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    SubjectRe: [PATCH] x86: Allow MMCONFIG above 4GB on x86_64
    Date
    > 
    >
    > * John Keller <jpk@sgi.com> wrote:
    >
    > > SGI UV will have MMCFG base addresses that are greater than 4GB (32
    > > bits).
    >
    > > +++ linux-2.6/arch/x86/kernel/acpi/boot.c 2008-07-09 15:25:32.000000000 -0500
    > > @@ -200,6 +200,7 @@ int __init acpi_parse_mcfg(struct acpi_t
    > > }
    > >
    > > memcpy(pci_mmcfg_config, &mcfg[1], config_size);
    > > +#ifndef CONFIG_X86_64
    > > for (i = 0; i < pci_mmcfg_config_num; ++i) {
    > > if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
    > > printk(KERN_ERR PREFIX
    > > @@ -209,6 +210,7 @@ int __init acpi_parse_mcfg(struct acpi_t
    > > return -ENODEV;
    > > }
    > > }
    > > +#endif
    >
    > hm. If then it should be enabled very carefully and initially probably
    > on a per system (i.e. DMI driven whitelist) basis.
    >
    > Ingo

    I've also posted a revised patch that is platform specific.

    http://marc.info/?l=linux-acpi&m=121615159014404&w=2

    John


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