Re: [Qemu-stable] [PATCH v2] memory: fix limiting of translation at a page boundary

[Mark Cave-Ayland]

On 07/02/14 14:47, Paolo Bonzini wrote:

> Commit 360e607 (address_space_translate: do not cross page boundaries,
> 2014-01-30) broke MMIO accesses in cases where the section is shorter
> than the full register width.  This can happen for example with the
> Bochs DISPI registers, which are 16 bits wide but have only a 1-byte
> long MemoryRegion (if you write to the "second byte" of the register
> your access is discarded; it doesn't write only to half of the register).
>
> Restrict the action of commit 360e607 to direct RAM accesses.  This
> is enough for Xen, since MMIO will not go through the mapcache.
>
> Reported-by: Mark Cave-Ayland<address@hidden>
> Cc: address@hidden
> Signed-off-by: Paolo Bonzini<address@hidden>

Hi Paolo,

Thanks for this - I can confirm that v2 fixes the qemu-system-ppc VGA 
issue for me :)

Tested-by: Mark Cave-Ayland <address@hidden>


ATB,

Mark.