Re: [Qemu-devel] [PATCH v4 4/5] acpi: arm: add fw_cfg device node to dsdt

[Peter Maydell]

On 1 October 2015 at 13:35, Laszlo Ersek <address@hidden> wrote:
> On 10/01/15 14:22, Gabriel L. Somlo wrote:
>> I'm noticing that even on 32-bit arm there are ACPI tables generated and
>> inserted into fw_cfg, so is there any reason OTHER than lack of firmware
>> support for ACPI not being supported on 32-bit arm ?

This is mostly just that we didn't bother to suppress them for
32-bit boots, though they're useless there.

> I think Ard was speaking about the guest kernel (his pointer certainly
> looks like a kernel repo). With regard to firmware, edk2's
> ArmVirtPkg/ArmVirtQemu.dsc builds just fine for 32-bit ARM guests.
>
> So, it's not a QEMU or guest firmware problem; I think it's a guest
> kernel problem.

Only if you think ACPI support is a requirement. It's not for 32-bit;
there's no compelling reason to implement it there.

thanks
-- PMM