From: Tang Chen <tangchen@cn.fujitsu.com>
Date: Wed, 24 Sep 2014 07:57:58 +0000 (+0800)
Subject: kvm: x86: Unpin and remove kvm_arch->apic_access_page
X-Git-Tag: fixes-for-v3.18-merge-window~23^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c24ae0dcd3e8695efa43e71704d1fc4bc7e29e9b;p=pandora-kernel.git

kvm: x86: Unpin and remove kvm_arch->apic_access_page

In order to make the APIC access page migratable, stop pinning it in
memory.

And because the APIC access page is not pinned in memory, we can
remove kvm_arch->apic_access_page.  When we need to write its
physical address into vmcs, we use gfn_to_page() to get its page
struct, which is needed to call page_to_phys(); the page is then
immediately unpinned.

Suggested-by: Gleb Natapov <gleb@kernel.org>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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