linux-kernel - Re: [PATCH v14 1/7] x86: lib: Separate instruction decoder MMIO type from MMIO trace

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Message-ID: <CAHmME9p6zwGU33hq1D1Zt9ek8T5ExBp7jLxgn1DVhO4bvOODog@mail.gmail.com>
Date:   Wed, 4 Jan 2023 21:29:52 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev, tglx@...utronix.de,
        linux-crypto@...r.kernel.org, linux-api@...r.kernel.org,
        x86@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Adhemerval Zanella Netto <adhemerval.zanella@...aro.org>,
        "Carlos O'Donell" <carlos@...hat.com>,
        Florian Weimer <fweimer@...hat.com>,
        Arnd Bergmann <arnd@...db.de>, Jann Horn <jannh@...gle.com>,
        Christian Brauner <brauner@...nel.org>
Subject: Re: [PATCH v14 1/7] x86: lib: Separate instruction decoder MMIO type
 from MMIO trace

On Wed, Jan 4, 2023 at 9:26 PM Ingo Molnar <mingo@...nel.org> wrote:
>
>
> * Ingo Molnar <mingo@...nel.org> wrote:
>
> >
> > * Jason A. Donenfeld <Jason@...c4.com> wrote:
> >
> > > On Tue, Jan 3, 2023 at 6:29 PM Borislav Petkov <bp@...en8.de> wrote:
> > > >
> > > > On Tue, Jan 03, 2023 at 06:00:46PM +0100, Ingo Molnar wrote:
> > > > > > I guess you missed the conversation with Borislav yesterday about that.
> > > > > > He mentioned that I'd just take it through random.git when this whole
> > > > > > series goes in.
> > > > >
> > > > > Please base your tree off on tip:x86/asm then (or pull it in) - it only
> > > >
> > > > My idea was a lot simpler: avoid the tree inter-dependency by us acking this
> > > > patch so that it can go through the random.git tree.
> > >
> > > Indeed I would prefer this.
> > >
> > > Or... just put this in 6.2 because it's trivial anyway? Heck, even mark
> > > it as stable@ so make future backporting easier. Then it'll meet tip's
> > > urgent criteria.
> >
> > Yeah - that's sensible too, it does fix a header namespace bug - I've put
> > it into tip:x86/urgent.
>
> This namespace clash fix is now upstream as of 512dee0c00ad & later kernels.

Thanks. I've rebased my vdso branch on that now. I guess at this point
it probably doesn't matter that much since everyone hates my use of
the instruction decoder anyway, so I'll see what else I can do for
v15, but still, it'll at least make it easier to experiment.

Jason