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diff --git a/qemu-tech.texi b/qemu-tech.texi index be1c210678..2ab7cd4cc3 100644 --- a/qemu-tech.texi +++ b/qemu-tech.texi @@ -41,7 +41,6 @@ @chapter Introduction @menu -* intro_features:: Features * intro_x86_emulation:: x86 and x86-64 emulation * intro_arm_emulation:: ARM emulation * intro_mips_emulation:: MIPS emulation @@ -51,93 +50,6 @@ * intro_other_emulation:: Other CPU emulation @end menu -@node intro_features -@section Features - -QEMU is a FAST! processor emulator using a portable dynamic -translator. - -QEMU has two operating modes: - -@itemize @minus - -@item -Full system emulation. In this mode (full platform virtualization), -QEMU emulates a full system (usually a PC), including a processor and -various peripherals. It can be used to launch several different -Operating Systems at once without rebooting the host machine or to -debug system code. - -@item -User mode emulation. In this mode (application level virtualization), -QEMU can launch processes compiled for one CPU on another CPU, however -the Operating Systems must match. This can be used for example to ease -cross-compilation and cross-debugging. -@end itemize - -As QEMU requires no host kernel driver to run, it is very safe and -easy to use. - -QEMU generic features: - -@itemize - -@item User space only or full system emulation. - -@item Using dynamic translation to native code for reasonable speed. - -@item -Working on x86, x86_64 and PowerPC32/64 hosts. Being tested on ARM, -S390x, Sparc32 and Sparc64. - -@item Self-modifying code support. - -@item Precise exceptions support. - -@item -Floating point library supporting both full software emulation and -native host FPU instructions. - -@end itemize - -QEMU user mode emulation features: -@itemize -@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 - -Linux user emulator (Linux host only) can be used to launch the Wine -Windows API emulator (@url{http://www.winehq.org}). A BSD user emulator for BSD -hosts is under development. It would also be possible to develop a -similar user emulator for Solaris. - -QEMU full system emulation 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 some 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) even on a host with a single CPU. On a -SMP host system, QEMU can use only one CPU fully due to difficulty in -implementing atomic memory accesses efficiently. - -@end itemize - @node intro_x86_emulation @section x86 and x86-64 emulation |