[XenPPC] basic Xen achitecture question

["Yoder Stuart-B08248" <stuart.yoder@xxxxxxxxxxxxx>]

I'm trying to understand the paravirtualization interface
between the OS and Xen.  Here is one thing that's confusing
me--

In Linux, the xen probe() routine calls hpte_init_lpar()
which hooks up some pseries hypervisor MMU routines. These
translate into a plpar_hcall_norets() invocation, but
using pSeries hypervisor opcodes (e.g. H_PUT_TCE).

Related to that I don't see the mmu_update hypercall
used in Linux.

How do the MMU related hypercalls work?

Thanks,
Stuart

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