From: Vikas Shivappa <vikas.shivappa@linux.intel.com>
To: vikas.shivappa@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org
Cc: hpa@zytor.com, tglx@linutronix.de, mingo@kernel.org,
peterz@infradead.org, ravi.v.shankar@intel.com,
tony.luck@intel.com, fenghua.yu@intel.com,
h.peter.anvin@intel.com
Subject: [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA
Date: Mon, 3 Apr 2017 14:57:30 -0700 [thread overview]
Message-ID: <1491256652-18729-7-git-send-email-vikas.shivappa@linux.intel.com> (raw)
In-Reply-To: <1491256652-18729-1-git-send-email-vikas.shivappa@linux.intel.com>
The files in the info directory for MBA are as follows:
num_closids
The maximum number of CLOSids available for MBA
min_bandwidth
The minimum memory bandwidth percentage value
bandwidth_gran
The granularity of the bandwidth control in percent for the
particular CPU SKU. Intermediate values entered are rounded off
to the previous control step available. Available bandwidth
control steps are minimum_bandwidth + N * bandwidth_gran.
delay_linear
When set, the OS writes a linear percentage based value to the
control MSRs ranging from minimum_bandwidth to 100 percent.
This value is informational and has no influence on the values
written to the schemata files. The values written to the
schemata are always bandwidth percentage that is requested.
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
---
arch/x86/include/asm/intel_rdt.h | 1 +
arch/x86/kernel/cpu/intel_rdt.c | 1 +
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 64 ++++++++++++++++++++++++++++++++
3 files changed, 66 insertions(+)
diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h
index e58e1d4..b42fba5 100644
--- a/arch/x86/include/asm/intel_rdt.h
+++ b/arch/x86/include/asm/intel_rdt.h
@@ -155,6 +155,7 @@ struct rdt_resource {
};
void rdt_get_cache_infofile(struct rdt_resource *r);
+void rdt_get_mba_infofile(struct rdt_resource *r);
extern struct mutex rdtgroup_mutex;
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index b50cb35..fd65548 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -197,6 +197,7 @@ static bool rdt_get_mem_config(struct rdt_resource *r)
return false;
}
r->data_width = 3;
+ rdt_get_mba_infofile(r);
r->capable = true;
r->enabled = true;
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index aee4a19..ce5b173 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -518,6 +518,36 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
return 0;
}
+static int rdt_min_bw_show(struct kernfs_open_file *of,
+ struct seq_file *seq, void *v)
+{
+ struct rdt_resource *r = of->kn->parent->priv;
+
+ seq_printf(seq, "%d\n", r->min_bw);
+
+ return 0;
+}
+
+static int rdt_bw_gran_show(struct kernfs_open_file *of,
+ struct seq_file *seq, void *v)
+{
+ struct rdt_resource *r = of->kn->parent->priv;
+
+ seq_printf(seq, "%d\n", r->bw_gran);
+
+ return 0;
+}
+
+static int rdt_delay_linear_show(struct kernfs_open_file *of,
+ struct seq_file *seq, void *v)
+{
+ struct rdt_resource *r = of->kn->parent->priv;
+
+ seq_printf(seq, "%d\n", r->delay_linear);
+
+ return 0;
+}
+
/* rdtgroup information files for one cache resource. */
static struct rftype res_cache_info_files[] = {
{
@@ -540,6 +570,40 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
},
};
+/* rdtgroup information files for memory bandwidth. */
+static struct rftype res_mba_info_files[] = {
+ {
+ .name = "num_closids",
+ .mode = 0444,
+ .kf_ops = &rdtgroup_kf_single_ops,
+ .seq_show = rdt_num_closids_show,
+ },
+ {
+ .name = "min_bandwidth",
+ .mode = 0444,
+ .kf_ops = &rdtgroup_kf_single_ops,
+ .seq_show = rdt_min_bw_show,
+ },
+ {
+ .name = "bandwidth_gran",
+ .mode = 0444,
+ .kf_ops = &rdtgroup_kf_single_ops,
+ .seq_show = rdt_bw_gran_show,
+ },
+ {
+ .name = "delay_linear",
+ .mode = 0444,
+ .kf_ops = &rdtgroup_kf_single_ops,
+ .seq_show = rdt_delay_linear_show,
+ },
+};
+
+void rdt_get_mba_infofile(struct rdt_resource *r)
+{
+ r->info_files = res_mba_info_files;
+ r->nr_info_files = ARRAY_SIZE(res_mba_info_files);
+}
+
void rdt_get_cache_infofile(struct rdt_resource *r)
{
r->info_files = res_cache_info_files;
--
1.9.1
next prev parent reply other threads:[~2017-04-03 21:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-03 21:57 [PATCH 0/8 V3] x86/intel_rdt: Intel Memory bandwidth allocation Vikas Shivappa
2017-04-03 21:57 ` [PATCH 1/8] Documentation, x86: " Vikas Shivappa
2017-04-05 15:30 ` Thomas Gleixner
2017-04-05 18:04 ` Shivappa Vikas
2017-04-03 21:57 ` [PATCH 2/8] x86/intel_rdt/mba: Generalize the naming to get ready for MBA Vikas Shivappa
2017-04-03 21:57 ` [PATCH 3/8] x86/intel_rdt/mba: Memory b/w allocation feature detect Vikas Shivappa
2017-04-03 21:57 ` [PATCH 4/8] x86/intel_rct/mba: Add MBA structures and initialize MBA Vikas Shivappa
[not found] ` <CAChUvXM8gWAz6-AJ6jkyKjf5Yz0ze-2XAtvdZvze3Go44TPD8A@mail.gmail.com>
2017-04-04 18:50 ` Shivappa Vikas
2017-04-05 15:40 ` Thomas Gleixner
2017-04-05 18:09 ` Shivappa Vikas
2017-04-03 21:57 ` [PATCH 5/8] x86/intel_rdt: Prep to add info files for MBA Vikas Shivappa
2017-04-03 21:57 ` Vikas Shivappa [this message]
2017-04-03 21:57 ` [PATCH 7/8] x86/intel_rdt: Prep to add schemata file " Vikas Shivappa
2017-04-03 21:57 ` [PATCH 8/8] x86/intel_rdt/mba: Add schemata file support " Vikas Shivappa
-- strict thread matches above, loose matches on Subject: below --
2017-04-08 0:33 [PATCH 0/8 V4] x86/intel_rdt: Intel Memory bandwidth allocation Vikas Shivappa
2017-04-08 0:33 ` [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA Vikas Shivappa
2017-02-17 19:58 [PATCH 0/8 V2] x86/intel_rdt: Intel Memory bandwidth allocation Vikas Shivappa
2017-02-17 19:58 ` [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA Vikas Shivappa
2017-03-01 16:05 ` Thomas Gleixner
2017-03-10 23:26 ` Shivappa Vikas
2017-01-10 19:33 [PATCH 0/8 V1] x86/intel_rdt: Memory b/w Allocation support Vikas Shivappa
2017-01-10 19:33 ` [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA Vikas Shivappa
2017-01-16 14:14 ` Thomas Gleixner
2017-01-18 1:02 ` Shivappa Vikas
2017-01-18 9:08 ` Thomas Gleixner
2017-01-23 19:45 ` Shivappa Vikas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1491256652-18729-7-git-send-email-vikas.shivappa@linux.intel.com \
--to=vikas.shivappa@linux.intel.com \
--cc=fenghua.yu@intel.com \
--cc=h.peter.anvin@intel.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=ravi.v.shankar@intel.com \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
--cc=vikas.shivappa@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.