On 27.09.2011, at 18:01, Bhushan Bharat-R65777 wrote: > > >> -----Original Message----- >> From: kvm-ppc-ow...@vger.kernel.org [mailto:kvm-ppc- >> ow...@vger.kernel.org] On Behalf Of Alexander Graf >> Sent: Tuesday, September 27, 2011 1:45 PM >> To: Wood Scott-B07421 >> Cc: Liu Yu-B13201; Wood Scott-B07421; kvm-ppc@vger.kernel.org >> Subject: Re: [PATCH 5/5] KVM: PPC: booke: Improve timer register >> emulation >> >> >> On 27.09.2011, at 02:44, Scott Wood wrote: >> >>> On 09/24/2011 02:27 AM, Alexander Graf wrote: >>>> I think I'm getting your point. So what we want is: >>>> >>>> in timer handler: >>>> >>>> set_bit(TSR_DIS, vcpu->arch.tsr); >>>> kvm_make_request(KVM_REQ_PPC_TSR_UPDATE, vcpu); >>>> kvm_vcpu_kick(vcpu); > > Still there can be a case where first request not handled and another event > happens? Or we would like to pause till first request is handled by vcpu?
If the first DIS request is not handled and another event happens, the interrupts get coalesced (like on real hardware). If there is another TSR bit set still, int_pending should still be active and the guest exits the next time it sets MSR_EE, making us inject the next interrupt. Alex -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
