I finally resolved this issue after hunting around. The clue comes from
this page,
https://wiki.linaro.org/LEG/Engineering/Virtualization/Xen_ARM_Guide:
/chosen/module@1/reg should match bootwrapper model.lds.
>
Basically if I increase memory region for kernel, I should also update dts
file on /chosen/module@1/reg.
Here is what in model.xen.lds. As you can see, kernel area is increased to
14MB.
OUTPUT_FORMAT("elf64-littleaarch64")
OUTPUT_ARCH(aarch64)
TARGET(binary)
INPUT(./boot.xen.o)
INPUT(Xen)
INPUT(Image)
INPUT(./fdt.dtb)
SECTIONS
{
. = 0x8000;
.text : { boot.xen.o }
. = 0x8000 + 0xfff8;
mbox = .;
.mbox : { QUAD(0x0) }
. = 0x8000 + 0xE0;
xen = .;
.xen : { Xen }
. = 0x8000 + 0x8;
kernel = .;
.kernel : { Image }
. = 0x8000 + 0x0800;
dtb = .;
.dtb : { ./fdt.dtb }
.data : { *(.data) }
.bss : { *(.bss) }
}
And here is what in foundation-v8.dts for chosen:
chosen {
#address-cells = <0x1>;
#size-cells = <0x1>;
xen,xen-bootargs = "dom0_mem=512M dom0_max_vcpus=2
dtuart=serial0 conswitch=x loglvl=all guest_loglvl=all no-bootscrub";
module@1 {
compatible = "xen,linux-zimage",
"xen,multiboot-module";
reg = <0x8008 0xe0>;
bootargs = "earlyprintk=pl011,0x1c09
console=hvc0 root=/dev/vda2 debug rw";
};
};
Kernels can be any recent 4.x kernel from torvalds, stable or linaro trees.
Now move to on to boot kernel with initrd.
Jun
On Fri, Sep 16, 2016 at 2:44 PM, Jun Sun wrote:
>
> Hi, all,
>
> I have been following the instructions at https://wiki.linaro.org/
> LEG/Engineering/Virtualization/Xen_on_ARMv8_Foundation to build xen for
> arm64.
>
> When I tried to use the latest kernel instead of v3.13 as suggested, I
> failed when building boot-wrapped image. See below.
>
> ===
> jsun@ubuntu:~/work/xen/linaro-2014-guide/boot-wrapper-aarch64$ make
> CROSS_COMPILE=aarch64-linux-gnu- FDT_SRC=foundation-v8.dts xen-system.axf
> aarch64-linux-gnu-ld -o xen-system.axf --script=model.xen.lds
> aarch64-linux-gnu-ld: section .xen loaded at
> [80a0,80ac061f]
> overlaps section .kernel loaded at [8008,80c50dff]
> Makefile:78: recipe for target 'xen-system.axf' failed
> make: *** [xen-system.axf] Error 1
> ===
>
> Obviously the issue is that linker script gives about 8.5MB space for
> kernel which is too small. If I modify the linker script to give more space
> to kernel, the xen will halt during boot up right before Dom0 starts:
>
> ==
> (XEN) *** LOADING DOMAIN 0 ***
> (XEN) Loading kernel from boot module @ 8008
> (XEN) Allocating 1:1 mappings totalling 512MB for dom0:
> (XEN) BANK[0] 0x00a000-0x00c000 (512MB)
> (XEN) Grant table range: 0x00ffe0-0x00ffe5e000
> (XEN) Loading zImage from 8008 to a008-
> a088
> (XEN) Allocating PPI 16 for event channel interrupt
> (XEN) Loading dom0 DTB to 0xa800-0xa8000fe7
> (XEN) Std. Loglevel: All
> (XEN) Guest Loglevel: All
> (XEN) *** Serial input -> DOM0 (type 'CTRL-x' three times to switch input
> to Xen)
> (XEN) Freed 276kB init memory.
> ==
>
> Any pointers on the right way to get modern kernel working with xen on
> ARM64?
>
> Thanks.
>
> Jun
>
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