Quick followup. I was able to access the PMU from the guest by modifying HDCR registers as expected. So far no other side effects observed. > -----Original Message----- > From: Sundaram, Senthilkumar > Sent: Thursday, January 17, 2013 12:56 PM > To: Christoffer Dall; kvmarm@xxxxxxxxxxxxxxxxxxxxx > Cc: Alexander Spyridakis (a.spyridakis@xxxxxxxxxxxxxxxxxxxxxx); Sundaram, > Senthilkumar > Subject: Accessing Performance monitors from guest > > Hi, > > I notice that guest access to performance monitors is trapped and emulated > to provide dummy values. > > We would like to enable performance monitors for guest to run some tests. > So I am planning to disable trapping of all performance monitor accesses > from guest. I intend to do this by modifying the bits [0:7] in the HDCR > register. > > Do you see any issues with this approach? Is there anything else that I need > to do other than modifying HDCR? > > Thanks > Senthil > PS: Any reason why the PMU access has to be trapped? _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
