Description: KVM: VMX: Execute IBPB on emulated VM-exit when guest has IBRS
References:
Notes:
 carnil> Commit fixes 5c911beff20a ("KVM: nVMX: Skip IBPB when switching
 carnil> between vmcs01 and vmcs02") in 5.8-rc1 (which got backported as
 carnil> well to 5.7.3, 5.6.19 and 5.4.47).
Bugs:
upstream: released (6.2-rc1) [2e7eab81425ad6c875f2ed47c0ce01e78afc38a5]
6.1-upstream-stable: released (6.1.14) [63fada296062e91ad9f871970d4e7f19e21a6a15]
5.10-upstream-stable: released (5.10.170) [1b0cafaae8884726c597caded50af185ffc13349]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.1.15-1)
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: N/A "Vulnerable code not present"