Re: 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved

[Barry Scott <barry.scott@onelan.co.uk>]

Barry Scott wrote:
> I'm trying to boot 2.6.17-rc6 with Mismatched section patches applied.
>
> On my HP dc7600U the last messages printed are:
>
> PCI: BUIS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG
>
> Googling I found a message about a IBM laptop reporting this message
> but that it did go on to boot. THere was a suggestion that the test 
> should be
> removed. I commented out the code and I can boot further.
>
> Here is the code I patched.
>
> --- arch/i386/pci/mmconfig.c~   2006-06-15 13:04:58.000000000 +0100
> +++ arch/i386/pci/mmconfig.c    2006-06-15 13:04:58.000000000 +0100
> @@ -194,17 +194,19 @@
>        if ((pci_mmcfg_config_num == 0) ||
>            (pci_mmcfg_config == NULL) ||
>            (pci_mmcfg_config[0].base_address == 0))
>                return;
>
> +/* qqq
>        if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
>                        pci_mmcfg_config[0].base_address + 
> MMCONFIG_APER_SIZE,
>                        E820_RESERVED)) {
>                printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not 
> E820-reserved\n");
>                printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
>                return;
>        }
> +qqq */
>
>        printk(KERN_INFO "PCI: Using MMCONFIG\n");
>        raw_pci_ops = &pci_mmcfg;
>        pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
>
> Barry
>
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Chuck Ebbert's MMCONFIG patch fixes this problem for me.

Barry