[tip:x86/cache] x86/resctrl: Rename the RDT functions and definitions

From: tip-bot for Babu Moger
Date: Thu Nov 22 2018 - 16:47:43 EST

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Commit-ID: 352940ececaca58536a7fc4ff6b41d181156fd65
Gitweb: https://git.kernel.org/tip/352940ececaca58536a7fc4ff6b41d181156fd65
Author: Babu Moger <Babu.Moger@xxxxxxx>
AuthorDate: Wed, 21 Nov 2018 20:28:27 +0000
Committer: Borislav Petkov <bp@xxxxxxx>
CommitDate: Thu, 22 Nov 2018 20:16:18 +0100

x86/resctrl: Rename the RDT functions and definitions

As AMD is starting to support RESCTRL features, rename the RDT functions
and definitions to more generic names.

Replace "intel_rdt" with "resctrl" where applicable.

Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Brijesh Singh <brijesh.singh@xxxxxxx>
Cc: "Chang S. Bae" <chang.seok.bae@xxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Dmitry Safonov <dima@xxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Joerg Roedel <jroedel@xxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: <linux-doc@xxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Philippe Ombredanne <pombredanne@xxxxxxxx>
Cc: Pu Wen <puwen@xxxxxxxx>
Cc: <qianyue.zj@xxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Cc: Rian Hunter <rian@xxxxxxxxxxxx>
Cc: Sherry Hurwitz <sherry.hurwitz@xxxxxxx>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Thomas Lendacky <Thomas.Lendacky@xxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: <xiaochen.shen@xxxxxxxxx>
Link: https://lkml.kernel.org/r/20181121202811.4492-3-babu.moger@xxxxxxx
---
arch/x86/include/asm/resctrl_sched.h | 24 ++++++++++++------------
arch/x86/kernel/cpu/resctrl/core.c | 28 ++++++++++++++--------------
arch/x86/kernel/cpu/resctrl/internal.h | 2 +-
arch/x86/kernel/cpu/resctrl/monitor.c | 11 ++++++-----
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 10 +++++-----
arch/x86/kernel/process_32.c | 2 +-
arch/x86/kernel/process_64.c | 2 +-
7 files changed, 40 insertions(+), 39 deletions(-)

diff --git a/arch/x86/include/asm/resctrl_sched.h b/arch/x86/include/asm/resctrl_sched.h
index 9acb06b6f81e..6e082697a613 100644
--- a/arch/x86/include/asm/resctrl_sched.h
+++ b/arch/x86/include/asm/resctrl_sched.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_X86_INTEL_RDT_SCHED_H
-#define _ASM_X86_INTEL_RDT_SCHED_H
+#ifndef _ASM_X86_RESCTRL_SCHED_H
+#define _ASM_X86_RESCTRL_SCHED_H

#ifdef CONFIG_INTEL_RDT

@@ -10,7 +10,7 @@
#define IA32_PQR_ASSOC 0x0c8f

/**
- * struct intel_pqr_state - State cache for the PQR MSR
+ * struct resctrl_pqr_state - State cache for the PQR MSR
* @cur_rmid: The cached Resource Monitoring ID
* @cur_closid: The cached Class Of Service ID
* @default_rmid: The user assigned Resource Monitoring ID
@@ -24,21 +24,21 @@
* The cache also helps to avoid pointless updates if the value does
* not change.
*/
-struct intel_pqr_state {
+struct resctrl_pqr_state {
u32 cur_rmid;
u32 cur_closid;
u32 default_rmid;
u32 default_closid;
};

-DECLARE_PER_CPU(struct intel_pqr_state, pqr_state);
+DECLARE_PER_CPU(struct resctrl_pqr_state, pqr_state);

DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);

/*
- * __intel_rdt_sched_in() - Writes the task's CLOSid/RMID to IA32_PQR_MSR
+ * __resctrl_sched_in() - Writes the task's CLOSid/RMID to IA32_PQR_MSR
*
* Following considerations are made so that this has minimal impact
* on scheduler hot path:
@@ -51,9 +51,9 @@ DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
* simple as possible.
* Must be called with preemption disabled.
*/
-static void __intel_rdt_sched_in(void)
+static void __resctrl_sched_in(void)
{
- struct intel_pqr_state *state = this_cpu_ptr(&pqr_state);
+ struct resctrl_pqr_state *state = this_cpu_ptr(&pqr_state);
u32 closid = state->default_closid;
u32 rmid = state->default_rmid;

