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Date:   Thu, 20 Oct 2022 17:05:09 +0800
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Borislav Petkov <bp@alien8.de>
Cc:     Maxim Levitsky <mlevitsk@redhat.com>, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org,
        Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
        Ingo Molnar <mingo@redhat.com>,
        Josh Poimboeuf <jpoimboe@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Tony Luck <tony.luck@intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        "David S. Miller" <davem@davemloft.net>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "Chang S. Bae" <chang.seok.bae@intel.com>,
        Jane Malalane <jane.malalane@citrix.com>,
        Kees Cook <keescook@chromium.org>,
        Kan Liang <kan.liang@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Jiri Olsa <jolsa@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        linux-perf-users@vger.kernel.org,
        "open list:CRYPTO API" <linux-crypto@vger.kernel.org>
Subject: Re: [PATCH v2 1/5] perf/x86/intel/lbr: use setup_clear_cpu_cap
 instead of clear_cpu_cap
Message-ID: <Y1EPRauBmAXMVrCa@loth.rohan.me.apana.org.au>
References: <20220718141123.136106-1-mlevitsk@redhat.com>
 <20220718141123.136106-2-mlevitsk@redhat.com>
 <Yyh9RDbaRqUR1XSW@zn.tnic>
 <c105971a72dfe6d46ad75fb7e71f79ba716e081c.camel@redhat.com>
 <YzGlQBkCSJxY+8Jf@zn.tnic>
 <c1168e8bd9077a2cc9ef61ee06db7a4e8c0f1600.camel@redhat.com>
 <Y1EOBAaLbv2CXBDL@zn.tnic>
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On Thu, Oct 20, 2022 at 10:59:48AM +0200, Borislav Petkov wrote:
>
> I really really don't like it when people are fixing the wrong thing.
> 
> Why does the kernel need to get fixed when something else can't get its
> CPUID dependencies straight? I don't even want to know why something
> would set AVX2 without AVX?!?!

That's exactly what I said when this was first reported to me as
a crypto bug :)

Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt