KVM: x86 emulator: fix xchg instruction emulation

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If the destination is a memory operand and the memory cannot
map to a valid page, the xchg instruction emulation and locked
instruction will not work on io regions and stuck in endless
loop. We should emulate exchange as write to fix it.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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Wei Yongjun 2010-07-15 08:51:58 +08:00 • committed by Avi Kivity

parent 9195c4da26

commit c19b8bd60e

1 changed files with 4 additions and 0 deletions

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arch/x86/kvm/x86.c

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