KVM: x86 emulator: Handle wraparound in (cs_base + offset) when fetching insns

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Currently, setting a large (i.e. negative) base address for %cs does not work on
a 64-bit host. The "JOS" teaching operating system, used by MIT and other
universities, relies on such segments while bootstrapping its way to full
virtual memory management.

Signed-off-by: Nelson Elhage <nelhage@ksplice.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Nelson Elhage 2011-04-13 11:44:13 -04:00 • committed by Avi Kivity

parent 49704f2658

commit 0521e4c0bc

1 changed files with 4 additions and 1 deletions

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arch/x86/kvm/emulate.c

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