Re: [PATCH part4 2/4] x86, acpica, acpi: Try to find if SRAT is overridedearlier.

[Tang Chen]

On 08/09/2013 12:29 AM, Yinghai Lu wrote:
......
> Please check if you can reuse first half of my patchset, so find and copy
> override table earlier. the copied acpi tables could be near kernel code range.

I don't think we need to do the finding step at that early time, in
head64.c stage.

Before pagetables are setup, we can use early_ioremap() to map the
memory we want to access. We don't need to use phys addr. We can do
it in setup_arch(), which has nothing to do with 32bit or 64bit.

> Move finding in head64.c stage could help xen/dom0 a bit.
> as Konrad is working on patchset with acpi override in xen hypervisor.
> We can avoid override acpi table two times. Esp xen like to change
> DMAR to XMAR.

Would you please give some more info about this, and explain why finding
override tables in head64.c stage is helpful for xen ?

Thanks.

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