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37 .Nm vmm_guest_sync_addr
38 .Nd enter VMM mode / sync VMM threads
44 .Fn vmm_guest_ctl "int op" "struct vmm_guest_options *options"
46 .Fn vmm_guest_sync_addr "long *dstaddr" "long *srcaddr"
48 In order to run a virtual machine on top of the host operating system, two
49 sets of page tables are needed (one each for the host and guest).
50 Older CPUs supports only one level of page tables and the second level had
51 to be emulated in software.
52 Modern CPUs have support for a second level of page table translations,
61 functions bring the guest virtual machine into a state in which
62 the hardware is able to walk two levels of page tables.
66 currently supported by
70 which bootstraps the calling process as a VMM process running with
71 extended/nested page table support (two layers of page tables).
78 .Fn vmm_guest_sync_addr
79 function copies the content of
83 synchronizing with all CPUs which are in VMM mode (i.e., all CPUs will see
91 .Fn vmm_guest_sync_addr
92 system calls were added in