@@ -78,16 +78,16 @@ static void __intel_rdt_sched_in(void)
}
}

-static inline void intel_rdt_sched_in(void)
+static inline void resctrl_sched_in(void)
{
if (static_branch_likely(&rdt_enable_key))
- __intel_rdt_sched_in();
+ __resctrl_sched_in();
}

#else

-static inline void intel_rdt_sched_in(void) {}
+static inline void resctrl_sched_in(void) {}

#endif /* CONFIG_INTEL_RDT */

-#endif /* _ASM_X86_INTEL_RDT_SCHED_H */
+#endif /* _ASM_X86_RESCTRL_SCHED_H */
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 27c4316bb691..0cf890ae0de2 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -22,7 +22,7 @@
* Software Developer Manual June 2016, volume 3, section 17.17.
*/

-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define pr_fmt(fmt) "resctrl: " fmt

#include <linux/slab.h>
#include <linux/err.h>
@@ -40,12 +40,12 @@
DEFINE_MUTEX(rdtgroup_mutex);

/*
- * The cached intel_pqr_state is strictly per CPU and can never be
+ * The cached resctrl_pqr_state is strictly per CPU and can never be
* updated from a remote CPU. Functions which modify the state
* are called with interrupts disabled and no preemption, which
* is sufficient for the protection.
*/
-DEFINE_PER_CPU(struct intel_pqr_state, pqr_state);
+DEFINE_PER_CPU(struct resctrl_pqr_state, pqr_state);

/*
* Used to store the max resource name width and max resource data width
@@ -639,7 +639,7 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r)

static void clear_closid_rmid(int cpu)
{
- struct intel_pqr_state *state = this_cpu_ptr(&pqr_state);
+ struct resctrl_pqr_state *state = this_cpu_ptr(&pqr_state);

state->default_closid = 0;
state->default_rmid = 0;
@@ -648,7 +648,7 @@ static void clear_closid_rmid(int cpu)
wrmsr(IA32_PQR_ASSOC, 0, 0);
}

-static int intel_rdt_online_cpu(unsigned int cpu)
+static int resctrl_online_cpu(unsigned int cpu)
{
struct rdt_resource *r;

@@ -674,7 +674,7 @@ static void clear_childcpus(struct rdtgroup *r, unsigned int cpu)
}
}

-static int intel_rdt_offline_cpu(unsigned int cpu)
+static int resctrl_offline_cpu(unsigned int cpu)
{
struct rdtgroup *rdtgrp;
struct rdt_resource *r;
@@ -866,7 +866,7 @@ static __init bool get_rdt_resources(void)

static enum cpuhp_state rdt_online;

-static int __init intel_rdt_late_init(void)
+static int __init resctrl_late_init(void)
{
struct rdt_resource *r;
int state, ret;
@@ -877,8 +877,8 @@ static int __init intel_rdt_late_init(void)
rdt_init_padding();

state = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
- "x86/rdt/cat:online:",
- intel_rdt_online_cpu, intel_rdt_offline_cpu);
+ "x86/resctrl/cat:online:",
+ resctrl_online_cpu, resctrl_offline_cpu);
if (state < 0)
return state;

@@ -890,20 +890,20 @@ static int __init intel_rdt_late_init(void)
rdt_online = state;

for_each_alloc_capable_rdt_resource(r)
- pr_info("Intel RDT %s allocation detected\n", r->name);
+ pr_info("%s allocation detected\n", r->name);

for_each_mon_capable_rdt_resource(r)
- pr_info("Intel RDT %s monitoring detected\n", r->name);
+ pr_info("%s monitoring detected\n", r->name);

return 0;
}

-late_initcall(intel_rdt_late_init);
+late_initcall(resctrl_late_init);

-static void __exit intel_rdt_exit(void)
+static void __exit resctrl_exit(void)
{
cpuhp_remove_state(rdt_online);
rdtgroup_exit();
}

-__exitcall(intel_rdt_exit);
+__exitcall(resctrl_exit);
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 1b36709591d8..eeaee05522b5 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -69,7 +69,7 @@ struct rmid_read {
u64 val;
};

-extern unsigned int intel_cqm_threshold;
+extern unsigned int resctrl_cqm_threshold;
extern bool rdt_alloc_capable;
extern bool rdt_mon_capable;
extern unsigned int rdt_mon_features;
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index d492d4c0e8cc..ebf408db8191 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -73,7 +73,7 @@ unsigned int rdt_mon_features;
* This is the threshold cache occupancy at which we will consider an
* RMID available for re-allocation.
*/
-unsigned int intel_cqm_threshold;
+unsigned int resctrl_cqm_threshold;

static inline struct rmid_entry *__rmid_entry(u32 rmid)
{
@@ -107,7 +107,7 @@ static bool rmid_dirty(struct rmid_entry *entry)
{
u64 val = __rmid_read(entry->rmid, QOS_L3_OCCUP_EVENT_ID);

