https://bugzilla.kernel.org/show_bug.cgi?id=219787 Ravi Bangoria (ravi.bangoria@xxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ravi.bangoria@xxxxxxx --- Comment #12 from Ravi Bangoria (ravi.bangoria@xxxxxxx) --- Thanks for the bug report. This is what is probably happening: BusLockTrap is controlled through DEBUGCTL MSR and currently DEBUGCTL MSR is saved/restored on guest entry/exit only if LBRV is enabled. So, if BusLockTrap is enabled on the host, it will remain enabled even after guest entry and thus, if some process inside the guest causes a BusLock, KVM will inject #DB from host to the guest. I had a KVM patch[1] but couldn't get back to work on it. Let me try to spend some time and respin it. [1] https://lore.kernel.org/all/20240808062937.1149-5-ravi.bangoria@xxxxxxx -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
