[Xen-devel] [PATCH] Enable EPT (Extended PageTable)

["Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx>]

The patch attached enables the EPT feature. When present, it provides a

direct mechanism to virtualize physical memory in HVM guests running on

processors with Intel(c) Virtualization Technology.

 

We now use the EPT page table as P2M (guest physical to machine

mapping), removing the linear page table when EPT is used for the domain

(see the new file p2m-ept.c). We did this by adding three operations in

the p2m_domain. If VT-d is enabled, the EPT page table will be used as

the VT-d page table as well (i.e. shared).

 

b/xen/arch/x86/mm/hap/p2m-ept.c    |  197 +++++++++++++++++++++++++++++++++++++

 tools/firmware/hvmloader/config.h  |    2

 tools/libxc/xc_hvm_build.c         |   15 ++

 xen/arch/x86/hvm/hvm.c             |   15 ++

 xen/arch/x86/hvm/vmx/vmcs.c        |   63 ++++++++++-

 xen/arch/x86/hvm/vmx/vmx.c         |  163 +++++++++++++++++++++++++++---

 xen/arch/x86/mm/hap/Makefile       |    1

 xen/arch/x86/mm/p2m.c              |   24 +++-

 xen/include/asm-x86/domain.h       |   26 ++++

 xen/include/asm-x86/hvm/domain.h   |    2

 xen/include/asm-x86/hvm/hvm.h      |    9 +

 xen/include/asm-x86/hvm/vmx/vmcs.h |   35 ++++++

 xen/include/asm-x86/hvm/vmx/vmx.h  |   71 ++++++++++++-

 xen/include/asm-x86/p2m.h          |   37 ++----

 xen/include/public/hvm/params.h    |    3

 15 files changed, 606 insertions(+), 57 deletions(-)

 

Signed-off-by: Xin Li xin.b.li@xxxxxxxxx

Signed-off-by: Jun Nakajima jun.nakajima@xxxxxxxxx

Signed-off-by: Xiaohui Xin <Xiaohui.xin@xxxxxxxxx>

 

ept.patch
Description: ept.patch

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