[lkml]   [2010]   [Apr]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 7/8] KVM: x86: Allow marking an exception as reinjected
    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.


     \ /
      Last update: 2010-04-23 16:29    [W:0.023 / U:11.996 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site