On Thu, 2020-08-20 at 14:00 -0700, Jim Mattson wrote:
> On Thu, Aug 20, 2020 at 6:33 AM Maxim Levitsky <mlevitsk@xxxxxxxxxx> wrote:
> > No functional changes.
> >
> > Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
> > ---
> > arch/x86/kvm/svm/nested.c | 10 +++++-----
> > arch/x86/kvm/svm/svm.c | 13 +++++++------
> > arch/x86/kvm/svm/svm.h | 2 +-
> > 3 files changed, 13 insertions(+), 12 deletions(-)
> >
> > diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
> > index fb68467e6049..f5b17920a2ca 100644
> > --- a/arch/x86/kvm/svm/nested.c
> > +++ b/arch/x86/kvm/svm/nested.c
> > @@ -431,7 +431,7 @@ int enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
> For consistency, should the vmcb_gpa argument be renamed to vmcb12_gpa as well?
I went over all nested.c and renamed all mentions of vmcb which refer to guest's vmcb to vmcb12,
and mentions of nested_vmcb to vmcb12 as well. I hope I didn't made this patch too much larger.
I updated the patch subject too.
>
>
> > @@ -579,7 +579,7 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
> >
> > /* Exit Guest-Mode */
> > leave_guest_mode(&svm->vcpu);
> > - svm->nested.vmcb = 0;
> > + svm->nested.vmcb12_gpa = 0;
> Perhaps in a follow-up change, this could be set to an illegal value
> rather than 0?
Or rather not reset this address at all, as I did later in the
caching pathes which I dropped for now.
>
>
> > @@ -1018,7 +1018,7 @@ static int svm_get_nested_state(struct kvm_vcpu *vcpu,
> >
> > /* First fill in the header and copy it out. */
> > if (is_guest_mode(vcpu)) {
> > - kvm_state.hdr.svm.vmcb_pa = svm->nested.vmcb;
> > + kvm_state.hdr.svm.vmcb_pa = svm->nested.vmcb12_gpa;
> It's unfortunate that we have "_pa" on the LHS on "_gpa" on the RHS. Oh, well.
I was afraid to touch this struct since it is user visible. I noticed it.
>
>
> > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> > index 562a79e3e63a..d33013b9b4d7 100644
> > --- a/arch/x86/kvm/svm/svm.c
> > +++ b/arch/x86/kvm/svm/svm.c
> > @@ -1102,7 +1102,7 @@ static void init_vmcb(struct vcpu_svm *svm)
> > }
> > svm->asid_generation = 0;
> >
> > - svm->nested.vmcb = 0;
> > + svm->nested.vmcb12_gpa = 0;
> Here, too, perhaps this could be changed from 0 to an illegal value in
> a follow-up change.
>
> Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
>
Thanks for the review,
Best regards,
Maxim Levitsky
