[PATCH v3 0/4] 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.

Patch 1 introduces a helper to reduce code duplication when performing
MMIO accesses.

Patch 2 is a bugfix for using subpage in HVM guest, and patch 3 is an
optimization to only register the HVM subpage handler when needed.

Finally patch 4 moves some PV only code to a PV specific file.

Thanks, Roger.

Roger Pau Monne (4):
  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/Makefile              |   1 +
 xen/arch/x86/hvm/emulate.c             |  54 ++---------
 xen/arch/x86/hvm/hvm.c                 |  18 ++--
 xen/arch/x86/hvm/mmio.c                | 125 +++++++++++++++++++++++++
 xen/arch/x86/hvm/vmsi.c                |  47 +---------
 xen/arch/x86/include/asm/hvm/emulate.h |   1 -
 xen/arch/x86/include/asm/hvm/io.h      |   3 +
 xen/arch/x86/include/asm/mm.h          |  21 +++--
 xen/arch/x86/mm.c                      | 101 +++++---------------
 xen/arch/x86/pv/ro-page-fault.c        |  34 +++++++
 xen/drivers/vpci/msix.c                |  47 +---------
 xen/include/xen/io.h                   |  70 ++++++++++++++
 12 files changed, 289 insertions(+), 233 deletions(-)
 create mode 100644 xen/arch/x86/hvm/mmio.c
 create mode 100644 xen/include/xen/io.h

-- 
2.48.1