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Document kvm

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Ciro Santilli
2018-03-09 03:57:42 +00:00
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README.adoc
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@@ -835,7 +835,7 @@ continue
This is of least reliable setup as there might be other processes that use the given virtual address. This is of least reliable setup as there might be other processes that use the given virtual address.
== Architecture == Architectures
The portability of the kernel and toolchains is amazing: change an option and most things magically work on completely different hardware. The portability of the kernel and toolchains is amazing: change an option and most things magically work on completely different hardware.
@@ -856,6 +856,23 @@ Debug:
Known quirks of the supported architectures are documented in this section. Known quirks of the supported architectures are documented in this section.
=== x86
You can make QEMU <<gem5-vs-qemu-performance,run faster>> by passing it the `-enable-kvm` option as in:
....
./run - -enable-kvm
....
This uses the link:https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine[KVM Linux kernel feature] of the host to run most instructions natively, and therefore.
There are several downsides to this however:
* only works for x86 guest
* limits visibility, since more things are running natively
So for those reasons we don't turn it on by default.
=== arm === arm
TODOs: TODOs: