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

[Michael S. Tsirkin]

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.

-- 
MST