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readme: document gem5 kvm failure error message

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Ciro Santilli
2018-04-05 09:59:45 +01:00
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README.adoc
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@@ -1210,7 +1210,11 @@ You can make QEMU or gem5 <<gem5-vs-qemu-performance,run faster>> by passing ena
./run -K
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but it was broken in gem5 with pending patches: https://www.mail-archive.com/gem5-users@gem5.org/msg15046.html
but it was broken in gem5 with pending patches: https://www.mail-archive.com/gem5-users@gem5.org/msg15046.html It fails immediately on:
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panic: KVM: Failed to enter virtualized mode (hw reason: 0x80000021)
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KVM uses the link:https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine[KVM Linux kernel feature] of the host to run most instructions natively.