[PATCH 0/5] xen/x86: fix implementation of subpage r/o MMIO

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

Hello,

Following series include some bugfixes and improvements to the handling
of subpage r/o MMIO accesses.

First patch is a bugfix that applies to subpage accesses for both PV and
HVM.

Patch 2 introduces a helper to reduce code duplication when performing
MMIO accesses.

Patch 3 is a bugfix for using subpage in HVM guest, and patch 4 is an
optimization to only register the HVM subpage handler when needed.

Finally patch 5 moves some PV only code to a PV specific file.

Thanks, Roger.

Roger Pau Monne (5):
  x86/mm: account for the offset when performing subpage r/o MMIO access
  xen/io: provide helpers for multi size MMIO accesses
  x86/hvm: fix handling of accesses to partial r/o MMIO pages
  x86/hvm: only register the r/o subpage ops when needed
  x86/mm: move mmio_ro_emulated_write() to PV only file

 xen/arch/x86/hvm/emulate.c             |  47 +-----------
 xen/arch/x86/hvm/hvm.c                 |  90 +++++++++++++++++++---
 xen/arch/x86/hvm/vmsi.c                |  47 +-----------
 xen/arch/x86/include/asm/hvm/emulate.h |   1 -
 xen/arch/x86/include/asm/mm.h          |  21 ++---
 xen/arch/x86/mm.c                      | 102 ++++++-------------------
 xen/arch/x86/pv/ro-page-fault.c        |  34 +++++++++
 xen/drivers/vpci/msix.c                |  47 +-----------
 xen/include/xen/io.h                   |  63 +++++++++++++++
 9 files changed, 218 insertions(+), 234 deletions(-)
 create mode 100644 xen/include/xen/io.h

-- 
2.48.1