From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Wed, 26 May 2010 08:48:25 +0000 (+0800)
Subject: KVM: MMU: Calculate correct base gfn for direct non-DIR level
X-Git-Tag: v2.6.36-rc1~580^2~126
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9fa0b3bef9a0b117b3c3f958ec553c21f609a9f;p=pandora-kernel.git

KVM: MMU: Calculate correct base gfn for direct non-DIR level

In Document/kvm/mmu.txt:
  gfn:
    Either the guest page table containing the translations shadowed by this
    page, or the base page frame for linear translations. See role.direct.

But in __direct_map(), the base gfn calculation is incorrect,
it does not calculate correctly when level=3 or 4.

Fix by using PT64_LVL_ADDR_MASK() which accounts for all levels correctly.

Reported-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

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