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    SubjectRe: [PATCH 1/9] KVM: SVM: Notify nested hypervisor of lost event injections
    On 10/08/2009 06:22 PM, Joerg Roedel wrote:
    > On Thu, Oct 08, 2009 at 06:12:28PM +0200, Avi Kivity wrote:
    >
    >> On 10/08/2009 12:03 PM, Joerg Roedel wrote:
    >>
    >>> From: Alexander Graf<agraf@suse.de>
    >>>
    >>> If event_inj is valid on a #vmexit the host CPU would write
    >>> the contents to exit_int_info, so the hypervisor knows that
    >>> the event wasn't injected.
    >>>
    >>> We don't do this in nested SVM by now which is a bug and
    >>> fixed by this patch.
    >>>
    >> We need to start thinking about regression tests for these bugs. It
    >> would be relatively easy to set up something with save->cr3 == cr3
    >> (i.e. no isolation, mmu virtualization, etc.).
    >>
    > Should be doable with a in-kernel regression test-suite module, I think.
    > Triggering such (race-condition like) test cases from userspace is
    > somewhat hard.
    >
    >

    Isn't it sufficient, for this case, to inject a nested interrupt when
    the nested idt is not mapped?

    --
    error compiling committee.c: too many arguments to function



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