[Xen-devel] [PATCH 0/4] x86/vvmx: correctly emulate VMREAD and VMWRITE

[Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>]

Currently, emulation of vmread and vmwrite for a guest leads to BUG()
in cases when actual VMREAD or VMWRITE ends up in VMfail due to invalid
arguments.  The goal of this patch series is to prevent the BUG() from
happening and report any kind of VMfail back to the guest, just like
it would be done by H/W.

Sergey Dyasli (4):
  x86/vmx: introduce __vmwrite_safe()
  x86/vmx: improve __vmread_safe()
  x86/vvmx: correctly emulate VMWRITE
  x86/vvmx: correctly emulate VMREAD

 tools/tests/x86_emulator/x86_emulate.h |  6 +++
 xen/arch/x86/hvm/vmx/vmcs.c            | 20 ++++++----
 xen/arch/x86/hvm/vmx/vvmx.c            | 46 +++++++++++++++++-----
 xen/arch/x86/x86_emulate/x86_emulate.c |  6 ---
 xen/include/asm-x86/hvm/vmx/vmcs.h     |  6 ++-
 xen/include/asm-x86/hvm/vmx/vmx.h      | 72 ++++++++++++++++++++++------------
 xen/include/asm-x86/hvm/vmx/vvmx.h     | 11 +++++-
 xen/include/xen/lib.h                  |  6 +++
 8 files changed, 123 insertions(+), 50 deletions(-)

-- 
2.7.4


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