Re: [Xen-devel] [PATCH] qemu: define a TOM register to report the base of PCI

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.02.13 at 16:37, "Hao, Xudong" <xudong.hao@xxxxxxxxx> wrote:
>> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
>> And then again, wasting 4 bytes of config space on something that
>> one ought to be allowed to expect to be at least 64k-aligned seems
>> questionable too. hvmloader surely could align the value up to the
>> next 64k boundary before writing the - then only word size - field.
> Hvmloader did 64k-aligned, I'm not quite understand, could you help to point 
> out?
> 
> If considering wasting of config space, actually hvmloader only write 4 
> values in this register: 3.75G(0xf0000000), 3.5G(0xe0000000), 3G(0xc0000000), 
> 2G(0x80000000), then 1 byte is enough for xen. 

I'd be fine with that too, but whether use 16M granularity here is
acceptable going forward I don't know.

Jan


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