Changes between Initial Version and Version 1 of Ticket #19171, comment 15
- Timestamp:
- Feb 1, 2020 2:05:20 AM (5 years ago)
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Ticket #19171, comment 15
initial v1 3 3 It seems increasing the VCPU count really helps because it seems to drastically increase the chance of the VMM exiting to ring-3. And the bug (regression) is precisely *only* in the exit-to-ring 3 scenario when ICEBP #DB VM-exits occurs. 4 4 5 We incorrectly reset the instruction length of the faulting ICEBP instruction while exiting to ring-3 and while restoring it, it would berestored as 0xff. Hence VT-x rightly complained that the instruction length is incorrect (should be 0-15).5 The instruction length of the faulting ICEBP instruction while exiting to ring-3 was incorrectly being reset. Thus while restoring it on re-entry in ring-0, it gets restored as 0xff. Hence VT-x rightly complained that the instruction length is incorrect (should be 0-15). 6 6 7 7 The fix will be available in the next maintenance release of VirtualBox.

