linux-kernel - [PATCH v2 17/24] x86/resctrl: Use cdp_enabled in rdt_domain_reconfigure

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Message-Id: <20210312175849.8327-18-james.morse@arm.com>
Date:   Fri, 12 Mar 2021 17:58:42 +0000
From:   James Morse <james.morse@....com>
To:     x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        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,
        Jamie Iles <jamie@...iainc.com>,
        D Scott Phillips OS <scott@...amperecomputing.com>
Subject: [PATCH v2 17/24] x86/resctrl: Use cdp_enabled in rdt_domain_reconfigure_cdp()

rdt_domain_reconfigure_cdp() infers whether CDP is enabled by
checking the alloc_capable and alloc_enabled flags of the data
resources.

Now that we have an explicit cdp_enabled, use that.

Reviewed-by: Jamie Iles <jamie@...iainc.com>
Signed-off-by: James Morse <james.morse@....com>
---
 arch/x86/kernel/cpu/resctrl/rdtgroup.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 55c17adf763c..378cad0020da 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1933,14 +1933,16 @@ static int set_cache_qos_cfg(int level, bool enable)
 /* Restore the qos cfg state when a domain comes online */
 void rdt_domain_reconfigure_cdp(struct rdt_resource *r)
 {
-	if (!r->alloc_capable)
+	struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
+
+	if (!hw_res->cdp_capable)
 		return;
 
 	if (r == &rdt_resources_all[RDT_RESOURCE_L2DATA].resctrl)
-		l2_qos_cfg_update(&r->alloc_enabled);
+		l2_qos_cfg_update(&hw_res->cdp_enabled);
 
 	if (r == &rdt_resources_all[RDT_RESOURCE_L3DATA].resctrl)
-		l3_qos_cfg_update(&r->alloc_enabled);
+		l3_qos_cfg_update(&hw_res->cdp_enabled);
 }
 
 /*
-- 
2.30.0