Re: [PATCH 1/8] KVM: SVM: Fix nested nmi handling

Joerg Roedel
2010-04-23T14:32:50Z

On Fri, Apr 23, 2010 at 04:24:54PM +0200, Alexander Graf wrote:
>
> On 23.04.2010, at 16:22, Joerg Roedel wrote:

> > No, nested_svm_nmi runs in atomic context where we can't emulate a
> > vmexit. We set exit_required and emulate the vmexit later.
>
> So we modify the L2 rflags and then trigger a #vmexit, leaving the l2
> state broken?

No, the rflags are changed in enable_nmi_window which isn't called when
we run nested and the nested hypervisor intercepts nmi. So it only runs
in the !nested case where it can't corrupt L2 state.

Joerg