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Message-ID: <3908561D78D1C84285E8C5FCA982C28F32A86CA0@ORSMSX114.amr.corp.intel.com> Date: Mon, 18 May 2015 17:36:07 +0000 From: "Luck, Tony" <tony.luck@...el.com> To: Xishi Qiu <qiuxishi@...wei.com> CC: Andrew Morton <akpm@...ux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Xiexiuqi <xiexiuqi@...wei.com>, Linux MM <linux-mm@...ck.org> Subject: RE: [RFC 3/3] x86, mirror: x86 enabling - find mirrored memory ranges and tell memblock 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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