[Qemu-devel] Re: [kvm-devel] PIIX/IDE: ports disabled in PCI config space?

[Avi Kivity]

Luca Tettamanti wrote:
> Hello,
> I'm testing the new Fedora7 under KVM. As you may know Fedora has
> migrated to the new libata drivers.
>
> ata_piix is unhappy with the PIIX IDE controller provided by QEmu/KVM:
>
>
>   

[...]

> The following patch fixes the problem (i.e. ata_piix finds both the HD
> and the cdrom):
>
> --- a/hw/ide.c  2007-06-04 19:34:25.000000000 +0200
> +++ b/hw/ide.c  2007-06-04 21:45:28.000000000 +0200
> @@ -2586,6 +2586,8 @@ static void piix3_reset(PCIIDEState *d)
>      pci_conf[0x06] = 0x80; /* FBC */
>      pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
>      pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
> +    pci_conf[0x41] = 0x80; // enable port 0
> +    pci_conf[0x43] = 0x80; // enable port 1
>  }
>  
>  void pci_piix_ide_init(PCIBus *bus, BlockDriverState **hd_table, int devfn)
>   

I imagine the reset state in the spec is disabled?  If so, then the 
long-term fix is to enable these bits in the bios.

In any case, I applied this to the kvm repo.  Thanks.

--
error compiling committee.c: too many arguments to function