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xen-devel
Re: [Xen-devel] Re: [PATCH]: Allow tools to map arbitrarily large machph
>>> On 15.03.11 at 16:00, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> wrote:
> On Mon, 2011-03-14 at 16:58 +0000, Jan Beulich wrote:
>> >>> On 14.03.11 at 17:33, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> wrote:
>> > paging_init seems to do the right thing and setup the compat M2P up to a
>> > maximum of RDWR_COMPAT_MPT_VIRT_END.
>>
>> With 1Gb being the theoretical limit of what a 32-bit guest can
>> see and access, that's all a guest could ever sensibly ask for (a
>> [hypothetical] domain could ask for having a larger than the
>> default hole with more of the table mapped in).
>
> The size of a domain's hypervisor hole and how much of the m2p it can
> map via XENMEM_machphys_mfn_list have no relationship though -- that's
> the point of this change.
I understand that (now) - I was just trying to explain why things
were coded to setup the full range, but expose only what would
be visible through the hole.
Jan
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