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Subject: Re: [PATCH RFC 0/5] cpu/speculation: Add 'cpu_spec_mitigations='
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To:     Josh Poimboeuf <jpoimboe@redhat.com>, linux-kernel@vger.kernel.org
Cc:     x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
        "H . Peter Anvin" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Jiri Kosina <jikos@kernel.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Jon Masters <jcm@redhat.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        linuxppc-dev@lists.ozlabs.org,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        linux-s390@vger.kernel.org,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Tyler Hicks <tyhicks@canonical.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
References: <cover.1554396090.git.jpoimboe@redhat.com>
From:   Waiman Long <longman@redhat.com>
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Organization: Red Hat
Message-ID: <ee83d3b8-d74a-dbeb-c838-0297b3c342c0@redhat.com>
Date:   Thu, 4 Apr 2019 12:50:54 -0400
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On 04/04/2019 12:44 PM, Josh Poimboeuf wrote:
> Keeping track of the number of mitigations for all the CPU speculation
> bugs has become overwhelming for many users.  It's getting more and more
> complicated to decide which mitigations are needed for a given
> architecture.  Complicating matters is the fact that each arch tends to
> it own custom way to mitigate the same vulnerability.

... tends to "have its" own ... ?

-Longman