linux-kernel - [tip: x86/cache] x86/resctrl: Move mba_mbps_default

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Message-ID: <174180002422.14745.4469088229520775387.tip-bot2@tip-bot2>
Date: Wed, 12 Mar 2025 17:20:24 -0000
From: "tip-bot2 for James Morse" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: James Morse <james.morse@....com>, "Borislav Petkov (AMD)" <bp@...en8.de>,
 Reinette Chatre <reinette.chatre@...el.com>, Fenghua Yu <fenghuay@...dia.com>,
 Babu Moger <babu.moger@....com>, Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
 Peter Newman <peternewman@...gle.com>,
 Amit Singh Tomar <amitsinght@...vell.com>,
 Shanker Donthineni <sdonthineni@...dia.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/cache] x86/resctrl: Move mba_mbps_default_event init to
 filesystem code

The following commit has been merged into the x86/cache branch of tip:

Commit-ID:     37bae1756734b065f5e5cddc54ad121ff0c8db51
Gitweb:        https://git.kernel.org/tip/37bae1756734b065f5e5cddc54ad121ff0c8db51
Author:        James Morse <james.morse@....com>
AuthorDate:    Tue, 11 Mar 2025 18:37:06 
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Wed, 12 Mar 2025 12:23:52 +01:00

x86/resctrl: Move mba_mbps_default_event init to filesystem code

mba_mbps_default_event is initialised based on whether mbm_local or mbm_total
is supported. In the case of both, it is initialised to mbm_local.
mba_mbps_default_event is initialised in core.c's get_rdt_mon_resources(),
while all the readers are in rdtgroup.c.

After this code is split into architecture-specific and filesystem code,
get_rdt_mon_resources() remains part of the architecture code, which would
mean mba_mbps_default_event has to be exposed by the filesystem code.

Move the initialisation to the filesystem's resctrl_mon_resource_init().

Signed-off-by: James Morse <james.morse@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
Reviewed-by: Fenghua Yu <fenghuay@...dia.com>
Reviewed-by: Babu Moger <babu.moger@....com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Tested-by: Peter Newman <peternewman@...gle.com>
Tested-by: Shaopeng Tan <tan.shaopeng@...fujitsu.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>
Link: https://lore.kernel.org/r/20250311183715.16445-22-james.morse@arm.com
---
 arch/x86/kernel/cpu/resctrl/core.c    | 5 -----
 arch/x86/kernel/cpu/resctrl/monitor.c | 5 +++++
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 6f0d1bb..b9b74f5 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -923,11 +923,6 @@ static __init bool get_rdt_mon_resources(void)
 	if (!rdt_mon_features)
 		return false;
 
-	if (resctrl_arch_is_mbm_local_enabled())
-		mba_mbps_default_event = QOS_L3_MBM_LOCAL_EVENT_ID;
-	else if (resctrl_arch_is_mbm_total_enabled())
-		mba_mbps_default_event = QOS_L3_MBM_TOTAL_EVENT_ID;
-
 	return !rdt_get_mon_l3_config(r);
 }
 
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 27d9831..306b06b 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -1213,6 +1213,11 @@ int __init resctrl_mon_resource_init(void)
 					 RFTYPE_MON_INFO | RFTYPE_RES_CACHE);
 	}
 
+	if (resctrl_arch_is_mbm_local_enabled())
+		mba_mbps_default_event = QOS_L3_MBM_LOCAL_EVENT_ID;
+	else if (resctrl_arch_is_mbm_total_enabled())
+		mba_mbps_default_event = QOS_L3_MBM_TOTAL_EVENT_ID;
+
 	return 0;
 }