Re: [PATCH] arm64: xen_boot: Fix xen boot using Grub on AARCH64

[Fu Wei <fu.wei@linaro.org>]

Hi all

On 22 February 2016 at 17:29, Fu Wei <fu.wei@linaro.org> wrote:
> Hi Julien,
>
> On 20 February 2016 at 00:28, Julien Grall <julien.grall@linaro.org> wrote:
>> Xen is currently crashing because of malformed compatible property for
>> the boot module. This is because the property string is not
>> null-terminated as requested by the ePAR spec.
>> ---
>>  grub-core/loader/arm64/xen_boot.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/grub-core/loader/arm64/xen_boot.c b/grub-core/loader/arm64/xen_boot.c
>> index a914eb8..8ae43d7 100644
>> --- a/grub-core/loader/arm64/xen_boot.c
>> +++ b/grub-core/loader/arm64/xen_boot.c
>> @@ -156,7 +156,7 @@ prepare_xen_module_params (struct xen_boot_binary *module, void *xen_boot_fdt)
>>        grub_fdt_add_subnode (xen_boot_fdt, chosen_node, module_name);
>>
>>    retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "compatible",
>> -                             MODULE_CUSTOM_COMPATIBLE, sizeof(MODULE_CUSTOM_COMPATIBLE) - 1);
>> +                             MODULE_CUSTOM_COMPATIBLE, sizeof(MODULE_CUSTOM_COMPATIBLE));
>>    if (retval)
>>      return grub_error (GRUB_ERR_IO, "failed to update FDT");
>>
>> --
>> 1.9.1
>
> I have tested it. yes, xen will crash without this patch.
> Tested-by: Fu Wei <fu.wei@linaro.org>

I guess this bugfix haven't been merged yet,
Hope this fix can be merged soon :-)

>
> BTW, since Vladimir has simplified the xen boot code , and Now Xen
> distinguishes modules by order.
> ------
> menuentry 'Foundation Model Xen test with initramfs' {
>     xen_hypervisor /xen -- no-bootscrub console=dtuart conswitch=x
> dtuart=serial0 dom0_mem=512M dom0_max_vcpus=2
>     xen_module /dom0_kernel_Image console=hvc0 root=/dev/ram0 ro
>     xen_module /dom0_initramfs.cpio
>     xen_module /xsm
>     devicetree /fvp-base-gicv2-psci.dtb
> }
> -----
>
> Maybe we should update doc to  coordinate with this change.
>
> And another problem is: How does XEN identify XSM?
> Test with the config file above, I got "(XEN) MODULE[3]:
> 00000008fabb4000 - 00000008fabb65e7 Unknown"
>
> Please correct me if I miss something.
>
>
>>
>
>
>
> --
> Best regards,
>
> Fu Wei
> Software Engineer
> Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
> Ph: +86 21 61221326(direct)
> Ph: +86 186 2020 4684 (mobile)
> Room 1512, Regus One Corporate Avenue,Level 15,
> One Corporate Avenue,222 Hubin Road,Huangpu District,
> Shanghai,China 200021



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat