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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
