search for: ia32_debugctl

Hi I am working on a project using WINDOWS guest on XEN archticture. I have a couple of questions. As I understand when a VM exit occurs due to I/O like say a mouse interrupt -- the XEN hypervisor gets a notification and it forwards the I/O request to the qemu-dm in Domain-0 via an event channel. Now during this VM exit , is the guest OS blocked ? Specifically, what about VGA writes are they

Hi, I''m a student working on a research project using xen, and part of what we are doing requires the ability to use the branch tracing facilities of the processor. I.e. we need to be able to write to the IA32_DEBUGCTL MSR and read from the Last Branch Record (LBR) stack (the second of which it appears we can do). We saw a thread discussing this: http://lists.xensource.com/archives/html/xen-devel/2007-08/msg00198.html . However, it doesn''t appear that the method was ever finalized, and we were unable t...

Oops forgot to change the subject! Please find my email below Sujata Hi, I''m a student working on a research project using xen, and part of what we are doing requires the ability to use the branch tracing facilities of the processor. I.e. we need to be able to write to the IA32_DEBUGCTL MSR and read from the Last Branch Record (LBR) stack (the second of which it appears we can do). We saw a thread discussing this: http://lists.xensource.com/archives/html/xen-devel/2007-08/msg00198.html . However, it doesn''t appear that the method was ever finalized, and we were unable t...