[Xen-devel] [PATCH 0/6] HVM Emulation and trap injection fixes

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This series covers issues discovered during the analysis of XSAs 105 and 106.

Patch 1 makes fixes to the SYS{CALL,ENTER,EXIT} emulation
Patches 2-4 provide support to inject software events from the emulator
Patch 5 introduces HVM Forced Emulation Prefix support to aid testing
Patch 6 is misc cleanup to svm_inject_trap()

As part of developing the software event injection emulation (and reverse
engineering AMD's behaviour), I developed a unit test.

The unit test tests:
 * icebp (0xf1)
 * int $1 (0xcd 0x01)
 * int3 (0xcc)
 * int $3 (0xcd 0x03)

In the following setups:
 * Regular instruction
 * Regular instruction with a redundant addr32 (0x67) prefix
 * Forced emulation prefix
 * Forced eumation and redundant addr32 prefix

Under the following conditions:
 * Ring0, all perms ok
 * Ring0, descriptor not present
 * Ring3, all perms ok
 * Ring3, descriptor not present
 * Ring3, dpl=0

Verifying that the correct exception occurs with correct eip and error code
(when appropriate).

Given some TUITs I hope to upstream a framework for unit testing in this 
fashion.

Andrew Cooper (5):
  x86/emulate: Provide further information about software events
  x86/hvm: Don't discard the SW/HW event distinction from the emulator
  x86/emulate: Support for emulating software event injection
  x86/hvm: Forced Emulation Prefix for debug builds of Xen
  x86/svm: Misc cleanup

Jan Beulich (1):
  x86emul: fix SYSCALL/SYSENTER/SYSEXIT emulation

 docs/misc/xen-command-line.markdown    |   11 ++
 xen/arch/x86/hvm/emulate.c             |   50 ++++++--
 xen/arch/x86/hvm/hvm.c                 |    5 +
 xen/arch/x86/hvm/io.c                  |    2 +-
 xen/arch/x86/hvm/svm/svm.c             |   77 ++++++++++--
 xen/arch/x86/hvm/vmx/realmode.c        |   14 +--
 xen/arch/x86/hvm/vmx/vmx.c             |   18 ++-
 xen/arch/x86/mm.c                      |    2 +
 xen/arch/x86/mm/shadow/common.c        |    1 +
 xen/arch/x86/x86_emulate/x86_emulate.c |  203 +++++++++++++++++++++++---------
 xen/arch/x86/x86_emulate/x86_emulate.h |   19 +++
 xen/include/asm-x86/hvm/emulate.h      |    5 +-
 xen/include/asm-x86/hvm/hvm.h          |    5 +
 13 files changed, 326 insertions(+), 86 deletions(-)

-- 
1.7.10.4


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