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Date: Mon, 22 Sep 2014 22:40:04 +0200
From: Laszlo Ersek <lersek@redhat.com>
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Subject: Re: [Qemu-devel] [edk2] OVMF, Q35 and USB keyboard/mouse
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To: edk2-devel@lists.sourceforge.net, "Gabriel L. Somlo" <gsomlo@gmail.com>
Cc: qemu-devel@nongnu.org

On 09/22/14 18:44, Paolo Bonzini wrote:
> Il 22/09/2014 00:43, Laszlo Ersek ha scritto:
>>   // Bus 0, Device 1, Function 0 - PCI to ISA Bridge
>>   //
>>   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x3c), 0x00);
>>   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x60), 0x0b); // LNKA routing target
>>   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x61), 0x0b); // LNKB routing target
>>   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x62), 0x0a); // LNKC routing target
>>   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x63), 0x0a); // LNKD routing target
>>
>> This is not appropriate for q35. See "ICH9 PCI to ISA irq remapping" in
>> qemu's "q35-acpi-dsdt.dsl" file, vs. "PIIX PCI to ISA irq remapping" in
>> "acpi-dsdt.dsl".
> 
> If I understand the DSDT right, the field is still at 0x60, but the
> bridge is now at 1f.0.  Right?  Also, LNKE-LNKH must be set at 0x68.
> 
> However, these are only used if OS X runs in PIC mode rather than APIC
> mode (see \_PIC).  Why should OS X be running in PIC mode?  So fixing
> the above is right to do, but may not be enough.

I agree completely. I mentioned this because of

dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKA] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKB] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKE] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKF] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKG] (IRQs 5 10 11) *0, disabled.
dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKH] (IRQs 5 10 11) *0, disabled.

Thanks,
Laszlo