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...t;mov $__HYPERVISOR_xxx,%eax int $0x82 " It is initialized in hypercall_page_initialise(void *hypercall_page) at the time when control panel creates the domain. Later, domain can simply the corresponding entry to issue a hypercall. For the subroutine of the HYPERVISOR_xxx, usually it is do_xxx. For example, __HYPERVISOR_sched_op should be do_sched_op. For more information, please refer to hypercall_table in xen/arch/x86/x86_{32,64}/entry.S. Thanks Ke T S wrote: > Hi, > > Can someone let me know what exactly the array "hypercall_page " > contains? Are they functio...