kvm: x86: Unpin and remove kvm_arch->apic_access_page
authorTang Chen <tangchen@cn.fujitsu.com>
Wed, 24 Sep 2014 07:57:58 +0000 (15:57 +0800)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 24 Sep 2014 12:08:01 +0000 (14:08 +0200)
commitc24ae0dcd3e8695efa43e71704d1fc4bc7e29e9b
tree9cd5baf0a56807097bebe6ccea30664e581c61ef
parent38b9917350cb2946e368ba684cfc33d1672f104e
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>
arch/x86/include/asm/kvm_host.h
arch/x86/kvm/vmx.c
arch/x86/kvm/x86.c