linux-kernel - Re: [PATCH v3 21/28] x86/sgx: Limit process EPC usage with misc cgroup controller

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Message-ID: <70cd3d3d-48b0-7570-850a-906a1d960bbd@infradead.org>
Date:   Wed, 12 Jul 2023 17:03:25 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Haitao Huang <haitao.huang@...ux.intel.com>, jarkko@...nel.org,
        dave.hansen@...ux.intel.com, tj@...nel.org,
        linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
        cgroups@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Cc:     kai.huang@...el.com, reinette.chatre@...el.com,
        Kristen Carlson Accardi <kristen@...ux.intel.com>,
        zhiquan1.li@...el.com, seanjc@...gle.com
Subject: Re: [PATCH v3 21/28] x86/sgx: Limit process EPC usage with misc
 cgroup controller



On 7/12/23 16:01, Haitao Huang wrote:
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 53bab123a8ee..8a7378159e9e 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1952,6 +1952,19 @@ config X86_SGX
>  
>  	  If unsure, say N.
>  
> +config CGROUP_SGX_EPC
> +	bool "Miscellaneous Cgroup Controller for Enclave Page Cache (EPC) for Intel SGX"
> +	depends on X86_SGX && CGROUP_MISC
> +	help
> +	  Provides control over the EPC footprint of tasks in a cgroup via
> +	  the Miscellaneous cgroup controller.
> +
> +	  EPC is a subset of regular memory that is usable only by SGX
> +	  enclaves and is very limited in quantity, e.g. less than 1%
> +	  of total DRAM.
> +
> +          Say N if unsure.

Use tab + 2 spaces above for indentation, please.

-- 
~Randy