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

From: Avi Kivity
Subject: [Qemu-devel] Re: [kvm-devel] PIIX/IDE: ports disabled in PCI config space?
Date: Tue, 05 Jun 2007 14:52:38 +0300
User-agent: Thunderbird (X11/20070419)

Luca Tettamanti wrote:
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

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