command with earlyprintk support: 

# make xen XEN_TARGET_ARCH=arm32 CROSS_COMPILE=arm-linux-gnueabihf- debug=y XSM_ENABLE=y CONFIG_EARLY_PRINTK=lager

Build Xen with command without earlyprintk support: 

# make xen XEN_TARGET_ARCH=arm32 CROSS_COMPILE=arm-linux-gnueabihf- debug=y XSM_ENABLE=y

Make uImage for Xen

Make uImage for Xen with command: 

# mkimage -A arm -C none -T kernel -a 0x90000000 -e 0x90000000 -n "XEN" -d xen/xen xen-uImage

Build xenpolicy

Build xenpolicy binary: 

# make -C tools/flask/policy

Prepare Dom0 / Device Tree

(TBD)

Prepare other domains

(TBD)

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