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SubjectRe: [PATCH -mm] MMCONFIG: Fix x86_64 ioremap base_address
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> Current workaround is the following (both of linus and -mm),
>
> if (pci_mmcfg_config_num == 1 &&
> cfg->pci_segment_group_number == 0 &&
> (cfg->start_bus_number | cfg->end_bus_number) == 0)
> /* Assume it can access 256M range */
>
> But, if the system has bus number 0 only, it's a correct table.
> We may need to detect the broken system. blacklist?

or just... not assume 256Mb but assume broken?

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Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

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