linux-kernel - Re: [PATCH v12 03/13] x86/sgx: add SGX definitions to msr-index.h

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Date:   Tue, 3 Jul 2018 20:51:23 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        dave.hansen@...el.com, sean.j.christopherson@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com,
        linux-sgx@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Borislav Petkov <bp@...e.de>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Janakarajan Natarajan <Janakarajan.Natarajan@....com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 03/13] x86/sgx: add SGX definitions to msr-index.h

On Tue, 3 Jul 2018, Jarkko Sakkinen wrote:

x86/msr: Add ....

> From: Sean Christopherson <sean.j.christopherson@...el.com>
> 
> ENCLS and ENCLU are usable if and only if SGX_ENABLE is set and After
> SGX is activated the IA32_SGXLEPUBKEYHASHn MSRs are writable if
> SGX_LC_WR is set and the feature control is locked.
> 
> SGX related bits in IA32_FEATURE_CONTROL cannot be set before SGX is
> activated by the pre-boot firmware. SGX activation is triggered by
> setting bit 0 in the MSR 0x7a. Until SGX is activated, the LE hash MSRs
> are writable to allow pre-boot firmware to lock down the LE root key
> with a non-Intel value.
> 
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Co-developed-by: Haim Cohen <haim.cohen@...el.com>

Lacks SOB

> ---
>  arch/x86/include/asm/msr-index.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
> index fda2114197b3..a7355fb7344f 100644
> --- a/arch/x86/include/asm/msr-index.h
> +++ b/arch/x86/include/asm/msr-index.h
> @@ -479,6 +479,8 @@
>  #define FEATURE_CONTROL_LOCKED				(1<<0)
>  #define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX	(1<<1)
>  #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX	(1<<2)
> +#define FEATURE_CONTROL_SGX_ENABLE                      (1<<18)

Tabs not spaces please. checkpatch.pl would have told you

> +#define FEATURE_CONTROL_SGX_LE_WR			(1<<17)

Thanks,

	tglx