Re: [Qemu-devel] [edk2] OVMF, Q35 and USB keyboard/mouse

[Paolo Bonzini]

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.

Paolo