Re: [Xen-devel] [PATCH v6 14/22] arm/acpi: Create min DT stub for Dom0

[Shannon Zhao <shannon.zhao@xxxxxxxxxx>]

On 2016年03月22日 09:07, Julien Grall wrote:
> 
>> +int __init arm_acpi_make_efi_nodes(void *fdt, struct membank tbl_add[])
> 
> It's odd to have this function in efi-dom0.c. We want to keep all the
> device tree creation together.
> 
We've discussed this before. We want to reuse the definition of EFI
struct, eg EFI_MEMORY_DESCRIPTOR here, so we add the file efi-dom.c to
place those functions because if we include the efi headers in
domain_build.c there are some type conflicts. That's the reason why we
add efi-dom0.c and place this function in it as well.

> Also, to stay consistent with the other name. Please rename the function
> into acpi_make_efi_nodes.
> 
>> +{
>> +    u64 fdt_val64;
>> +    u32 fdt_val32;
>> +    int desc_ver = 1;
>> +    int res;
>> +
>> +    res = fdt_begin_node(fdt, "uefi");
>> +    if ( res )
>> +        return res;
>> +
>> +    fdt_val64 = cpu_to_fdt64(tbl_add[TBL_EFIT].start);
>> +    res = fdt_property(fdt, "xen,uefi-system-table",
>> +                       &fdt_val64, sizeof(fdt_val64));
> 
> Those two lines could be replaced by fdt_property_u64.
> 
>> +    if ( res )
>> +        return res;
>> +
>> +    fdt_val64 = cpu_to_fdt64(tbl_add[TBL_MMAP].start);
>> +    res = fdt_property(fdt, "xen,uefi-mmap-start",
>> +                       &fdt_val64,  sizeof(fdt_val64));
> 
> Ditto
> 
>> +    if ( res )
>> +        return res;
>> +
>> +    fdt_val32 = cpu_to_fdt32(tbl_add[TBL_MMAP].size);
>> +    res = fdt_property(fdt, "xen,uefi-mmap-size",
>> +                       &fdt_val32,  sizeof(fdt_val32));
> 
> Here by fdt_property_u32.
> 
>> +    if ( res )
>> +        return res;
>> +
>> +    fdt_val32 = cpu_to_fdt32(sizeof(EFI_MEMORY_DESCRIPTOR));
>> +    res = fdt_property(fdt, "xen,uefi-mmap-desc-size",
>> +                         &fdt_val32, sizeof(fdt_val32));
> 
> Ditto
> 
>> +    if ( res )
>> +        return res;
>> +
>> +    fdt_val32 = cpu_to_fdt32(desc_ver);
>> +    res = fdt_property(fdt, "xen,uefi-mmap-desc-ver",
>> +                         &fdt_val32, sizeof(fdt_val32)); 

Thanks,
-- 
Shannon

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