On 01/13/16 17:16, Andrew Jones wrote:
> On Wed, Jan 13, 2016 at 10:54:17PM +0800, Shannon Zhao wrote:
>> When booting the VM with UEFI, UEFI takes ownership of the RTC hardware.
>> While UEFI can use libfdt to disable the RTC device node in the DTB that
>> it passes to the OS, it cannot modify AML. Therefore, we won't generate
>> the RTC ACPI device at all when using UEFI.
> 
> I think a condensed comment similar to this commit message would be nice
> in build_dsdt, or somewhere. We have a policy for mach-virt of generating
> ACPI for everything we generate DT. It'd be good if we documented all the
> divergences in order to avoid confusion. [...]

Good idea!

Thanks
Laszlo


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