On 2016/6/7 19:05, Julien Grall wrote:
> Hello Shannon,
>
> On 31/05/16 06:02, Shannon Zhao wrote:
>> From: Shannon Zhao <shannon.z...@linaro.org>
>>
>> Currently it only needs ACPI table RSDP, XSDT, GTDT, MADT, FADT, DSDT
>> for ARM VM. So only add placeholders for them here.
>>
>> Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
>> ---
>> tools/libxc/include/xc_dom.h | 17 +++++++++++++++++
>> 1 file changed, 17 insertions(+)
>>
>> diff --git a/tools/libxc/include/xc_dom.h b/tools/libxc/include/xc_dom.h
>> index 6cb10c4..0fe54dd 100644
>> --- a/tools/libxc/include/xc_dom.h
>> +++ b/tools/libxc/include/xc_dom.h
>> @@ -56,6 +56,20 @@ struct xc_dom_phys {
>> xen_pfn_t count;
>> };
>>
>> +struct acpitable {
>> + void *table;
>> + size_t size;
>> +};
>> +
>> +struct acpitable_blob {
>> + struct acpitable rsdp;
>> + struct acpitable xsdt;
>> + struct acpitable gtdt;
>> + struct acpitable madt;
>> + struct acpitable fadt;
>> + struct acpitable dsdt;
>> +};
>
> Is there any particular reason to expose the list of the tables outside
> of the building code?
>
> I would provide a single buffer with all the tables inside. Similar to
> what you did for building the tables in the hypervisor.
When it loads these tables to guest memory space, it needs to update the
entries (pointing to other tables) of XSDT and also the
xsdt_physical_address in RSDP.
So it needs to know the length of each table and copy them separately.
Please see patch 14.
Thanks,
--
Shannon
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