On 07/30/2011 12:03 PM, Takuya Yoshikawa wrote:
From: Takuya Yoshikawa<yoshikawa.takuya@xxxxxxxxxxxxx> Return EMULATION_OK/FAILED consistently. Also treat instruction fetch errors, not restricted to X86EMUL_UNHANDLEABLE, as EMULATION_FAILED; although this cannot happen in practice, the current logic will continue the emulation even if the decoder fails to fetch the instruction.
In fact it can happen in practice, but not through normal usage. For example, one vcpu can execute an instruction which traps into the emulator, while another vcpu changes the page tables to make the instruction unfetchable.
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