linux-kernel - Re: [RFC PATCH v2 03/20] x86: Secure Memory Encryption (SME) build enablement

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Date:   Fri, 2 Sep 2016 13:03:51 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Tom Lendacky <thomas.lendacky@....com>
Cc:     linux-arch@...r.kernel.org, linux-efi@...r.kernel.org,
        kvm@...r.kernel.org, linux-doc@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Radim Krčmář <rkrcmar@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Joerg Roedel <joro@...tes.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Ingo Molnar <mingo@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Alexander Potapenko <glider@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [RFC PATCH v2 03/20] x86: Secure Memory Encryption (SME) build
 enablement

On Mon, Aug 22, 2016 at 05:35:59PM -0500, Tom Lendacky wrote:
> Provide the Kconfig support to build the SME support in the kernel.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
> ---
>  arch/x86/Kconfig |    9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index c580d8c..131f329 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1357,6 +1357,15 @@ config X86_DIRECT_GBPAGES
>  	  supports them), so don't confuse the user by printing
>  	  that we have them enabled.
>  
> +config AMD_MEM_ENCRYPT
> +	bool "Secure Memory Encryption support for AMD"

	     "AMD Secure Memory Encryption support"

> +	depends on X86_64 && CPU_SUP_AMD
> +	---help---
> +	  Say yes to enable the encryption of system memory. This requires
> +	  an AMD processor that supports Secure Memory Encryption (SME).
> +	  The encryption of system memory is disabled by default but can be
> +	  enabled with the mem_encrypt=on command line option.
> +
>  # Common NUMA Features
>  config NUMA
>  	bool "Numa Memory Allocation and Scheduler Support"

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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