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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 2.0.0.0 (X11/20070419) |
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
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