system/qemu: Initial import

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+QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. 
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+QEMU has two operating modes: 
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+Full system emulation. In this mode, QEMU emulates a full system (for example a PC), including a processor and various peripherials. It can be used to launch different Operating Systems without rebooting the PC or to debug system code. 
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+User mode emulation (Linux host only). In this mode, QEMU can launch Linux processes compiled for one CPU on another CPU. 
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+An optional proprietary QEMU Accelerator Module (kqemu) is available to optimize the case where a PC is emulated on a PC. This module enables QEMU to run most of the target application code directly on the host processor to achieve near native performance.
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+This build of QEMU is built with support for kqemu.  To achieve this, the QEMU build process probes for current kernel path.  A different kernel path can be set by editing qemu.SlackBuild.  QEMU and kqemu should be built and used against the same kernel version.
+If you are not planning on using kqemu, you may edit the SlackBuild and remove the --enable-kqemu line if you wish.
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