linux-kernel - Re: [RFC PATCH v1 02/18] x86: Secure Memory Encryption (SME) build enablement

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Message-ID: <20160322130150.GB16528@xo-6d-61-c0.localdomain>
Date:	Tue, 22 Mar 2016 14:01:50 +0100
From:	Pavel Machek <pavel@....cz>
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>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrey Ryabinin <aryabinin@...tuozzo.com>,
	Alexander Potapenko <glider@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [RFC PATCH v1 02/18] x86: Secure Memory Encryption (SME) build
 enablement

On Tue 2016-04-26 17:56:14, Tom Lendacky wrote:
> Provide the Kconfig support to build the SME support in the kernel.


Probably should go last in the series?

> 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 7bb1574..13249b5 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1356,6 +1356,15 @@ 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"
> +	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"

-- 
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