From: Scott Wood <scottwood@freescale.com>
Date: Tue, 14 Jun 2011 23:34:39 +0000 (-0500)
Subject: KVM: PPC: e500: Support large page mappings of PFNMAP vmas.
X-Git-Tag: v3.1-rc1~264^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9973d54eeafcd1c3a2e89f0f59280c4c1e03e73b;p=pandora-kernel.git

KVM: PPC: e500: Support large page mappings of PFNMAP vmas.

This allows large pages to be used on guest mappings backed by things like
/dev/mem, resulting in a significant speedup when guest memory
is mapped this way (it's useful for directly-assigned MMIO, too).

This is not a substitute for hugetlbfs integration, but is useful for
configurations where devices are directly assigned on chips without an
IOMMU -- in these cases, we need guest physical and true physical to
match, and be contiguous, so static reservation and mapping via /dev/mem
is the most straightforward way to set things up.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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