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diff --git a/qemu-doc.texi b/qemu-doc.texi index f37fd3130e..9f75c9d4d1 100644 --- a/qemu-doc.texi +++ b/qemu-doc.texi @@ -57,65 +57,69 @@ QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed. +@cindex operating modes QEMU has two operating modes: @itemize -@cindex operating modes - -@item @cindex system emulation -Full system emulation. In this mode, QEMU emulates a full system (for +@item Full system emulation. In this mode, QEMU emulates a full system (for example a PC), including one or several processors and various peripherals. It can be used to launch different Operating Systems without rebooting the PC or to debug system code. -@item @cindex user mode emulation -User mode emulation. In this mode, QEMU can launch +@item User mode emulation. In this mode, QEMU can launch processes compiled for one CPU on another CPU. It can be used to launch the Wine Windows API emulator (@url{http://www.winehq.org}) or to ease cross-compilation and cross-debugging. @end itemize -QEMU can run without a host kernel driver and yet gives acceptable -performance. +QEMU has the following features: + +@itemize +@item QEMU can run without a host kernel driver and yet gives acceptable +performance. It uses dynamic translation to native code for reasonable speed, +with support for self-modifying code and precise exceptions. + +@item It is portable to several operating systems (GNU/Linux, *BSD, Mac OS X, +Windows) and architectures. + +@item It performs accurate software emulation of the FPU. +@end itemize -For system emulation, the following hardware targets are supported: +QEMU user mode emulation has the following features: @itemize -@cindex emulated target systems -@cindex supported target systems -@item PC (x86 or x86_64 processor) -@item ISA PC (old style PC without PCI bus) -@item PREP (PowerPC processor) -@item G3 Beige PowerMac (PowerPC processor) -@item Mac99 PowerMac (PowerPC processor, in progress) -@item Sun4m/Sun4c/Sun4d (32-bit Sparc processor) -@item Sun4u/Sun4v (64-bit Sparc processor, in progress) -@item Malta board (32-bit and 64-bit MIPS processors) -@item MIPS Magnum (64-bit MIPS processor) -@item ARM Integrator/CP (ARM) -@item ARM Versatile baseboard (ARM) -@item ARM RealView Emulation/Platform baseboard (ARM) -@item Spitz, Akita, Borzoi, Terrier and Tosa PDAs (PXA270 processor) -@item Luminary Micro LM3S811EVB (ARM Cortex-M3) -@item Luminary Micro LM3S6965EVB (ARM Cortex-M3) -@item Freescale MCF5208EVB (ColdFire V2). -@item Arnewsh MCF5206 evaluation board (ColdFire V2). -@item Palm Tungsten|E PDA (OMAP310 processor) -@item N800 and N810 tablets (OMAP2420 processor) -@item MusicPal (MV88W8618 ARM processor) -@item Gumstix "Connex" and "Verdex" motherboards (PXA255/270). -@item Siemens SX1 smartphone (OMAP310 processor) -@item AXIS-Devboard88 (CRISv32 ETRAX-FS). -@item Petalogix Spartan 3aDSP1800 MMU ref design (MicroBlaze). -@item Avnet LX60/LX110/LX200 boards (Xtensa) +@item Generic Linux system call converter, including most ioctls. + +@item clone() emulation using native CPU clone() to use Linux scheduler for threads. + +@item Accurate signal handling by remapping host signals to target signals. +@end itemize + +QEMU full system emulation has the following features: +@itemize +@item +QEMU uses a full software MMU for maximum portability. + +@item +QEMU can optionally use an in-kernel accelerator, like kvm. The accelerators +execute most of the guest code natively, while +continuing to emulate the rest of the machine. + +@item +Various hardware devices can be emulated and in some cases, host +devices (e.g. serial and parallel ports, USB, drives) can be used +transparently by the guest Operating System. Host device passthrough +can be used for talking to external physical peripherals (e.g. a +webcam, modem or tape drive). + +@item +Symmetric multiprocessing (SMP) support. Currently, an in-kernel +accelerator is required to use more than one host CPU for emulation. + @end itemize -@cindex supported user mode targets -For user emulation, x86 (32 and 64 bit), PowerPC (32 and 64 bit), -ARM, MIPS (32 bit only), Sparc (32 and 64 bit), -Alpha, ColdFire(m68k), CRISv32 and MicroBlaze CPUs are supported. @node Installation @chapter Installation |