[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [v3][PATCH 1/1] xen:vtd: missing RMRR mapping while share EPT
At 09:02 +0100 on 25 Jul (1406275321), Jan Beulich wrote: > >>> On 25.07.14 at 09:53, <tiejun.chen@xxxxxxxxx> wrote: > > Such this kind of problem just happens in shared EPT case, right? In > > non-shared EPT case, we don't create these EPT tables to override other > > EPTs, so its okay? > > At least I think/hope it is okay in the non-shared case - there's still > the problem of the two translation tables not being consistent with > one another, but I can't currently see problems arising from that. It's _not_ OK in the non-shared case: if a guest has RAM at that address and uses a passed-through device to DMA to it, the DMA will end up in the RMRR area. Add we know that this guest has at least one passed-through device. :P Tim. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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