On 02/01/2018 02:05, Wanpeng Li wrote: > The issue is still there after applying this to both L0 and L1, > actually, I can observe a vmentry fail just before the splatting in L0 > w/ and w/o the above code. In addition, I comment out the other > testcases in unittests.cfg except vmx_controls, then run > ./run_tests.sh. Ok, I didn't understand that you're running vmx.flat inside L1 (thus creating an L3 guest). The patch I sent is wrong, because SECONDARY_EXEC_DESC should always be clear in vmx->secondary_exec_control. Note that even with "-cpu host,+vmx,-umip" I get a hang at PASS: Use TPR shadow enabled: TPR threshold 0x10: vmlaunch fails So that might not be entirely related. However, the failures with descriptor exiting are new. Paolo
