Buslock trap patches for openAnolis 6.6 kernel: KVM: SVM: Treat DEBUGCTL[5:2] as reserved KVM: x86: Snapshot the host's DEBUGCTL after disabling IRQs KVM: SVM: Manually context switch DEBUGCTL if LBR virtualization is disabled KVM: x86: Snapshot the host's DEBUGCTL in common x86 x86/bus_lock: Add support for AMD x86/split_lock: Move Split and Bus lock code to a dedicated file Unit test Results: [amd@anolis ~]$ cpuid -1 -l 0x7 -s 0x0 -r CPU: 0x00000007 0x00: eax=0x00000001 ebx=0xf1bf97ab ecx=0x19415fde edx=0x10000110 [amd@anolis ~]$ sudo rdmsr 0x01d9 4 [amd@anolis ~]$ ./buslocktrap 10 [amd@anolis ~]$ dmesg | grep -i buslock [ 1206.227299] x86/split lock detection: #DB: buslocktrap/1413540 took a bus_lock trap at address: 0x55a207cd2166 [ 1254.699805] x86/split lock detection: #DB: buslocktrap/1413843 took a bus_lock trap at address: 0x55e823240166 [amd@anolis ~]$
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/5851