Messages in this thread | | | From | "Luck, Tony" <> | Subject | RE: [RFC 3/3] x86, mirror: x86 enabling - find mirrored memory ranges and tell memblock | Date | Mon, 18 May 2015 17:36:07 +0000 |
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On 2015/2/4 6:40, Tony Luck wrote: >> Can't post this part yet because it uses things in an upcoming[*] ACPI, UEFI, or some >> other four-letter-ending-in-I standard. So just imagine a call someplace early >> in startup that reads information about mirrored address ranges and does: >>
> Does the upcoming[*] ACPI will add a new flag in SRAT tables? just like memory hotplug. > > #define ACPI_SRAT_MEM_HOT_PLUGGABLE (1<<1) /* 01: Memory region is hot pluggable */ > +#define ACPI_SRAT_MEM_MIRROR (1<<3) /* 03: Memory region is mirrored */
The choice for this was UEFI - new attribute bit in the GetMemoryMap() return value.
UEFI 2.5 has been published with this change and I posted a newer patch 10 days ago:
https://lkml.org/lkml/2015/5/8/521
-Tony
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