Re: [Xen-devel] [PATCH][v2] Hybrid extension support in Xen

[Sheng Yang <sheng@xxxxxxxxxxxxxxx>]

On Tuesday 02 February 2010 22:00:47 Tim Deegan wrote:
> At 13:50 +0000 on 02 Feb (1265118605), Ian Campbell wrote:
> > I wonder if we could turn things around and have the guest pick some
> > pages and tell the hypervisor to put the grant table there, removing the
> > need to reserve any of the physical address space up front.
> 
> Yes; this is how all existing PV-on-HVM drivers work, using the
> grant-table hypercall.  I don't see the need to add another mechanism.

...Not quite understand. I think the PV-on-HVM drivers reserved the memory 
space in QEmu provided device's MMIO space, similar to what I did here(except 
reserved in BIOS)?...

-- 
regards
Yang, Sheng

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