[Xen-devel] [PATCH 0/3] x86/svm: virtual VMLOAD/VMSAVE

[brian.woods@xxxxxxx]

From: Brian Woods <brian.woods@xxxxxxx>

x86/svm: virtual VMLOAD/VMSAVE

On AMD family 17h server processors, there is a feature called virtual
VMLOAD/VMSAVE.  This allows a nested hypervisor to preform a VMLOAD or
VMSAVE without needing to be intercepted by the host hypervisor.
Virtual VMLOAD/VMSAVE requires the host hypervisor to be in long mode
and nested page tables to be enabled.  For more information about it
please see:

AMD64 Architecture Programmer’s Manual Volume 2: System Programming
http://support.amd.com/TechDocs/24593.pdf
Section: VMSAVE and VMLOAD Virtualization (Section 15.33.1)

This patch series adds support to check for and enable the virtual
VMLOAD/VMSAVE features if available.

Signed-off-by: Brian Woods <brian.woods@xxxxxxx>

Brian Woods (3):
  x86/svm: rename lbr control field in vmcb
  x86/svm: add virtual VMLOAD/VMSAVE feature definition
  x86/svm: add virtual VMLOAD/VMSAVE support

 xen/arch/x86/hvm/svm/nestedsvm.c        | 10 +++++-----
 xen/arch/x86/hvm/svm/svm.c              |  3 ++-
 xen/arch/x86/hvm/svm/svmdebug.c         |  2 ++
 xen/arch/x86/hvm/svm/vmcb.c             |  7 +++++++
 xen/include/asm-x86/hvm/svm/nestedsvm.h |  4 ++--
 xen/include/asm-x86/hvm/svm/svm.h       |  2 ++
 xen/include/asm-x86/hvm/svm/vmcb.h      |  7 ++++---
 7 files changed, 24 insertions(+), 11 deletions(-)

-- 
2.11.0


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