Re: [Xen-devel] Is there something in Xen to clear IA32_DEBUGCTL MSR during hvm execution

2017-10-28 Thread Andrew Cooper
On 28/10/2017 13:40, 刘维杰 wrote: > Dear list, > > We are some researchers who are interested in Xen so much. And > recently we meet a problem when we want to fetch some Intel Last > Branch Record information of guest HVMs. > > When we are trying to debug the Intel IA32_DEBUGCTL MSR on Xen 4.6.0 Unr

[Xen-devel] Is there something in Xen to clear IA32_DEBUGCTL MSR during hvm execution

2017-10-28 Thread 刘维杰
Dear list, We are some researchers who are interested in Xen so much. And recently we meet a problem when we want to fetch some Intel Last Branch Record information of guest HVMs. When we are trying to debug the Intel IA32_DEBUGCTL MSR on Xen 4.6.0 (specifically we set the value as 1 when ever