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authorXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>2012-08-21 10:57:42 +0800
committerAvi Kivity <avi@redhat.com>2012-08-22 15:08:49 +0300
commit8e3d9d061b5d132217629e7b5635ff0c02488e65 (patch)
tree5af8ab12b3a61d46157d665ad0898b1ad0fc135e /virt
parent8fbe6a541f50eeec5e3e49bd92db23ade9496673 (diff)
downloadvexpress-lsk-8e3d9d061b5d132217629e7b5635ff0c02488e65.tar.gz
KVM: x86: fix possible infinite loop caused by reexecute_instruction
Currently, we reexecute all unhandleable instructions if they do not access on the mmio, however, it can not work if host map the readonly memory to guest. If the instruction try to write this kind of memory, it will fault again when guest retry it, then we will goto a infinite loop: retry instruction -> write #PF -> emulation fail -> retry instruction -> ... Fix it by retrying the instruction only when it faults on the writable memory Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
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