Messages in this thread | | | Date | Wed, 16 Jul 2014 16:49:12 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v2 1/3] ACPI: ARM64 does not have a BIOS add config for BIOS table scan. |
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On 07/16/2014 04:46 PM, Luck, Tony wrote: >> + select ACPI_LEGACY_TABLES_LOOKUP if ACPI > >> This shouldn't actually be set on IA64, should it? IA64 doesn't have >> BIOS, either, it has EFI/UEFI, like ARM64... > > Which ACPI tables are in the "LEGACY" category affected by this option? >
That's not what this is about... it is about how you find the root pointer.
On a BIOS system it is found by scanning low memory. On an EFI system it is found by querying EFI for a specific UUID.
-hpa
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