linux-kernel - [RFC PATCH 07/20] x86/intel_rdt: Expose update

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Message-Id: <20180824104519.11203-8-james.morse@arm.com>
Date:   Fri, 24 Aug 2018 11:45:06 +0100
From:   James Morse <james.morse@....com>
To:     linux-kernel@...r.kernel.org
Cc:     x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Ingo Molnar <mingo@...hat.com>, H Peter Anvin <hpa@...or.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>
Subject: [RFC PATCH 07/20] x86/intel_rdt: Expose update_domains() as an arch helper

update_domains() applies the staged configuration to the hw_dom's
configuration array and updates the hardware. Make it part of the
interface between resctrl and the arch code.

Signed-off-by: James Morse <james.morse@....com>
---
 arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 4 ++--
 include/linux/resctrl.h                     | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
index ec3c15ee3473..766c3e62ad91 100644
--- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
@@ -193,7 +193,7 @@ static void apply_config(struct rdt_hw_domain *hw_dom,
 	}
 }
 
-static int update_domains(struct rdt_resource *r)
+int resctrl_arch_update_domains(struct rdt_resource *r)
 {
 	struct resctrl_staged_config *cfg;
 	struct rdt_hw_domain *hw_dom;
@@ -312,7 +312,7 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
 	}
 
 	for_each_alloc_enabled_rdt_resource(r) {
-		ret = update_domains(r);
+		ret = resctrl_arch_update_domains(r);
 		if (ret)
 			goto out;
 	}
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 03d9fbc230af..9fe7d7de53d7 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -125,6 +125,7 @@ struct rdt_resource {
 
 };
 
+int resctrl_arch_update_domains(struct rdt_resource *r);
 void resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d,
 			     u32 closid, u32 *value);
 
-- 
2.18.0