On Fri, Aug 04, 2023 at 06:10:19PM +0530, Nikunj A. Dadhania wrote:
> On 8/4/2023 4:44 PM, Peter Zijlstra wrote:
> > On Wed, Aug 02, 2023 at 02:41:07PM +0530, Nikunj A Dadhania wrote:
> >> commit 7f4b5cde2409 ("kvm: Disable objtool frame pointer checking for
> >> vmenter.S") had added the vmenter.o file to the exception list.
> >>
> >> objtool gives the following warnings in the newer kernel builds:
> >>
> >> arch/x86/kvm/kvm-amd.o: warning: objtool: __svm_vcpu_run+0x17d: BP used as a scratch register
> >> arch/x86/kvm/kvm-amd.o: warning: objtool: __svm_sev_es_vcpu_run+0x72: BP used as a scratch register
> >>
> >
> > I wanted to poke around a little, but can't reproduce this.
> >
> > I took x86_64-defconfig + KVM=m + KVM_AMD=m + UNWIND_FRAME_POINTER=y but
> > objtool won't complain :/ What actual .config trips this?
>
> I have attached the config.
Thanks, that does reproduce, although now I'm left wondering what
exactly makes it go beep. Also, URGH, I thought the build was broken
until I noticed it had BTF on :/
