[Xen-devel] [PATCH 0/2] xen: modify dom0 interface for obtaining memory map

[Juergen Gross <jgross@xxxxxxxx>]

Today's interface to get the machine memory map in dom0 requires to
know in advance how large the final map will be. There is however no
way to either get only a part of the memory map or to ask the
hypervisor about its size.

This patch set enhances the XENMEM_machine_memory_map hypercall to
solve both issues by returning only a partial memory map in case the
supplied buffer was too small and to return the needed number of
entries if no buffer is being supplied.

Juergen Gross (2):
  xen/x86: return partial memory map in case of not enough space
  xen/x86: add a way to obtain the needed number of memory map entries

 xen/arch/x86/mm.c           | 52 +++++++++++++++++++++++++++------------------
 xen/include/public/memory.h |  4 ++++
 2 files changed, 35 insertions(+), 21 deletions(-)

-- 
2.10.2


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