linux-kernel - Re: [Patch v3 1/2] cgroup: sev: Add misc cgroup controller

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Date:   Fri, 12 Mar 2021 11:48:37 -0800
From:   Vipin Sharma <vipinsh@...gle.com>
To:     Michal Koutný <mkoutny@...e.com>,
        thomas.lendacky@....com, brijesh.singh@....com
Cc:     tj@...nel.org, rdunlap@...radead.org, jon.grimm@....com,
        eric.vantassell@....com, pbonzini@...hat.com, hannes@...xchg.org,
        frankja@...ux.ibm.com, borntraeger@...ibm.com, corbet@....net,
        seanjc@...gle.com, vkuznets@...hat.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, gingell@...gle.com,
        rientjes@...gle.com, dionnaglaze@...gle.com, kvm@...r.kernel.org,
        x86@...nel.org, cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Patch v3 1/2] cgroup: sev: Add misc cgroup controller

On Thu, Mar 11, 2021 at 07:59:03PM +0100, Michal Koutný wrote:
> > +#ifndef CONFIG_KVM_AMD_SEV
> > +/*
> > + * When this config is not defined, SEV feature is not supported and APIs in
> > + * this file are not used but this file still gets compiled into the KVM AMD
> > + * module.
> > + *
> > + * We will not have MISC_CG_RES_SEV and MISC_CG_RES_SEV_ES entries in the enum
> > + * misc_res_type {} defined in linux/misc_cgroup.h.
> BTW, was there any progress on conditioning sev.c build on
> CONFIG_KVM_AMD_SEV? (So that the defines workaround isn't needeed.)

Tom, Brijesh,
Is this something you guys thought about or have some plans to do in the
future? Basically to not include sev.c in compilation if
CONFIG_KVM_AMD_SEV is disabled.

Michal,
This should not be a blocker for misc controller. This thing can change
independent of misc cgroup.

Thanks
Vipin