sysctl.physinfo.nr_cpus. This also avoids miscalculation of
sockets_per_node by Xen where the number of CPUs in the system is
clipped.
From: Elizabeth Kon <eak@us.ibm.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
xc has access to the page size for the platform and the Python layer does not,
so there was a hardcoded "/ 256" in there.
Rename the "memory" physinfo parameter to "total_memory", to match the usage
elsewhere.
Tidy the code generating the SXP for xm info.
Signed-off-by: Ewan Mellor <ewan@xensource.com>