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

On 2014/8/1 15:21, Jan Beulich wrote:
On 01.08.14 at 09:10, <tiejun.chen@xxxxxxxxx> wrote:
On 2014/8/1 14:51, Jan Beulich wrote:
On 31.07.14 at 11:45, <tiejun.chen@xxxxxxxxx> wrote:
Additionally, I'm trying to figure out that solution. As I mentioned
previously, I think we can reserve all RMRR once when a guest call
XENMEM_machine_memory_map to create its own memory. What about this
idea? Or other better suggestions?

I don't think any HVM guest would ever call this, even more so that
the call is restricted to Dom0. The reservation needs to be done

Thanks for your correction. Actually I'm also afraid I may not find a
correct place where I want to go indeed since I'm not familiar this

when guest memory gets populated (and its E820 constructed).

Could you hint me where this action is covered?

Memory population happens in tools/libxc/xc_hvm_build.c:setup_guest(),
the E820 for the guest gets constructed in hvmloader (just grep for

Thanks for your information.

With further looking into this, instead of XENMEM_machine_memory_map, I think we can go XENMEM_set_memory_map path, right?


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