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Message-Id: <20210811163831.14917-1-james.morse@arm.com>
Date: Wed, 11 Aug 2021 16:38:31 +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>,
lcherian@...vell.com, bobo.shaobowang@...wei.com
Subject: [PATCH v7 25/24] x86/resctrl: Make resctrl_arch_get_config() return its value
resctrl_arch_get_config() has no return, but does pass a single value
back via one of its arguments.
Return the value instead.
Suggested-by: Borislav Petkov <bp@...en8.de>
Signed-off-by: James Morse <james.morse@....com>
---
arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 13 ++++++-------
arch/x86/kernel/cpu/resctrl/monitor.c | 2 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 20 ++++++++++++--------
include/linux/resctrl.h | 5 ++---
4 files changed, 21 insertions(+), 19 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
index 9e1c6730520b..4f79f1ad7f28 100644
--- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
+++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
@@ -427,16 +427,15 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
return ret ?: nbytes;
}
-void resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d,
- u32 closid, enum resctrl_conf_type type, u32 *value)
+u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d,
+ u32 closid, enum resctrl_conf_type type)
{
struct rdt_hw_domain *hw_dom = resctrl_to_arch_dom(d);
u32 idx = get_config_index(closid, type);
if (!is_mba_sc(r))
- *value = hw_dom->ctrl_val[idx];
- else
- *value = hw_dom->mbps_val[idx];
+ return hw_dom->ctrl_val[idx];
+ return hw_dom->mbps_val[idx];
}
static void show_doms(struct seq_file *s, struct resctrl_schema *schema, int closid)
@@ -451,8 +450,8 @@ static void show_doms(struct seq_file *s, struct resctrl_schema *schema, int clo
if (sep)
seq_puts(s, ";");
- resctrl_arch_get_config(r, dom, closid, schema->conf_type,
- &ctrl_val);
+ ctrl_val = resctrl_arch_get_config(r, dom, closid,
+ schema->conf_type);
seq_printf(s, r->format_str, dom->id, max_data_width,
ctrl_val);
sep = true;
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index eb227298487f..b0741bee79fc 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -442,7 +442,7 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_domain *dom_mbm)
hw_dom_mba = resctrl_to_arch_dom(dom_mba);
cur_bw = pmbm_data->prev_bw;
- resctrl_arch_get_config(r_mba, dom_mba, closid, CDP_NONE, &user_bw);
+ user_bw = resctrl_arch_get_config(r_mba, dom_mba, closid, CDP_NONE);
delta_bw = pmbm_data->delta_bw;
/*
* resctrl_arch_get_config() chooses the mbps/ctrl value to return
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 89123a4977cf..b57b3db9a6a7 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -923,8 +923,8 @@ static int rdt_bit_usage_show(struct kernfs_open_file *of,
for (i = 0; i < closids_supported(); i++) {
if (!closid_allocated(i))
continue;
- resctrl_arch_get_config(r, dom, i, s->conf_type,
- &ctrl_val);
+ ctrl_val = resctrl_arch_get_config(r, dom, i,
+ s->conf_type);
mode = rdtgroup_mode_by_closid(i);
switch (mode) {
case RDT_MODE_SHAREABLE:
@@ -1142,7 +1142,7 @@ static bool __rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain *d
/* Check for overlap with other resource groups */
for (i = 0; i < closids_supported(); i++) {
- resctrl_arch_get_config(r, d, i, type, (u32 *)&ctrl_b);
+ ctrl_b = resctrl_arch_get_config(r, d, i, type);
mode = rdtgroup_mode_by_closid(i);
if (closid_allocated(i) && i != closid &&
mode != RDT_MODE_PSEUDO_LOCKSETUP) {
@@ -1222,7 +1222,8 @@ static bool rdtgroup_mode_test_exclusive(struct rdtgroup *rdtgrp)
continue;
has_cache = true;
list_for_each_entry(d, &r->domains, list) {
- resctrl_arch_get_config(r, d, closid, s->conf_type, &ctrl);
+ ctrl = resctrl_arch_get_config(r, d, closid,
+ s->conf_type);
if (rdtgroup_cbm_overlaps(s, d, ctrl, closid, false)) {
rdt_last_cmd_puts("Schemata overlaps\n");
return false;
@@ -1395,8 +1396,9 @@ static int rdtgroup_size_show(struct kernfs_open_file *of,
if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP) {
size = 0;
} else {
- resctrl_arch_get_config(r, d, rdtgrp->closid,
- schema->conf_type, &ctrl);
+ ctrl = resctrl_arch_get_config(r, d,
+ rdtgrp->closid,
+ schema->conf_type);
if (r->rid == RDT_RESOURCE_MBA)
size = ctrl;
else
@@ -2724,10 +2726,12 @@ static int __init_one_rdt_domain(struct rdt_domain *d, struct resctrl_schema *s,
* with an exclusive group.
*/
if (resctrl_arch_get_cdp_enabled(r->rid))
- resctrl_arch_get_config(r, d, i, peer_type, &peer_ctl);
+ peer_ctl = resctrl_arch_get_config(r, d, i,
+ peer_type);
else
peer_ctl = 0;
- resctrl_arch_get_config(r, d, i, s->conf_type, &ctrl_val);
+ ctrl_val = resctrl_arch_get_config(r, d, i,
+ s->conf_type);
used_b |= ctrl_val | peer_ctl;
if (mode == RDT_MODE_SHAREABLE)
cfg->new_ctrl |= ctrl_val | peer_ctl;
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 18dd764af0dd..21deb5212bbd 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -194,8 +194,7 @@ struct resctrl_schema {
/* The number of closid supported by this resource regardless of CDP */
u32 resctrl_arch_get_num_closid(struct rdt_resource *r);
int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid);
-void resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d,
- u32 closid, enum resctrl_conf_type type,
- u32 *value);
+u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d,
+ u32 closid, enum resctrl_conf_type type);
#endif /* _RESCTRL_H */
--
2.30.2
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