linux-kernel - Re: [PATCH 2/3] powerpc/sysfs: Show idle_purr and idle

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Message-ID: <87pnh3u3ts.fsf@linux.ibm.com>
Date:   Wed, 04 Dec 2019 16:24:31 -0600
From:   Nathan Lynch <nathanl@...ux.ibm.com>
To:     "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
        Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Tyrel Datwyler <tyreld@...ux.ibm.com>
Subject: Re: [PATCH 2/3] powerpc/sysfs: Show idle_purr and idle_spurr for every CPU

"Gautham R. Shenoy" <ego@...ux.vnet.ibm.com> writes:
> @@ -1067,6 +1097,8 @@ static int __init topology_init(void)
>  			register_cpu(c, cpu);
>  
>  			device_create_file(&c->dev, &dev_attr_physical_id);
> +			if (firmware_has_feature(FW_FEATURE_SPLPAR))
> +				create_idle_purr_spurr_sysfs_entry(&c->dev);

Architecturally speaking PURR/SPURR aren't strongly linked to the PAPR
SPLPAR option, are they? I'm not sure it's right for these attributes to
be absent if the platform does not support shared processor mode.