Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation

[Paolo Bonzini]

On 13/11/2014 19:16, Al Stone wrote:
>> > address@hidden ~]# cat /proc/ioports 
>> > [ ... ]
>> >   0600-063f : 0000:00:01.3
>> >     0600-0603 : ACPI PM1a_EVT_BLK
>> >     0604-0605 : ACPI PM1a_CNT_BLK
>> >     0608-060b : ACPI PM_TMR
>> >   0700-070f : 0000:00:01.3
>> >     0700-0707 : piix4_smbus
>> > [ ... ]
> So this is problematic: the PM1a_EVT_BLK and PM1a_CNT_BLK should not
> exist if hardware reduced mode ACPI is being used; the values in the
> FADT should be zero so there should be no ioports (see section 5.2.9
> of the ACPI spec).  If this is from an ARM platform, it _should_ be in
> hardware reduced mode.  QEMU will have to take that into account.

No, this is x86.  As mentioned elsewhere in the thread, we'd have to add
a GPIO controller (e.g. PL061) to mach-virt, to replace GPE.

Paolo