linux-kernel - Re: [RFC Patch 1/2] KVM: SVM: Create SEV cgroup controller.

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Date:   Mon, 21 Sep 2020 18:04:04 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Vipin Sharma <vipinsh@...gle.com>, thomas.lendacky@....com,
        pbonzini@...hat.com, sean.j.christopherson@...el.com,
        tj@...nel.org, lizefan@...wei.com
Cc:     joro@...tes.org, corbet@....net, brijesh.singh@....com,
        jon.grimm@....com, eric.vantassell@....com, gingell@...gle.com,
        rientjes@...gle.com, kvm@...r.kernel.org, x86@...nel.org,
        cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Dionna Glaze <dionnaglaze@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>
Subject: Re: [RFC Patch 1/2] KVM: SVM: Create SEV cgroup controller.

Hi,

On 9/21/20 5:40 PM, Vipin Sharma wrote:
> diff --git a/init/Kconfig b/init/Kconfig
> index d6a0b31b13dc..1a57c362b803 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -1101,6 +1101,20 @@ config CGROUP_BPF
>  	  BPF_CGROUP_INET_INGRESS will be executed on the ingress path of
>  	  inet sockets.
>  
> +config CGROUP_SEV
> +	bool "SEV ASID controller"
> +	depends on KVM_AMD_SEV
> +	default n
> +	help
> +	  Provides a controller for AMD SEV ASIDs. This controller limits and
> +	  shows the total usage of SEV ASIDs used in encrypted VMs on AMD
> +	  processors. Whenever a new encrypted VM is created using SEV on an
> +	  AMD processor, this controller will check the current limit in the
> +	  cgroup to which the task belongs and will deny the SEV ASID if the
> +	  cgroup has already reached its limit.
> +
> +	  Say N if unsure.

Something here (either in the bool prompt string or the help text) should
let a reader know w.t.h. SEV means.

Without having to look in other places...

thanks.
-- 
~Randy