Re: [Xen-devel] [PATCH 0/2] QEMU/xen: simplify cpu_ioreq_pio and cpu_ioreq_move

["Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>]

Hi Stefano,

Is these patches merged with Xen 4.2? I didn't see them in the upstream.
The uint/int fix is critical to fix the nested guest boot issue.

Thanks,
Dongxiao

> -----Original Message-----
> From: Stefano Stabellini [mailto:stefano.stabellini@xxxxxxxxxxxxx]
> Sent: Tuesday, September 11, 2012 2:05 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: Xu, Dongxiao; Ian Jackson; qemu-devel@xxxxxxxxxx; Stefano Stabellini
> Subject: [PATCH 0/2] QEMU/xen: simplify cpu_ioreq_pio and cpu_ioreq_move
> 
> Hi all,
> after reviewing the patch "fix multiply issue for int and uint types"
> with Ian Jackson, we realized that cpu_ioreq_pio and cpu_ioreq_move are in
> much need for a simplification as well as removal of a possible integer 
> overflow.
> 
> This patch series tries to accomplish both switching to two new helper
> functions and using a more obvious arithmetic. Doing so it should also fix the
> original problem that Dongxiao was experiencing. The C language can be a
> nasty backstabber when signed and unsigned integers are involved.
> 
> The current patch series if for qemu-xen-traditional but if the patches are
> deemed correct I'll submit an equivalent set for QEMU upstream (with the
> appropriate code style changes).
> 
> 
> 
> Stefano Stabellini (2):
>       i should be uint32_t rather than int
>       introduce read_physical_offset and write_physical_offset
> 
>  i386-dm/helper2.c |   66
> +++++++++++++++++++++++++++++++++-------------------
>  1 files changed, 42 insertions(+), 24 deletions(-)
> 
> 
> 
> Cheers,
> 
> Stefano

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