Re: [PATCH] x86/perf: Fix guest_get_msrs static call if there is no PMU

[Dmitry Vyukov]

On Tue, Mar 9, 2021 at 6:05 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
>
> On Tue, Mar 09, 2021, Peter Zijlstra wrote:
> > On Tue, Mar 09, 2021 at 08:46:49AM +0100, Peter Zijlstra wrote:
> > > On Mon, Mar 08, 2021 at 12:40:44PM -0800, Sean Christopherson wrote:
> > > > On Mon, Mar 08, 2021, Peter Zijlstra wrote:
> > >
> > > > > Given the one user in atomic_switch_perf_msrs() that should work because
> > > > > it doesn't seem to care about nr_msrs when !msrs.
> > > >
> > > > Uh, that commit quite cleary says:
> > >
> > > D0h! I got static_call_cond() and __static_call_return0 mixed up.
> > > Anyway, let me see if I can make something work here.
> >
> > Does this work? I can never seem to start a VM, and if I do accidentally
> > manage, then it never contains the things I need :/
>
> Yep, once I found the dependencies in tip/sched/core (thank tip-bot!).  I'll
> send v2 your way.

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