linux-kernel - Re: [tip:x86/alternatives 14/14] arch/x86/kvm/kvm.o: warning: objtool: .altinstr_replacement+0xc5: call without frame pointer save/setup

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Date: Mon, 17 Jun 2024 07:39:51 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Borislav Petkov <bp@...en8.de>
Cc: kernel test robot <lkp@...el.com>, Peter Zijlstra <peterz@...radead.org>, 
	Josh Poimboeuf <jpoimboe@...nel.org>, oe-kbuild-all@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [tip:x86/alternatives 14/14] arch/x86/kvm/kvm.o: warning:
 objtool: .altinstr_replacement+0xc5: call without frame pointer save/setup

On Sat, Jun 15, 2024, Borislav Petkov wrote:
> On Fri, Jun 14, 2024 at 08:35:23AM -0700, Sean Christopherson wrote:
> > > I know Sean had a patchset to cleanup that gunk. Sean?
> > 
> > That series was just for the actual VM-Enter/VM-Exit path. 
> 
> Right, about that. I still see:
> 
> vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xb0: call to sev_es_host_save_area() leaves .noinstr.text section
> vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xbf: call to sev_es_host_save_area.isra.0() leaves .noinstr.text section
> 
> in allyesconfig builds....

Gah, sev_es_host_save_area() needs to be tagged __always_inline.