On Fri, Apr 23, 2010 at 03:57:32PM +0200, Alexander Graf wrote: > > On 22.04.2010, at 12:33, Joerg Roedel wrote: > > > This patch adds logic to kvm/x86 which allows to mark an > > injected exception as reinjected. This allows to remove an > > ugly hack from svm_complete_interrupts that prevented > > exceptions from being reinjected at all in the nested case. > > The hack was necessary because an reinjected exception into > > the nested guest could cause a nested vmexit emulation. But > > reinjected exceptions must not intercept. The downside of > > the hack is that a exception that in injected could get > > lost. > > This patch fixes the problem and puts the code for it into > > generic x86 files because. Nested-VMX will likely have the > > same problem and could reuse the code. > > So we always handle the reinjection from KVM code? Shouldn't the l1 > hypervisor do this? No. We only have the problem if we need to handle a nested intercept on the host level instead of reinjecting it. So the nested hypervisor couldn't be involved in the reinjection. Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
