On 2012-02-16 16:21, Avi Kivity wrote: > On 02/14/2012 05:13 PM, Jan Kiszka wrote: >> Note that KVM without in-kernel irqchip will report the address after >> the instruction that triggered a write access. In contrast, read >> accesses will return the precise information. >> > > Well this is wierd. We could retro-doc one or the other behaviour, but > this-on-read-but-that-on-write is just too strange. > > The documented way of dealing with this is to queue a signal and reenter > the guest. kvm will perform anything it needs to complete the > instruction (perhaps issuing more mmio, say if someone used movsd to > read the APIC) and then exit on the signal. By then rip will point > exactly after the instruction.
Hmm, true. And can trivially be changed (I'm injecting the event after instruction completion). Will role out a new version. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
