Re: [PATCH 1/6] x86: add SGX definition to cpufeature

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From	Andi Kleen <andi@firstfloor.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/6] x86: add SGX definition to cpufeature
Date	Mon, 25 Apr 2016 21:50:02 +0200
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X-Original-Cc	Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>, Greg KH <gregkh@linuxfoundation.org>, Kai Huang <kai.huang@linux.intel.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, "maintainer\:X86 ARCHITECTURE \(32-BIT AND 64-BIT\)" <x86@kernel.org>, Borislav Petkov <bp@suse.de>, Andy Lutomirski <luto@kernel.org>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Huang Rui <ray.huang@amd.com>, Mathias Krause <minipli@googlemail.com>, Wan Zongshun <Vincent.Wan@amd.com>, "open list\:X86 ARCHITECTURE \(32-BIT AND 64-BIT\)" <linux-kernel@vger.kernel.org>
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Andy Lutomirski <luto@amacapital.net> writes:

> On Mon, Apr 25, 2016 at 10:34 AM, Jarkko Sakkinen
> <jarkko.sakkinen@linux.intel.com> wrote:
>> From: Kai Huang <kai.huang@linux.intel.com>
>
> Should this come with a nosgx boot option and an IA32_FEATURE_CONTROL
> check to disable the feature if BIOS doesn't support it?

You can already disable every CPUID feature at boot with clearcpuid=...
No point in adding redundant options for everything.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only

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[PATCH 1/6] x86: add SGX definition to cpufeature Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-25 19:40 +0200
  Re: [PATCH 1/6] x86: add SGX definition to cpufeature Andy Lutomirski <luto@amacapital.net> - 2016-04-25 21:40 +0200
    Re: [PATCH 1/6] x86: add SGX definition to cpufeature Andi Kleen <andi@firstfloor.org> - 2016-04-25 21:50 +0200

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