linux-kernel - [PATCH v8 07/21] x86/resctrl: Add end-marker to the resctrl_event

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: <20250411164229.23413-8-james.morse@arm.com>
Date: Fri, 11 Apr 2025 16:42:15 +0000
From: James Morse <james.morse@....com>
To: x86@...nel.org,
	linux-kernel@...r.kernel.org
Cc: Reinette Chatre <reinette.chatre@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	H Peter Anvin <hpa@...or.com>,
	Babu Moger <Babu.Moger@....com>,
	James Morse <james.morse@....com>,
	shameerali.kolothum.thodi@...wei.com,
	D Scott Phillips OS <scott@...amperecomputing.com>,
	carl@...amperecomputing.com,
	lcherian@...vell.com,
	bobo.shaobowang@...wei.com,
	tan.shaopeng@...itsu.com,
	baolin.wang@...ux.alibaba.com,
	Jamie Iles <quic_jiles@...cinc.com>,
	Xin Hao <xhao@...ux.alibaba.com>,
	peternewman@...gle.com,
	dfustini@...libre.com,
	amitsinght@...vell.com,
	David Hildenbrand <david@...hat.com>,
	Rex Nie <rex.nie@...uarmicro.com>,
	Dave Martin <dave.martin@....com>,
	Koba Ko <kobak@...dia.com>,
	Shanker Donthineni <sdonthineni@...dia.com>,
	fenghuay@...dia.com,
	Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
	Babu Moger <babu.moger@....com>,
	Tony Luck <tony.luck@...el.com>
Subject: [PATCH v8 07/21] x86/resctrl: Add end-marker to the resctrl_event_id enum

The resctrl_event_id enum gives names to the counter event numbers on x86.
These are used directly by resctrl.

To allow the MPAM driver to keep an array of these the size of the enum
needs to be known.

Add a 'num_events' define which can be used to size an array. This isn't
a member of the enum to avoid updating switch statements that would
otherwise be missing a case.

Signed-off-by: James Morse <james.morse@....com>
Tested-by: Carl Worth <carl@...amperecomputing.com> # arm64
Tested-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Tested-by: Peter Newman <peternewman@...gle.com>
Tested-by: Amit Singh Tomar <amitsinght@...vell.com> # arm64
Tested-by: Shanker Donthineni <sdonthineni@...dia.com> # arm64
Tested-by: Babu Moger <babu.moger@....com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
Reviewed-by: Fenghua Yu <fenghuay@...dia.com>
---
 include/linux/resctrl_types.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index f26450b3326b..654323066174 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -51,4 +51,6 @@ enum resctrl_event_id {
 	QOS_L3_MBM_LOCAL_EVENT_ID	= 0x03,
 };
 
+#define QOS_NUM_EVENTS		(QOS_L3_MBM_LOCAL_EVENT_ID + 1)
+
 #endif /* __LINUX_RESCTRL_TYPES_H */
-- 
2.20.1