linux-kernel - RE: [PATCH v11 2/8] x86/resctrl: Prepare for per-CTRL_MON group mba

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <SJ1PR11MB6083BA367F2CDFC92D87FDA1FC3C2@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Mon, 9 Dec 2024 22:05:43 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: Borislav Petkov <bp@...en8.de>
CC: "Yu, Fenghua" <fenghua.yu@...el.com>, "Chatre, Reinette"
	<reinette.chatre@...el.com>, Peter Newman <peternewman@...gle.com>, "Jonathan
 Corbet" <corbet@....net>, "x86@...nel.org" <x86@...nel.org>, James Morse
	<james.morse@....com>, Jamie Iles <quic_jiles@...cinc.com>, Babu Moger
	<babu.moger@....com>, Randy Dunlap <rdunlap@...radead.org>, "Shaopeng Tan
 (Fujitsu)" <tan.shaopeng@...itsu.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>, "patches@...ts.linux.dev"
	<patches@...ts.linux.dev>
Subject: RE: [PATCH v11 2/8] x86/resctrl: Prepare for per-CTRL_MON group
 mba_MBps control

> > diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
> > index d94abba1c716..fd05b937e2f4 100644
> > --- a/include/linux/resctrl.h
> > +++ b/include/linux/resctrl.h
> > @@ -49,6 +49,8 @@ enum resctrl_event_id {
> >     QOS_L3_MBM_LOCAL_EVENT_ID       = 0x03,
> >  };
> >
> > +extern enum resctrl_event_id mba_mbps_default_event;
>
> Any reason this extern isn't in
>
> arch/x86/kernel/cpu/resctrl/internal.h

Trying to avoid making more work for the ARM folks as they split resctrl
into "file system" and "architecture specific" bits.

mba_mbps_default_event isn't architecture specific. The mba_MBps
feedback code could be implemented on any architecture that supports
both measurement and control of memory bandwidth.

-Tony