Re: [Xen-devel] [PATCH qemu-traditional] ioreq: Support 32-bit default_ioport_* accesses

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.05.16 at 17:36, <boris.ostrovsky@xxxxxxxxxx> wrote:
> This is what the spec says:
> 
> AccessSize evaluates to an 8-bit integer that specifies the size of data
> values used when accessing the
> address space as follows:
> 0 - Undefined (legacy)
> 1 - Byte access
> 2 - Word access
> 3 - DWord access
> 4 - QWord access
> The 8-bit field DescriptorName . _ASZ is automatically created in order
> to refer to this portion of the
> resource descriptor. See _ASZ (page 368) for more information. For
> backwards compatibility, the
> AccesSize parameter is optional when invoking the Register macro. If the
> AccessSize parameter is
> not supplied then the AccessSize field will be set to zero. In this
> case, OSPM will assume the access
> size.
> 
> I don't think I understand what the last sentence means. Does it imply
> that SW can do whatever it thinks is appropriate?

I think so, yes.

Jan


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