[Xen-devel] What does guest_walk_tables() do?

["K.C. Lee" <kcl.joseph@xxxxxxxxx>]

Hi,

I found that the prototype of guest_walk_tables is different in xen 3.1.0 and xen 3.4.3 and have some problems.

xen 3.1.0: guest_walk_tables(struct vcpu *v, unsigned long va, walk_t *gw, int guest_op)
defined in xen/arch/x86/mm/shadow/multi.c

guest_walk_tables(struct vcpu *v, unsigned long va, walk_t*gw,
                  uint32_t pfec, mfn_t top_mfn, void *top_map)
defined in xen/arch/x86/mm/guest_walk.c

What is guest_walk_tables used for? And what is the value pfec, top_mfn, top_map used for in xen 3.4.3?
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