Re: [Xen-devel] [Q] mfn_to_gmfn macro, log-dirty bitmap,

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 28/06/2010 14:40, "Min Lee" <min.lee@xxxxxxxxxx> wrote:

> I'm running 32bit PV-domu on 64bit xen&dom0 and I'm using
> XEN_DOMCTL_SHADOW_OP_PEEK to get log-dirty bitmap.
> First, I'm assuming this bitmap is indexed by gmfn, right? because we're
> passing p2m->size parameter to xen.
> Second, I have mfn (not gmfn) which I want to translate to gmfn so that I
> can correctly read corresponding bit in log-dirty bitmap. so I've tried
> mfn_to_gmfn() macro below but it doesn't seem to work. (always mfn==gmfn)
> Maybe because m2p table is not enabled?
> How can I properly do mfn_to_gmfn?

For a PV guest, GMFN and MFN are equivalent.

 -- Keir



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