Re: [Qemu-devel] [PATCH 0/9] Remove legacy unaligned bswap functions

["Michael S. Tsirkin" <mst@redhat.com>]

On Sun, Aug 25, 2013 at 03:59:28PM +0100, Peter Maydell wrote:
> The bswap.h header includes a set of "legacy unaligned functions"
> that (since commit c732a52d3 at the beginning of this year) are
> just wrappers for underlying {ld,st}<type> functions. The legacy
> functions aren't used in many places, so just replace all their
> uses with uses of the new-style {ld,st} functions; this lets us
> remove the legacy wrappers altogether.

I have a question on this: what happens if an unaligned
address is supplied?
In particular, if the address is supplied by the guest?

Esp the pci wrappers have many callers - were they all
audited?
I tried checking but there are many callers, will take
a while.

> Since we know the {ld,st}* routines are definitely functions,
> we can in the process remove some casts which were left over
> from when the legacy unaligned functions were previously macros.
> 
> The patchset is divided up by function being removed, rather
> than by which device/subsystem is being fixed; I think this way
> round is easier to review since you only have to keep one
> substitution in your head when reading a patch.
> 
> Peter Maydell (9):
>   bswap.h: Remove cpu_to_le16wu()
>   bswap.h: Remove cpu_to_le32wu()
>   bswap.h: Remove le16_to_cpupu()
>   bswap.h: Remove le32_to_cpupu()
>   bswap.h: Remove be32_to_cpupu()
>   bswap.h: Remove cpu_to_be16wu()
>   bswap.h: Remove cpu_to_be32wu()
>   bswap.h: Remove cpu_to_be64wu()
>   bswap.h: Remove cpu_to_32wu()
> 
>  block/qcow2-cluster.c     |    2 +-
>  hw/acpi/core.c            |    3 +--
>  hw/block/cdrom.c          |   10 +++++-----
>  hw/display/vga_template.h |   14 ++++++++------
>  hw/ide/atapi.c            |   16 +++++++--------
>  hw/net/e1000.c            |   22 +++++++++------------
>  hw/net/ne2000.c           |    4 ++--
>  hw/pci/pcie_aer.c         |    4 ++--
>  include/hw/pci/pci.h      |    8 ++++----
>  include/qemu/bswap.h      |   47 ---------------------------------------------
>  10 files changed, 40 insertions(+), 90 deletions(-)
> 
> -- 
> 1.7.9.5