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Re: [Xen-devel] [v6][PATCH 2/2] xen:vtd: missing RMRR mapping while share EPT

On 2014/8/4 15:31, Jan Beulich wrote:
On 03.08.14 at 10:04, <tiejun.chen@xxxxxxxxx> wrote:
On 2014/8/1 21:47, Jan Beulich wrote:
I'm not sure - this may be an additional piece to be done for
consistency (if the domain builder doesn't already call this), but
since hvmloader doesn't appear to call XENMEM_memory_map it
won't do on its own I'm afraid.

Yes, current hvmloader can't do this on its own.

But in PV case, e820_host, seems be a refereed way to our goal. Even we
may reuse some codes here so its a convenient approach.

Only for those PV guests that actually care about e820_host. Non-
pvops Linux, for example, doesn't, but also has no problem with
the RMRR ranges overlapping with RAM due to the fully separated
M and P address spaces. The only issue here would be the risk of
assigning MMIO overlapping with them.

I will send a preliminary patches to cover this as RFC, please take a look at if this is good.


Additionally, I want to know if patch v6 is fine to be acked.

My position hasn't changed: I view this as correct but incomplete,
and hence not ready for inclusion. With - iirc - Tim being of a
different opinion, if you want to push for a decision without
supplying the missing pieces, see the section "Conflict Resolution"
on http://www.xenproject.org/governance.html. But of course
I'd much prefer to avoid having to fall back to this, and instead
have a complete patch set to commit within reasonable time.


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