Editing QEMU (section)

==Operating modes==
QEMU has multiple operating modes:<ref name="uVhFu3">{{cite web |title=About QEMU |url=https://qemu.readthedocs.io/en/master/about/index.html |website=qemu.readthedocs.io}}</ref>
* '''User-mode emulation.''' In the user emulation mode, QEMU runs single [[Linux]] or [[Darwin (operating system)|Darwin]]/[[macOS]] programs that were compiled for a different [[instruction set]]. [[System call]]s are [[thunk]]ed for [[endianness]] and for 32/64-bit mismatches. Fast [[cross-compilation]] and cross-debugging are the main targets for user-mode emulation.
* '''System emulation.''' In the system emulation mode, QEMU emulates a full computer system, including [[peripheral]]s. It can be used to provide virtual hosting of several virtual computers on a single computer. QEMU can boot many guest [[operating system]]s, including [[Linux]], [[Solaris (operating system)|Solaris]], [[Microsoft Windows]], [[DOS]], and [[BSD]];<ref name="yfwuu3">{{cite web |title=QEMU OS Support List |url=http://www.claunia.com/qemu/ |archive-url=https://web.archive.org/web/20140513145837/http://www.claunia.com/qemu/ |archive-date=2014-05-13 |access-date=2024-03-21 |website=www.claunia.com |postscript=. Frequent changes recorded in archive in years before going offline.}}</ref> it supports emulating several instruction sets, including [[x86]], [[x86-64]], [[MIPS architecture|MIPS]], [[ARMv7]], [[ARMv8]], [[PowerPC]], [[RISC-V]], [[SPARC]], [[ETRAX CRIS]] and [[MicroBlaze]].
* '''Hypervisor support.''' In the hypervisor support mode, QEMU either acts as a Virtual Machine Manager (VMM) or as a device emulation back-end for [[virtual machines]] running under a [[hypervisor]]. The most common is Linux's [[Kernel-based Virtual Machine|KVM]] but the project supports a number of hypervisors including [[Xen]], Apple's HVF, Windows' WHPX, and NetBSD's NVMM.<ref>{{cite web |title=Supported host architectures |url=https://qemu.readthedocs.io/en/v8.1.0/about/build-platforms.html#supported-host-architectures}}</ref>