virt/hyperv/overview.rst

6 enlightened guest on Microsoft's Hyper-V hypervisor.  Hyper-V
9 equivalent to KVM and QEMU, for example).  Guest VMs run in child
19 Linux Guest Communication with Hyper-V
24   some guest actions trap to Hyper-V.  Hyper-V emulates the action and
25   returns control to the guest.  This behavior is generally invisible
31   processor registers or in memory shared between the Linux guest and
38   the guest, and the Linux kernel can read or write these MSRs using
45   the Hyper-V host and the Linux guest.  It uses memory that is shared
46   between Hyper-V and the guest, along with various signaling
70 * Linux tells Hyper-V the guest physical address (GPA) of the
73   GPAs, which usually do not need to be contiguous in the guest
87 range of 4 Kbytes.  Since the Linux guest page size on x86/x64 is
88 also 4 Kbytes, the mapping from guest page to Hyper-V page is 1-to-1.
97 and the Linux guest are "overlay" pages.  With overlay pages, Linux
98 uses the usual approach of allocating guest memory and telling
101 original physical memory page is no longer accessible in the guest
108 and the guest page originally allocated by Linux becomes visible
116 guest VMs, so Linux code must individually revoke all sharing before
135 A Linux guest CPU may be taken offline using the normal Linux
152 All communication between Hyper-V and guest VMs uses Little-Endian
164 A Linux guest on Hyper-V outputs in dmesg the version of Hyper-V
169 via flags in synthetic MSRs that Hyper-V provides to the guest,
170 and the guest code tests these flags.
173 initial VMBus connection from the guest to Hyper-V. This version