| .. _QEMU-PC-System-emulator: | 
 |  | 
 | x86 System emulator | 
 | ------------------- | 
 |  | 
 | Board-specific documentation | 
 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | 
 |  | 
 | .. | 
 |    This table of contents should be kept sorted alphabetically | 
 |    by the title text of each file, which isn't the same ordering | 
 |    as an alphabetical sort by filename. | 
 |  | 
 | .. toctree:: | 
 |    :maxdepth: 1 | 
 |  | 
 |    i386/microvm | 
 |    i386/pc | 
 |  | 
 | Architectural features | 
 | ~~~~~~~~~~~~~~~~~~~~~~ | 
 |  | 
 | .. toctree:: | 
 |    :maxdepth: 1 | 
 |  | 
 |    i386/cpu | 
 |    i386/hyperv | 
 |    i386/xen | 
 |    i386/kvm-pv | 
 |    i386/sgx | 
 |    i386/amd-memory-encryption | 
 |  | 
 | OS requirements | 
 | ~~~~~~~~~~~~~~~ | 
 |  | 
 | On x86_64 hosts, the default set of CPU features enabled by the KVM | 
 | accelerator require the host to be running Linux v4.5 or newer. Red Hat | 
 | Enterprise Linux 7 is also supported, since the required | 
 | functionality was backported. |