Re: [Qemu-devel] [PATCH RFC] acpi: add reset register to fadt

[Laszlo Ersek]

On 01/31/17 19:17, Michael S. Tsirkin wrote:
> On Tue, Jan 31, 2017 at 05:28:57PM +0100, Laszlo Ersek wrote:
>> The ACPI 6.1 spec says,
>>
>> - DSDT: [...] If the X_DSDT field contains a non-zero value then this
>>   field must be zero.
>> - X_DSDT: [...] If the DSDT field contains a non-zero value then this
>>   field must be zero.
> 
> But that's only 6.1. 6.0 and earlier did not say this.
> The errata they wanted to address was:
> 1393 In FADT: if X_DSDT field is non-zero, DSDT
> field should be ignored or deprecated
> 
> I would class this as a spec bug.
> 

Process-wise, that's not a bad idea; it could be the only way (or the
best way) to argue for a corresponding change in edk2's
EFI_ACPI_TABLE_PROTOCOL implementation
(MdeModulePkg/Universal/Acpi/AcpiTableDxe).

Do you want to raise this on the ASWG list? I vaguely recall that you
subscribed; if not, I think you should be able to, as a Red Hatter
<http://members.uefi.org/kmembership_info/person_signup/>.

(I'd like to avoid being the middle man.)

Hm... It seems that the "Adopter Membership" is free, which could be
appropriate for individual observers:

http://uefi.org/join
http://members.uefi.org/home/

(Should Phil consider it.)

Thanks
Laszlo