Paolo Bonzini writes:
> Right now, enter_svm_guest_mode is calling nested_prepare_vmcb_save and
> nested_prepare_vmcb_control. This results in is_guest_mode being false
> until the end of nested_prepare_vmcb_control.
>
> This is a problem because nested_prepare_vmcb_save can in turn cause
> chan
On 18/02/21 19:12, Sean Christopherson wrote:
Yeah, the problem is I don't understand why 06fc7772690d fixed things in 11
year old KVM instead of breaking them, because effectively this patch is
reverting it.
11 year old KVM didn't grab a different VMCB when updating the intercepts, it
had alre
On Thu, Feb 18, 2021, Paolo Bonzini wrote:
> On 18/02/21 18:42, Sean Christopherson wrote:
> > > The bug is present since commit 06fc7772690d ("KVM: SVM: Activate nested
> > > state only when guest state is complete", 2010-04-25). Unfortunately,
> > > it is not clear from the commit message what i
On 18/02/21 18:42, Sean Christopherson wrote:
The bug is present since commit 06fc7772690d ("KVM: SVM: Activate nested
state only when guest state is complete", 2010-04-25). Unfortunately,
it is not clear from the commit message what issue exactly led to the
change back then. It was probably re
On Thu, Feb 18, 2021, Paolo Bonzini wrote:
> Right now, enter_svm_guest_mode is calling nested_prepare_vmcb_save and
> nested_prepare_vmcb_control. This results in is_guest_mode being false
> until the end of nested_prepare_vmcb_control.
>
> This is a problem because nested_prepare_vmcb_save can
Right now, enter_svm_guest_mode is calling nested_prepare_vmcb_save and
nested_prepare_vmcb_control. This results in is_guest_mode being false
until the end of nested_prepare_vmcb_control.
This is a problem because nested_prepare_vmcb_save can in turn cause
changes to the intercepts and these hav
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