[PATCH for 4.5 v2 0/2] Improve "Emulation failed" error message

[Andrew Cooper <andrew.cooper3@citrix.com>]

After wanting to improve this error for a long time, I have encountered two
cases in the past 2 days where I have needed more information than it
provided, so have finally gotten around to fixing it.

Patch 1 introduces a "print hex buffer" custom %p format (compatible with the
Linux equivelent), while Patch 2 improves the error message.

Changes in v2:
 * Sort position of %*ph in document.  Introduce missing title for %pv.
 * Clip limit at 64 bytes rather than defaulting back to 0.
 * Don't emit a trailing space after the last byte of the hex buffer.
 * Reduce content of message for clarity.
 * Only identify 16/32/64 bit operating mode.  ???_guest_x86_mode() is
   currently insufficiently expressive to cover all operating modes.

Andrew Cooper (2):
  xen/vsprintf: Introduce %*ph extended format specifier for hex
    buffers
  x86/hvm: Improve "Emulation failed @" error messages

 docs/misc/printk-formats.txt      |    7 +++++++
 xen/arch/x86/hvm/emulate.c        |   34 +++++++++++++++++++++++++---------
 xen/arch/x86/hvm/io.c             |   11 +----------
 xen/arch/x86/hvm/vmx/realmode.c   |    9 +--------
 xen/common/vsprintf.c             |   27 +++++++++++++++++++++++++++
 xen/include/asm-x86/hvm/emulate.h |    3 +++
 6 files changed, 64 insertions(+), 27 deletions(-)

-- 
1.7.10.4