- return val >= intel_cqm_threshold;
+ return val >= resctrl_cqm_threshold;
}

/*
@@ -187,7 +187,7 @@ static void add_rmid_to_limbo(struct rmid_entry *entry)
list_for_each_entry(d, &r->domains, list) {
if (cpumask_test_cpu(cpu, &d->cpu_mask)) {
val = __rmid_read(entry->rmid, QOS_L3_OCCUP_EVENT_ID);
- if (val <= intel_cqm_threshold)
+ if (val <= resctrl_cqm_threshold)
continue;
}

@@ -625,6 +625,7 @@ static void l3_mon_evt_init(struct rdt_resource *r)

int rdt_get_mon_l3_config(struct rdt_resource *r)
{
+ unsigned int cl_size = boot_cpu_data.x86_cache_size;
int ret;

r->mon_scale = boot_cpu_data.x86_cache_occ_scale;
@@ -637,10 +638,10 @@ int rdt_get_mon_l3_config(struct rdt_resource *r)
*
* For a 35MB LLC and 56 RMIDs, this is ~1.8% of the LLC.
*/
- intel_cqm_threshold = boot_cpu_data.x86_cache_size * 1024 / r->num_rmid;
+ resctrl_cqm_threshold = cl_size * 1024 / r->num_rmid;

/* h/w works in units of "boot_cpu_data.x86_cache_occ_scale" */
- intel_cqm_threshold /= r->mon_scale;
+ resctrl_cqm_threshold /= r->mon_scale;

ret = dom_data_init(r);
if (ret)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index f5a76ca43f0f..2bf1f3227afa 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -298,7 +298,7 @@ static int rdtgroup_cpus_show(struct kernfs_open_file *of,
}

/*
- * This is safe against intel_rdt_sched_in() called from __switch_to()
+ * This is safe against resctrl_sched_in() called from __switch_to()
* because __switch_to() is executed with interrupts disabled. A local call
* from update_closid_rmid() is proteced against __switch_to() because
* preemption is disabled.
@@ -317,7 +317,7 @@ static void update_cpu_closid_rmid(void *info)
* executing task might have its own closid selected. Just reuse
* the context switch code.
*/
- intel_rdt_sched_in();
+ resctrl_sched_in();
}

/*
@@ -542,7 +542,7 @@ static void move_myself(struct callback_head *head)

preempt_disable();
/* update PQR_ASSOC MSR to make resource group go into effect */
- intel_rdt_sched_in();
+ resctrl_sched_in();
preempt_enable();

kfree(callback);
@@ -926,7 +926,7 @@ static int max_threshold_occ_show(struct kernfs_open_file *of,
{
struct rdt_resource *r = of->kn->parent->priv;

- seq_printf(seq, "%u\n", intel_cqm_threshold * r->mon_scale);
+ seq_printf(seq, "%u\n", resctrl_cqm_threshold * r->mon_scale);

return 0;
}
@@ -945,7 +945,7 @@ static ssize_t max_threshold_occ_write(struct kernfs_open_file *of,
if (bytes > (boot_cpu_data.x86_cache_size * 1024))
return -EINVAL;

- intel_cqm_threshold = bytes / r->mon_scale;
+ resctrl_cqm_threshold = bytes / r->mon_scale;

return nbytes;
}
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index d16207e7d1e5..dc4d92764d1a 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -302,7 +302,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
this_cpu_write(current_task, next_p);

/* Load the Intel cache allocation PQR MSR. */
- intel_rdt_sched_in();
+ resctrl_sched_in();

return prev_p;
}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 8f23562687fb..67f7f5b0b6b7 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -664,7 +664,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
}

/* Load the Intel cache allocation PQR MSR. */
- intel_rdt_sched_in();
+ resctrl_sched_in();

return prev_p;
}

Next message: tip-bot for Babu Moger: "[tip:x86/cache] x86/resctrl: Rename and move rdt files to a separate directory"
Previous message: Martin Blumenstingl: "Re: [PATCH] mmc: meson-mx-sdio: check devm_kasprintf for failure"
In reply to: Moger, Babu: "[PATCH v9 02/13] x86/resctrl: Rename the RDT functions and definitions"
Next in thread: Moger, Babu: "[PATCH v9 03/13] x86/resctrl: Re-arrange RDT init code"
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