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Date:   Mon, 22 Jun 2020 19:37:11 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     x86@kernel.org, linux-sgx@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Jethro Beekman <jethro@fortanix.com>,
        akpm@linux-foundation.org, andriy.shevchenko@linux.intel.com,
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        dave.hansen@intel.com, haitao.huang@intel.com,
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Subject: Re: [PATCH v33 01/21] x86/cpufeatures: x86/msr: Add Intel SGX
 hardware bits
Message-ID: <20200622173711.GJ32200@zn.tnic>
References: <20200617220844.57423-1-jarkko.sakkinen@linux.intel.com>
 <20200617220844.57423-2-jarkko.sakkinen@linux.intel.com>
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On Thu, Jun 18, 2020 at 01:08:23AM +0300, Jarkko Sakkinen wrote:
> From: Sean Christopherson <sean.j.christopherson@intel.com>
> 
> Add X86_FEATURE_SGX from CPUID.(EAX=7, ECX=1), which informs whether the
> CPU has SGX.
> 
> Add X86_FEATURE_SGX1 and X86_FEATURE_SGX2 from CPUID.(EAX=12H, ECX=0),
> which describe the level of SGX support available [1].
> 
> Add IA32_FEATURE_CONTROL_SGX_ENABLE. BIOS can use this bit to opt-in SGX

I'm guessing that wants to be

IA32_FEATURE_CONTROL.SGX_ENABLE

judging by the diff and the SDM chapter.

> before locking the feature control MSR [2].
> 
> [1] Intel SDM: 36.7.2 Intel® SGX Resource Enumeration Leaves
> [2] Intel SDM: 36.7.1 Intel® SGX Opt-In Configuration
> 
> Cc: Borislav Petkov <bp@alien8.de>
> Acked-by: Jethro Beekman <jethro@fortanix.com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Co-developed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> ---
>  arch/x86/include/asm/cpufeature.h        |  5 +++--
>  arch/x86/include/asm/cpufeatures.h       |  7 ++++++-
>  arch/x86/include/asm/disabled-features.h | 18 +++++++++++++++---
>  arch/x86/include/asm/msr-index.h         |  1 +
>  arch/x86/include/asm/required-features.h |  2 +-
>  arch/x86/kernel/cpu/common.c             |  4 ++++
>  tools/arch/x86/include/asm/cpufeatures.h |  7 ++++++-

Also, please drop this change to tools/, see

https://lkml.kernel.org/r/20200622141737.GA30611@kernel.org

from today.

With those addressed:

Reviewed-by: Borislav Petkov <bp@suse.de>

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette