Follow up question, if a frequency driver is employed for PM does arch timer tick at same rate for the clock source and timer? Thanks, Mario Mario Smarduch Virtualization Architect HUAWEI TECHNOLOGIES DUESSELDORF GmbH Munich Office, European Research Center Riesstraße 25 80992 München Mobile: +49 (0) 173463-5271 Fax: +49 (0)89-158834-4455 E-mail: mario.smarduch@xxxxxxxxxx www.huawei.com HUAWEI TECHNOLOGIES Duesseldorf GmbH Am Seestern 24, 40547 Düsseldorf, Germany, www.huawei.com Registered Office: Düsseldorf, Register Court Düsseldorf, HRB 56063, Managing Director: Jingwen TAO, Wanzhou MENG, Lifang CHEN Sitz der Gesellschaft: Düsseldorf, Amtsgericht Düsseldorf, HRB 56063, Geschäftsführer: Jingwen TAO, Wanzhou MENG, Lifang CHEN -----Original Message----- From: Marc Zyngier [mailto:marc.zyngier@xxxxxxx] Sent: Wednesday, January 09, 2013 11:24 AM To: Mario Smarduch Cc: kvmarm@xxxxxxxxxxxxxxxxxxxxx Subject: Re: ARM ARCH TImers and High Res Timers On 09/01/13 10:05, Mario Smarduch wrote: > Hello, I have a rather basic question, but a important one for us. > We're looking at implementing RT features in the Guest, one of them is > High Res, timers. Working with VE I noticed that that Virtual timer > interrupts are taken in the Guest without exits, is that a Architecture > Timer standard regardless the hardware or just something special > on the VE FM platform. This is a feature of the architecture. The virtual timer and counter are directly accessible from a guest, and thus can be used without trapping. Of course, being a shared resource, they are switched in and out on a world switch. M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
